2021

Zoology of Multiple-Q Spin Textures in a Centrosymmetric Tetragonal Magnet with Itinerant Electrons

• Nguyen Duy Khanh, Taro Nakajima, Satoru Hayami, Shang Gao, Yuichi Yamasaki, Hajime Sagayama, Hironori Nakao, Rina Takagi, Yukitoshi Motome, Yoshinori Tokura, Taka-hisa Arima, Shinichiro Seki

• Adv. Sci. 2105452 (2022).

Above-ordering-temperature large anomalous Hall effect in a   triangular-lattice magnetic semiconductor

• Masaki Uchida, Shin Sato, Hiroaki Ishizuka, Ryosuke Kurihara, Taro Nakajima, Yusuke Nakazawa, Mizuki Ohno, Markus Kriener, Atsushi Miyake, Kazuki Ohishi, Toshiaki Morikawa, Mohammad Saeed Bahramy, Taka-hisa Arima, Masashi Tokunaga, Naoto Nagaosa, Masashi Kawasaki

• Sci. Adv. 7, abl5381 (2021).

• Press release: 「巨大な磁場応答を示す三角格子磁性半導体 －三拍子揃った稀有な磁性材料の発見－」

Emergence of spin-orbit coupled ferromagnetic surface state derived from Zak phase in a nonmagnetic insulator FeSi

• Yusuke Ohtsuka, Naoya Kanazawa, Motoaki Hirayama, Akira Matsui, Takuya Nomoto, Ryotaro Arita, Taro Nakajima, Takayasu Hanashima, Victor Ukleev, Hiroyuki Aoki, Masataka Mogi, Kohei Fujiwara, Atsushi Tsukazaki, Masakazu Ichikawa, Masashi Kawasaki, Yoshinori Tokura

• Sci. Adv. 7, eabj0498 (2021).

• arxiv: 2104.12438

• Press release: 「鉄シリコン化合物における新しいトポロジカル表面状態 －ありふれた元素を用いたスピントロニクス機能の実現－」

Robust noncoplanar magnetism in band-filling-tuned (Nd1-xCax)2Mo2O7

• Max Hirschberger, Yoshio Kaneko, Leonie Spitz, Taro Nakajima, Yasujiro Taguchi, and Yoshinori Tokura

• Phys. Rev. B 104, 024436 (2021).

Phase correction method in a wide detector plane for MIEZE spectroscopy with pulsed neutron beams

• Tatsuro Oda, Hitoshi Endo, Hidetoshi Ohshita, Tomohiro Seya, Yoshiji Yasu, Taro Nakajima, Masahiro Hino, Yuji Kawabata

• Nuclear Instruments and Methods in Physics Research Section A, 1012, 165616 (2021).

Direct Observation of Cycloidal Spin Modulation and Field-induced Transition in Néel-type Skyrmion-hosting VOSe2O5

• Takashi Kurumaji, Taro Nakajima, Artem Feoktystov, Earl Babcock, Zahir Salhi, Victor Ukleev , Taka-hisa Arima, Kazuhisa Kakurai, and Yoshinori Tokura. 

• J. Phys. Soc. Jpn. 90, 024705 (2021) [Open select]. 

2020

Crystallization of magnetic skyrmions in MnSi investigated by neutron spin echo spectroscopy

• Taro Nakajima, Tatsuro Oda, Masahiro Hino, Hitoshi Endo, Kazuki Ohishi, Kazuhisa Kakurai, Akiko Kikkawa, Yasujiro Taguchi, Yoshinori Tokura, and Taka-hisa Arima

• Phys. Rev. Research 2, 043393 (2020). 

Highly tunable topological system based on PbTe-SnTe binary alloy

• Cheng-Long Zhang, Tian Liang, Naoki Ogawa, Yoshio Kaneko, Markus Kriener, Taro Nakajima, Yasujiro Taguchi, and Yoshinori Tokura

• Phys. Rev. Mat. 4, 091201 (2020). 

Topological Nernst Effect of the Two-Dimensional Skyrmion Lattice

• Max Hirschberger, Leonie Spitz, Takuya Nomoto, Takashi Kurumaji, Shang Gao, Jan Masell, Taro Nakajima, Akiko Kikkawa, Yuichi Yamasaki, Hajime Sagayama, Hironori Nakao, Yasujiro Taguchi, Ryotaro Arita, Taka-hisa Arima, and Yoshinori Tokura

• Phys. Rev. Lett. 125, 076602 (2020). 

