!!!On arXiv !Skyrmion phase and competing magnetic orders on a breathing kagome lattice *Max Hirschberger, __Taro Nakajima__, Shang Gao, Licong Peng, Akiko Kikkawa, Takashi Kurumaji, Markus Kriener, Yuichi Yamasaki, Hajime Sagayama, Hironori Nakao, Kazuki Ohishi, Kazuhisa Kakurai, Yasujiro Taguchi, Xiuzhen Yu, Taka-hisa Arima, Yoshinori Tokura *[arXiv:1812.02553|https://arxiv.org/abs/1812.02553] !Emergent topological spin structures in a centrosymmetric cubic perovskite *S. Ishiwata, __T. Nakajima__, J. -H. Kim, D. S. Inosov, N. Kanazawa, J. S. White, J. L. Gavilano, R. Georgii, K. Seemann, G. Brandl, P. Manuel, D. D. Khalyavin, S. Seki, Y. Tokunaga, M. Kinoshita, Y. W. Long, Y. Kaneko, Y. Taguchi, T. Arima, B. Keimer, Y. Tokura *[https://arxiv.org/abs/1806.02309|https://arxiv.org/abs/1806.02309] !!!Original paper *total number of articles : 49 *1st author (& corresponding author) articles : 26 !Correlation between site occupancies and spin-glass transition in skyrmion host Co10-x/2Zn10-x/2Mnx, *__T. Nakajima__, K. Karube, Y. Ishikawa, M. Yonemura, N. Reynolds, J. S. White, H. M. Rønnow, A. Kikkawa, Y. Tokunaga, Y. Taguchi, Y. Tokura, and T. Arima, *[Phys. Rev. B 100, 064407 (2019).|https://doi.org/10.1103/PhysRevB.100.064407] !Skyrmion lattice with a giant topological Hall effect in a frustrated triangular-lattice magnet *Takashi Kurumaji, __Taro Nakajima__, Max Hirschberger, Akiko Kikkawa, Yuichi Yamasaki, Hajime Sagayama, Hironori Nakao, Yasujiro Taguchi, Taka-hisa Arima, Yoshinori Tokura *[Science (first release) (2019)|https://science.sciencemag.org/content/early/2019/08/07/science.aau0968] *[https://arxiv.org/abs/1805.10719|https://arxiv.org/abs/1805.10719] *[ナノ磁気渦形成の定説を覆す物質の開発に成功−磁気フラストレーションを利用して創発電磁気応答を巨大化−|http://www.riken.jp/pr/press/2019/20190809_3/] !Large Anomalous Hall Effect in Topological Insulators with Proximitized Ferromagnetic Insulators *Masataka Mogi, __Taro Nakajima__, Victor Ukleev, Atsushi Tsukazaki, Ryutaro Yoshimi, Minoru Kawamura, Kei S. Takahashi, Takayasu Hanashima, Kazuhisa Kakurai, Taka-hisa Arima, Masashi Kawasaki, and Yoshinori Tokura *[Phys. Rev. Lett. 123, 016804 (2019)|https://doi.org/10.1103/PhysRevLett.123.016804] *[arXiv:1906.02159|https://arxiv.org/abs/1906.02159] !Magnetization-polarization cross-control near room temperature in hexaferrite single crystals *V. Kocsis, __T. Nakajima__, M. Matsuda, A. Kikkawa, Y. Kaneko, J. Takashima, K. Kakurai, T. Arima, F. Kagawa, Y. Tokunaga, Y. Tokura and Y. Taguchi *[Nat. Commun. 10, 1247 (2019)|https://www.nature.com/articles/s41467-019-09205-x] *[室温近傍での電場による磁化制御−低消費電力の電圧制御磁気メモリの実現に道筋−|http://www.riken.jp/pr/press/2019/20190319_3/] !Topological transitions among skyrmion- and hedgehog-lattice states in cubic chiral magnets *Y. Fujishiro, N. Kanazawa, __T. Nakajima__, X. Z. Yu, K. Ohishi, Y. Kawamura, K. Kakurai, T. Arima, H. Mitamura, A. Miyake, K. Akiba, M. Tokunaga, A. Matsuo, K. Kindo, T. Koretsune, R. Arita & Y. Tokura *[Nat. Commun. 10, 1059 (2019).|https://doi.org/10.1038/s41467-019-08985-6] *[プレスリリース：相転移の狭間に出現する新たな創発磁気モノポール格子 -二つのトポロジカル磁気構造が移り変わる様子を解明-|https://www.t.u-tokyo.ac.jp/soe/press/setnws_201903061013118964663925.html] !Uniaxial-stress effects on helimagnetic orders and skyrmion lattice in Cu2OSeO3 *__Taro Nakajima__, Victor Ukleev, Kazuki Ohishi, Hiroshi Oike, Fumitaka Kagawa, Shin-ichiro Seki, Kazuhisa Kakurai, Yoshinori Tokura, and Taka-hisa Arima *[J. Phys. Soc. Jpn. 87, 094709 (2018)|https://doi.org/10.7566/JPSJ.87.094709] !Phase-transition kinetics of magnetic skyrmions investigated by stroboscopic small-angle neutron scattering *__Taro Nakajima__, Yasuhiro Inamura, Takayoshi Ito, Kazuki Ohishi, Hiroshi Oike, Fumitaka Kagawa, Akiko Kikkawa, Yasujiro Taguchi, Kazuhisa Kakurai, Yoshinori Tokura, and Taka-hisa Arima. *[Phys. Rev. B 98, 014424 (2018)|https://link.aps.org/doi/10.1103/PhysRevB.98.014424] *[プレスリリース：磁気渦の生成・消滅過程を100分の1秒単位で観測−J-PARC MLFのパルス中性子を用いたストロボ撮影に成功−|http://www.riken.jp/pr/press/2018/20180724_1/] !Unveiling structural, chemical and magnetic interfacial peculiarities in ε-Fe 2 O 3/GaN (0001) epitaxial films *Victor Ukleev, Sergey Suturin, __Taro Nakajima__, Taka-hisa Arima, Thomas Saerbeck, Takayasu Hanashima, Alla Sitnikova, Demid Kirilenko, Nikolai Yakovlev, Nikolai Sokolov *[Sci. Rep. 8, 8741 (2018)|https://doi.org/10.1038/s41598-018-25849-z] !Magnetic field tunable dielectric dispersion in successive field-induced magnetic phases of the geometrically frustrated magnet CuFeO2 up to 28 T *H. Tamatsukuri, S. Mitsuda, K. Hiroura, __T. Nakajima__, M. Fujihala, M. Yamano, Y. Toshioka, C. Kaneko, K. Takehana, Y. Imanaka, N. Terada, and H. Kitazawa *[Phys. Rev. B 97, 214407 (2018)|https://doi.org/10.1103/PhysRevB.97.214407] !N'eel-type Skyrmion lattice in the tetragonal polar magnet VOSe2O5 *Takashi Kurumaji, __Taro Nakajima__, Victor Ukleev, Artem Feoktystov, Taka-hisa Arima, Kazuhisa Kakurai, and Yoshinori Tokura *[Phys. Rev. Lett. 119, 237201 (2017)|https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.119.237201] !Superconductivity at the polar-nonpolar phase boundary of SnP with an unusual valence state *M. Kamitani, M. S. Bahramy, __T. Nakajima__, C. Terakura, D. Hashizume, T. Arima, and Y. Tokura *[Phys. Rev. Lett. 119, 207001 (2017)|https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.119.207001] (Editors' Suggestion) !Enhanced ferromagnetic transition temperature induced by a microscopic structural rearrangement in the diluted magnetic semiconductor Ge1−xMnxTe *M. Kriener, __T. Nakajima__, Y. Kaneko, A. Kikkawa, D. Hashizume, K. Kato, M. Takata, T. Arima, Y. Tokura, and Y. Taguchi *[Phys. Rev. B 