High-field depinned phase and planar Hall effect in the skyrmion host Gd2PdSi3

• Max Hirschberger, Taro Nakajima, Markus Kriener, Takashi Kurumaji, Leonie Spitz, Shang Gao, Akiko Kikkawa, Yuichi Yamasaki, Hajime Sagayama, Hironori Nakao, Seiko Ohira-Kawamura, Yasujiro Taguchi, Taka-hisa Arima, and Yoshinori Tokura

• Phys. Rev. B 101, 220401(R) (2020). 

Nanometric square skyrmion lattice in a centrosymmetric tetragonal magnet

• Nguyen Duy Khanh, Taro Nakajima, Xiuzhen Yu, Shang Gao, Kiyou Shibata, Max Hirschberger, Yuichi Yamasaki, Hajime Sagayama, Hironori Nakao, Licong Peng, Kiyomi Nakajima, Rina Takagi, Taka-hisa Arima, Yoshinori Tokura, Shinichiro Seki 

• Nat. Nanotech. 15, 444 (2020).

• Press release : 新機構が生み出す過去最小の磁気渦粒子を発見 (東京大学大学院 工学系研究科)

Monoclinic semimetal IrSi synthesized under high pressure above 25 GPa: Crystal structure, electronic, and magnetic properties

• Y. Fujishiro, N. Kanazawa, T. Shinmei, M. Nishi, T. Nakajima, T. Arima, D. Hashizume, M. S. Bahramy, T. Irifune, and Y. Tokura

• Phys. Rev. Materials 4, 055002 (2020). [Editors' Suggestion]

Emergent topological spin structures in the centrosymmetric cubic perovskite SrFeO3

• S. Ishiwata, T. Nakajima, J.-H. Kim, D. S. Inosov, N. Kanazawa, J. S. White, J. L. Gavilano, R. Georgii, K. M. 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, and Y. Tokura

• Phys. Rev. B 101, 134406 (2020). [Editors' Suggestion]

Stability of multiferroic phase and magnetization-polarization coupling in Y-type hexaferrite crystals

• V. Kocsis, T. Nakajima, M. Matsuda, A. Kikkawa, Y. Kaneko, J. Takashima, K. Kakurai, T. Arima, Y. Tokunaga, Y. Tokura, and Y. Taguchi

• Phys. Rev. B 101, 075136 (2020). 

2019

Ordering phenomena of spin trimers accompanied by a large geometrical Hall effect

• Shang Gao, Max Hirschberger, Oksana Zaharko, Taro Nakajima, Takashi Kurumaji, Akiko Kikkawa, Junichi Shiogai, Atsushi Tsukazaki, Shojiro Kimura, Satoshi Awaji, Yasujiro Taguchi, Taka-hisa Arima, and Yoshinori Tokura

• Phys. Rev. B 100, 241115(R). [Editors' suggestion}

Skyrmion phase and competing magnetic orders on a breathing kagomé 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 

•  Nat. Commun.  10, 5831 (2019). 

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). 

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 365, 914-918 (2019), 

• Press release : 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－]

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),  

• arXiv:1906.02159

Observation of Magnetic Skyrmions by Neutron Scattering

• Taro Nakajima and Taka-hisa Arima, 

• J. Phys. Soc. Jpn. 88, 081006 (2019). [SPECIAL TOPICS: New Frontiers in Physics with Spin, Orbital, and Atomic Correlations Using Neutron Scattering]

 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), 

• Press release : 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－

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).

• Press release : 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-

2018

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).

 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), 

• Press release : 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－

Unveiling structural, chemical and magnetic interfacial peculiarities in ε-Fe2O3/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).

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).

2017

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).

 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) (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).

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), 

• Highlighted in RIKEN RESEARCH, 

• Media release from ANSTO: Neutron scattering helps clarify the arrangement of magnetic vortices, skyrmions, in material

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).

E-type noncollinear magnetic ordering in multiferroic o-LuMnO3

• Saumya Mukherjee, Andreas Donni, 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).

2016

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)(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)

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)

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)

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)

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)

2015

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)

• arXiv: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).

• 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

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)

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)

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) (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)

• Highlighted in RIKEN RESEARCH

2014

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)

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)

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)

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)

2013

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)

• arXiv:1310.2746

• Erratum Phys. Rev. B 89, 019901(E) (2014)

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)

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)

2012

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) 

• arXiv: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)

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)

2011

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)

• arXiv: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)

• arXiv: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)

• arXiv:1011.2859

2010

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)

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)

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) (Editors' Suggestion)

• arXiv:0912.2584

2007-2009

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)

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)

• arXiv: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) (Editors' Suggestion)

• arXiv: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) (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)

• arXiv: 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)