95, 224418 (2017)|https://doi.org/10.1103/PhysRevB.95.224418] !Skyrmion lattice structural transition in MnSi *__Taro Nakajima__, Hiroshi Oike, Akiko Kikkawa, Elliot P. Gilbert, Norman Booth, Kazuhisa Kakurai, Yasujiro Taguchi, Yoshinori Tokura, Fumitaka Kagawa and Taka-hisa Arima *[Sci. Adv. 3, e1602562 (2017)|http://advances.sciencemag.org/content/3/6/e1602562] *Highlighted in [RIKEN RESEARCH|http://www.riken.jp/en/research/rikenresearch/highlights/20170011/] *Media release from ANSTO: [ Neutron scattering helps clarify the arrangement of magnetic vortices, skyrmions, in material |http://www.ansto.gov.au/AboutANSTO/MediaCentre/News/ACS136850] !Spin-lattice-coupling-mediated magnetoferroelectric phase transition induced by uniaxial pressure in multiferroic CuFe1−xMxO2 (M=Ga, Al) *Hiromu Tamatsukuri, Setsuo Mitsuda, Tenfu Nakamura, Kouhei Takata, __Taro Nakajima__, Karel Prokes, Fabiano Yokaichiya, and Klaus Kiefer *[Phys. Rev. B 95, 174108 (2017)|https://doi.org/10.1103/PhysRevB.95.174108] !E-type noncollinear magnetic ordering in multiferroic o-LuMnO3 *Saumya Mukherjee, Andreas Dönni, __Taro Nakajima__, Setsuo Mitsuda, Makoto Tachibana, Hideaki Kitazawa, Vladimir Pomjakushin, Lukas Keller, Christof Niedermayer, Andrea Scaramucci, and Michel Kenzelmann *[Phys. Rev. B 95, 104412 (2017)|http://link.aps.org/doi/10.1103/PhysRevB.95.104412] !Magnetic structures and excitations in a multiferroic Y-type hexaferrite BaSrCo2Fe11AlO22 *__Taro Nakajima__, Yusuke Tokunaga, Masaaki Matsuda, Sachith Dissanayake, Jaime Fernandez-Baca, Kazuhisa Kakurai, Yasujiro Taguchi, Yoshinori Tokura, and Taka-hisa Arima *[Phys. Rev. B. 94, 195154 (2016)|http://link.aps.org/doi/10.1103/PhysRevB.94.195154](Editors' Suggestion) !Uniaxial pressure effects on spin-lattice coupled phase transitions in a geometrical frustrated magnet CuFeO2 *H. Tamatsukuri, S. Aoki, S. Mitsuda, __T. Nakajima__, T. Nakamura, T. Itabashi, S. Hosaka, S. Ito, Y. Yamasaki, H. Nakao, K. Prokes and K. Kiefer *[Phys. Rev. B 94, 174402 (2016)|http://journals.aps.org/prb/abstract/10.1103/PhysRevB.94.174402] !Neutron diffraction study of low-temperature magnetic phase diagram of an isosceles-triangular-lattice Ising antiferromagnet CoNb2O6 *S. Kobayashi, S. Mitsuda, S. Hosaka, H. Tamatsukuri, __T. Nakajima__, H. Koorikawa, K. Prokes, and K. Kiefer *[Phys. Rev. B 94, 134427 (2016)|http://journals.aps.org/prb/abstract/10.1103/PhysRevB.94.134427] !Activation of frozen ferroelectric domain wall by magnetic field sweeping in multiferroic CuFeO2 *H. Tamatsukuri, S. Mitsuda, __T. Nakajima__, K. Shibata, C. Kaneko, K. Takehana, Y. Imanaka, N. Terada, H. Kitazawa, K. Prokes, S. Matas, K. Kiefer, S. Paeckel, A. Sokolowski, B. Klemke, and S. Gerischer *[Phys. Rev. B 93, 174101 (2016)|http://dx.doi.org/10.1103/PhysRevB.93.174101] !Heat-Treatment-Induced Switching of Magnetic States in the Doped Polar Semiconductor Ge1-xMnxTe *M. Kriener, __T. Nakajima__, Y. Kaneko, A. Kikkawa, X. Z. Yu, N. Endo, K. Kato, M. Takata, T. Arima, Y. Tokura, Y. Taguchi *[Sci. Rep. 6, 25748 (2016)|http://www.nature.com/articles/srep25748] ! Electromagnon excitation in the field-induced noncollinear ferrimagnetic phase of Ba2Mg2Fe12O22 studied by polarized inelastic neutron scattering and terahertz time-domain optical spectroscopy *__Taro Nakajima__, Youtarou Takahashi, Shunsuke Kibayashi, Masaaki Matsuda, Kazuhisa Kakurai, Shintaro Ishiwata, Yasujiro Taguchi, Yoshinori Tokura, and Taka-hisa Arima *[Phys. Rev. B 93, 035119 (2016)|http://journals.aps.org/prb/abstract/10.1103/PhysRevB.93.035119] !Piezomagnetoelectric Effect of Spin Origin in Dysprosium Orthoferrite *__Taro Nakajima__, Yusuke Tokunaga, Yasujiro Taguchi, Yoshinori Tokura, and Taka-hisa Arima. *[Phys. Rev. Lett. 115, 197205 (2015)|http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.115.197205] *[arXiv:1507.00449|http://arxiv.org/abs/1507.00449] !Uniaxial stress control of skyrmion phase *Y. Nii, __T. Nakajima__, A. Kikkawa, Y. Yamasaki, K. Ohishi, J. Suzuki, Y. Taguchi, T. Arima, Y. Tokura and Y. Iwasa. *[Nat. Commun. 6, 8539 (2015).|http://www.nature.com/ncomms/2015/151013/ncomms9539/full/ncomms9539.html] *[プレスリリース：磁気渦を押すだけで生成・消去できる新手法を発見|http://www.riken.jp/pr/press/2015/20151013_2/] !Large anisotropic deformation of skyrmions in strained crystal * K. Shibata, J. Iwasaki, N. Kanazawa, S. Aizawa, T. Tanigaki, M. Shirai, __T. Nakajima__, M. Kubota, M. Kawasaki, H. S. Park, D. Shindo, N. Nagaosa & Y. Tokura *[Nat. Nanotech. 10, 589 (2015)|http://www.nature.com/nnano/journal/vaop/ncurrent/full/nnano.2015.113.html] ! Two kinds of in-plane resistivity anisotropy in Fe1+δTe (δ=0.09) as seen via synchrotron radiation x-ray diffraction and in-situ resistivity measurements *__Taro Nakajima__, Tadashi Machida, Hironori Kariya, Daiki Morohoshi, Yuichi Yamasaki, Hironori Nakao, Kazuto Hirata, Takashi Mochiku, Hiroyuki Takeya, Setsuo Mitsuda, and Hideaki Sakata *[Phys. Rev. B 91, 205125 (2015)|http://journals.aps.org/prb/abstract/10.1103/PhysRevB.91.205125] ! X-ray induced lock-in transition of cycloidal magnetic order in a multiferroic perovskite manganite *Y. Yamasaki, H. Nakao, Y. Murakami, __T. Nakajima__, A. L. Sampietro, H. Ohsumi, M. Takata, T. Arima, and Y. Tokura *[Phys. Rev. B 91, 100403(R) (2015) |http://journals.aps.org/prb/abstract/10.1103/PhysRevB.91.100403] (Editors' suggestion) !Uniaxial-stress control of spin-driven ferroelectricity in multiferroic Ba2CoGe2O7 *__Taro Nakajima__, Yusuke Tokunaga, Vilmos Kocsis, Yasujiro Taguchi, Yoshinori Tokura, and Taka-hisa Arima *[Phys. Rev. Lett. 114 067201 (2015)|http://journals.aps.org/prl/abstract/10.1103/PhysRevLett.114.067201] *Highlighted in [RIKEN RESEARCH|http://www.riken.jp/en/research/rikenresearch/highlights/8016/] !Magnetic domain growth in geometrically frustrated Ising antiferromagnets Co1-xMgxNb2O6 (x=0, 0.004) as seen via time-resolved neutron diffraction measurements *__Taro Nakajima__, Setsuo Mitsuda, Yu Inomoto, Karel Prokes, Vadim Sikolenko, Sebastian Gerischer, Satoru Kobayashi *[Phys. Rev. B 90 064431 (2014)|https://journals.aps.org/prb/abstract/10.1103/PhysRevB.90.064431] !Nonmagnetic impurity effect on magnetic phase transitions in an isosceles triangular lattice Ising chain antiferromagnet CoNb2O6 *__Taro Nakajima__, Setsuo Mitsuda, Hidekazu Okano, Yu Inomoto, Satoru Kobayashi, Karel Prokes, Sebastian Gerischer, Peter Smeibidl *[J. Phys. Soc. Jpn. 83 094723 (2014)|http://dx.doi.org/10.7566/JPSJ.83.094723] !Uniaxial-pressure control of geometrical spin frustration in an Ising antiferromagnet CoNb2O6 via anisotropic deformation of the isosceles lattice *S. Kobayashi, S. Hosaka, H. Tamatsukuri, __T. Nakajima__, S. Mitsuda, K. Prokes, and K. Kiefer *[Phys. Rev. B 90, 060412R (2014)|http://journals.aps.org/prb/abstract/10.1103/PhysRevB.90.060412] !Electric polarization along the c axis in the ferroelectric helimagnetic phase of CuFe1-xGaxO2 (x=0.035) *C. Kaneko, __T. Nakajima (c. a.)__, S. Mitsuda, Y. Tanaka and N. Terada *[Phys. Rev. B 90 085109 (2014)|http://journals.aps.org/prb/abstract/10.1103/PhysRevB.90.085109] !Spin-driven bond order in a 1/5-magnetization plateau phase in a triangular lattice antiferromagnet CuFeO2 *__Taro Nakajima__, Noriki Terada, Setsuo Mitsuda, Robert Bewley. *[Phys. Rev. B 88 134414 (2013)|http://link.aps.org/doi/10.1103/PhysRevB.88.134414] *[arXiv:1310.2746|http://arxiv.org/abs/1310.2746] *[Erratum Phys. Rev. B 89, 019901(E) (2014)|http://prb.aps.org/abstract/PRB/v89/i1/e019901] !Uniaxial pressure effects on spin-driven lattice distortion in geometrically frustrated magnets CuFe1-xGaxO2 (x=0, 0.035) *__Taro Nakajima__, Yusuke Iguchi, Hiromu Tamatsukuri, Setsuo Mitsuda,Yuichi Yamasaki, Hironori Nakao, Noriki Terada. *[J. Phys. Soc. Jpn. 82 114711 (2013)|http://jpsj.ipap.jp/link?JPSJ/82/114711] //!Uniaxial pressure effect on magnetic ordering in a frustrated isosceles triangular lattice Ising //antiferromagnet CoNb2O6: Magnetization measurement study //*S. Kobayashi et al. //*(submitted) !Residual-Charge Induced Memory Effect of Electric Polarization in Multiferroic CuFe1-xGaxO2 as seen via Polarized Neutron Diffraction *__Taro Nakajima__, Setsuo Mitsuda, Hiroe Yamazaki and Masato Matsuura *[J. Phys. Soc. Jpn. 82 024706 (2013)|http://jpsj.ipap.jp/link?JPSJ/82/024706] !Incommensurate Orbital Modulation behind Ferroelectricity in CuFeO2 *Yoshikazu Tanaka, Noriki Terada, __Taro Nakajima__, Taro Kojima, Yasutaka Takata, Setsuo Mitsuda, Masaki Oura, Yasunori Senba, Haruhiko Ohashi, Shik Shin *[Phys. Rev. Lett. 109 127205 (2012) |http://prl.aps.org/abstract/PRL/v109/i12/e127205] *[arXiv:1012.3586|http://arxiv.org/abs/1012.3586] !Uniaxial-Pressure Control of Magnetic Phase Transitions in a Frustrated Magnet CuFe1-xGaxO2 (x = 0, 0.018) *__Taro Nakajima__, Setsuo Mitsuda, Keiichiro Takahashi, Keisuke Yoshitomi, Kazuya Masuda, Chikafumi Kaneko, Yuki Honma, Satoru Kobayashi, Hideaki Kitazawa, Masashi Kosaka, Naofumi Aso, Yoshiya Uwatoko, Noriki Terada, Shuichi Wakimoto, Masayasu Takeda, Kazuhisa Kakurai *[J. Phys. Soc. Jpn. 81 094710 (2012)|http://jpsj.ipap.jp/link?JPSJ/81/094710] !Magnetic interactions in the multiferroic phase of CuFe1-xGaxO2 (x = 0.035) refined by inelastic neutron scattering with uniaxial-pressure control of domain structure *__Taro Nakajima__, Setsuo Mitsuda, Jason T. Haraldsen, Randy S. Fishman, Tao Hong, Noriki Terada and Yoshiya Uwatoko *[Phys. Rev. B 85 144405 (2012)|http://link.aps.org/doi/10.1103/PhysRevB.85.144405] !Magnons and electromagnons in a spin-lattice coupled frustrated magnet CuFeO2 as seen via inelastic neutron scattering *__Taro Nakajima__, Azusa Suno, Setsuo Mitsuda, Noriki Terada, Shojiro Kimura, Koji Kaneko, Hiroki Yamauchi *[Phys. Rev. B 84 184401 (2011)|http://prb.aps.org/abstract/PRB/v84/i18/e184401] *[arXiv:1108.1297|http://arxiv.org/abs/1108.1297] !Control of ferroelectric polarization via uniaxial pressure in the spin-lattice-coupled multiferroic CuFe1-xGaxO2 *__T. Nakajima__, S. Mitsuda, T. Nakamura, H. Ishii, T. Haku, Y. Honma, M. Kosaka, N. Aso, Y. Uwatoko *[Phys. Rev. B. 83 220101R (2011)|http://prb.aps.org/abstract/PRB/v83/i22/e220101] *[arXiv:1105.3525|http://arxiv.org/abs/1105.3525] !Spin Wave Spectrum in ‘Single-Domain’ Magnetic Ground State of Triangular Lattice Antiferromagnet CuFeO2 *__Taro Nakajima__, Setsuo Mitsuda, Tendai Haku, Kohei Shibata, Keisuke Yoshitomi, Yukio Noda, Naofumi Aso, Yoshiya Uwatoko and Noriki Terada *[J. Phys. Soc. Jpn. 80 014714 (2011)|http://jpsj.ipap.jp/link?JPSJ/80/014714] *[arXiv:1011.2859|http://arxiv.org/abs/1011.2859] !Spin-helicity Dependent Magnetic Domain Growth in a Spin-driven Multiferroic under Applied Electric Field *__T. Nakajima__, S. Mitsuda, K. Takahashi, H. Yamazaki, K. Yoshitomi, M. Soda, M. Matsuura, K. Hirota *[Phys. Rev. B 82 064418 (2010)|http://link.aps.org/doi/10.1103/PhysRevB.82.064418] !Charge disproportionation associated with spin ordering in delafossite CuFeO2 as seen via resonant x-ray diffraction *N. Terada, __T. Nakajima__, S. Mitsuda, Y. Tanaka, H. Mamiya and H. Kitazawa *[Phys. Rev. B 81 064424 (2010)|http://prb.aps.org/abstract/PRB/v81/i6/e064424] !Anisotropic magnetic field responses of ferroelectric polarization in a trigonal multiferroic CuFe1-xAlxO2 (x=0.015) *__T. Nakajima__, S. Mitsuda, S. Kanetsuki, M. Yamano, S. Iwamoto, Y. Yoshida, H. Mitamura, Y. Sawai, M. Tokunaga, K. Kindo, K. Prokes, A. Podlesnyak *[Phys. Rev. B 81 014422 (2010)|http://prb.aps.org/abstract/PRB/v81/i1/e014422] (Editors' Suggestion) *[arXiv:0912.2584|http://arxiv.org/abs/0912.2584] !Comprehensive study on ferroelectricity induced by a proper-screw type magnetic ordering in multiferroic CuFeO2: Nonmagnetic impurity effect on magnetic and ferroelectric order *__T. Nakajima__, S. Mitsuda, K. Takahashi, M. Yamano, K. Masuda, H. Yamazaki K. Prokes, K. Kiefer, S. Gerischer, N. Terada H. Kitazawa, M. Matsuda, K. Kakurai, H. Kimura, Y. Noda, M. Soda, M. Matsuura, and K. Hirota *[Phys. Rev. B 79 214423 (2009)|http://link.aps.org/doi/10.1103/PhysRevB.79.214423] !Evidence for large electric polarization from collinear magnetism in TmMnO3 *V. Yu. Pomjakushin, M. Kenzelmann, A. Donni, A. B. Harris, __T. Nakajima__, S. Mitsuda, M. Tachibana, L. Keller, J. Mesot, H. Kitazawa, E. Takayama-Muromachi *[New Journal of Physics. 11 043019 (2009)|http://www.iop.org/EJ/abstract/-kwd=nj-2f18/1367-2630/11/4/043019] *[arXiv:0901.0787|http://arxiv.org/abs/0901.0787] !Identification of microscopic spin-polarization coupling in the ferroelectric phase of magnetoelectric multiferroic CuFe1-xAlxO2 *__T. Nakajima__, S. Mitsuda, T. Inami, N. Terada, H. Ohsumi, K. Prokes, and A. Podlesnyak. *[Phys. Rev. B 78 024106 (2008)|http://link.aps.org/abstract/PRB/v78/e024106] (Editors' Suggestion) *[arXiv:0806.2004|http://jp.arxiv.org/abs/0806.2004] !Ga-substitution-induced single ferroelectric phase in multiferroic CuFeO2 *N. Terada, __T. Nakajima__, S. Mitsuda, H. Kitazawa, K. Kaneko, and M. Metoki. *[Phys. Rev. B 78 014101 (2008)|http://link.aps.org/abstract/PRB/v78/e014101] (Editors' Suggestion) !Electric Polarization Induced by a Proper Helical Magnetic Ordering in a Delafossite Multiferroic CuFe1-xAlxO2 *__T. Nakajima__, S. Mitsuda, S. Kanetsuki, K. Tanaka, K. Fujii, N. Terada, M. Soda, M. Matsuura and K. Hirota *[Phys. Rev. B 77 052401 (2008)|http://link.aps.org/abstract/PRB/v77/e052401] *[arXiv: 0707.2703|http://jp.arxiv.org/abs/0707.2703] !Spin Noncollinearlity in Multiferroic Phase of Triangular Lattice Antiferromagnet CuFe1-xAlxO2 *__T. Nakajima__, S. Mitsuda, S. Kanetsuki, K. Prokes, A. Podlesnyak, H. Kimura and Y. Noda *[J. Phys. Soc. Jpn. 76, 043709 (2007)|http://dx.doi.org/10.1143/JPSJ.76.043709] ---- !!!Review paper !Observation of Magnetic Skyrmions by Neutron Scattering *__Taro Nakajima__, and Taka-hisa Arima *[J. Phys. Soc. Jpn. 88, 081006 (2019)|https://journals.jps.jp/doi/full/10.7566/JPSJ.88.081006] **SPECIAL TOPICS: New Frontiers in Physics with Spin, Orbital, and Atomic Correlations Using Neutron Scattering ---- !!!Proceedings !Uniaxial-stress enhancement of spin-driven ferroelectric polarization in a multiferroic CuFe1-xGaxO2 *S Mitsuda, K Yoshitomi, __T Nakajima__, C Kaneko, H Yamazaki, M Kosaka, N Aso, Y Uwatoko4, Y Noda, M Matsuura, N Terada, S Wakimoto, M Takeda and K Kakurai *[J. Phys.: Conf. Ser. 340 012062 (2012)|http://iopscience.iop.org/1742-6596/340/1/012062] **Proceeding of ECNS2011 !Exchange-striction associated with the elliptical proper helical magnetic structure in the ferroelectric phase of CuFe1-yGayO2 *N. Terada, __T. Nakajima__, S. Mitsuda, M. Matsuda, K. Kakurai, Y. Tanaka and H. Kitazawa *[ J. Phys.:Conf. Series 211 012005 (2010)|http://iopscience.iop.org/1742-6596/211/1/012005] **Proceeding of PNSXM2009 !Electric field dependence of magnetic correlation in magneto-electric multiferroic CuFe1-xAlxO2 *__T. Nakajima__, S. Mitsuda, K. Takahashi, Y. Kaneko, T. Ito, M. Fukunaga, H. Kimura and Y. Noda *[J. Phys.:Conf. Series. 200 012139 (2010)|http://www.iop.org/EJ/abstract/1742-6596/200/1/012139] **Proceeding of ICM2009 !Dielectric relaxation in a nonferroelectric phase of magnetoelectric multiferroic CuFeO2 *S. Mitsuda, M. Yamano, K. Kuribara, __T. Nakajima__, K. Masuda, K. Yoshitomi, N. Terada, H. Kitazawa, K. Takenaka and T. Takamasu *[J. Phys.:Conf. Series. 200 012120 (2010)|http://www.iop.org/EJ/abstract/1742-6596/200/1/012120] **Proceeding of ICM2009 !Electric polarization memory effect in a magnetoelectric multiferroic CuFe1-xGaxO2 *S. Mitsuda, __T. Nakajima__, M. Yamano, K. Takahashi, H. Yamazaki, K. Masuda, Y. Kaneko, N. Terada, K. Prokes, K. Kiefier *[Physica B Vol. 404, Issue 17, Pages 2532-2534 (2009)|http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TVH-4WHFD6W-2&_user=139640&_coverDate=09%2F01%2F2009&_alid=988862076&_rdoc=1&_fmt=high&_orig=search&_cdi=5535&_sort=r&_docanchor=&view=c&_ct=1&_acct=C000011560&_version=1&_urlVersion=0&_userid=139640&md5=8ea637e0a66caad26557fbfe0f77620e] **Proceeding of QuBS2008 !Magnetic phase diagram of multiferroic delafossite CuFe1-yGayO2 *N. Terada, __T. Nakajima__, S. Mitsuda and H. Kitazawa *[J. Phys.: Conf. Ser. 145 (2009) 012071|http://www.iop.org/EJ/abstract/1742-6596/145/1/012071] **Proceeding of Highly Frustrated Magnetism 2008 !Zero-field random-field effect in diluted triangular lattice antiferromanget CuFe1-xAlxO2 *__T. Nakajima__, S. Mitsuda, K. Kitagawa, N. Terada, T. Komiya, Y. Noda *[Journal of Physics : Condensed Matter 19 (2007) 145216|http://www.iop.org/EJ/abstract/0953-8984/19/14/145216/] **[Proceeding of Highly Frustrated Magnetism 2006] !Field-Induced Ferroelectric State in Frustrated Manget CuFe1-xAlxO2 *S. Kanetsuki, S. Mitsuda, __T. Nakajima__, D. Anazawa, H. A. Katori, K. Prokes *[Journal of Physiscs : Condensed Matter 19 (2007) 145244|http://www.iop.org/EJ/abstract/0953-8984/19/14/145244/] **[Proceeding of Highly Frustrated Magnetism 2006]