Publication

2020

77. "Soft X-ray Vortex Beam detected by In-line Holography",
Yuta Ishii, Kohei Yamamoto, Yuichi Yokoyama, Masaichiro Mizumaki, Hironori Nakao, Taka-hisa Arima, Yuichi Yamasaki;
Phys. Rev. Applied 14, 064069 (2020); 10.1103/PhysRevApplied.14.064069; 2020/12/24, arXiv:2006.16552

76. M. Onose, H. Takahashi, H. Sagayama, Y. Yamasaki, and S. Ishiwata,
"Complete phase diagram of Sr1−xLaxFeO3 with versatile magnetic and charge ordering",
Physical Review Materials.4, 114420 (2020); 10.1103/PhysRevMaterials.4.114420 ; 2020/11/30

75. R.Takagi, Y. Yamasaki, T. Yokouchi, V. Ukleev, Y. Yokoyama, H. Nakao, T. Arima, Y. Tokura, S. Seki,
"Particle-size dependent structural transformation of skyrmion lattice",
Nature Communications 11, 5485 (2020), 10.1038/s41467-020-19480-8

74. T. Honda, Y. Yamasaki, H. Nakao, Y. Murakami, T. Ogura, Y. Kousaka, andJ. Akimitsu,
Topological Metastability Supported by Thermal Fluctuation upon Formation of Chiral Soliton Lattice in CrNb3S6,
Scientific Reports. 10, 18596 (2020), 10.1038/s41598-020-74945-6

73. Yoshinori Nakanishi-Ohno and Yuichi Yamasaki,
Multiplication Method for Fine-Tuning Regularization Parameter of a Sparse Modeling Technique Tentatively Optimized via Cross Validation,
J. Phys. Soc. Jpn. 89, 094804 (2020), 10.7566/JPSJ.89.094804

72. Max Hirschberger, Taro Nakajima, Markus Kriener, Takashi Kurumaji, Leonie Spitz, Akiko Kikkawa, Yuichi Yamasaki, Hajime Sagayama, Hironori Nakao, Yasujiro Taguchi, Taka-hisa Arima, Yoshinori Tokura,
Topological Nernst effect of the two-dimensional skyrmion lattice,
Phys. Rev. Lett., 10.1103/PhysRevLett.125.076602/

71. Y. Araki, T. Sato, Y. Fujima, N. Abe, M.Tokunaga, S. Kimura, D. Morikawa, V. Ukleev, Y.Yamasaki, C. Tabata, H. Nakao, Y. Murakami, H. Sagayama, K. Ohishi, Y.Tokunaga, and T. Arima,
Metamagnetic transitions and magnetoelectric responses in a chiral polar helimagnet Ni2InSbO6,
Phys. Rev. B 102, 054409, 10.1103/PhysRevB.102.054409

70. Y. Yamasaki, H. Nakao, T. Arima,
Augmented magnetic octupole in Kagome 120-degree antiferromagnets detectable via x-ray magnetic circular dichroism,
J. Phys. Soc. Jpn 89, 083703 (2020), 10.7566/jpsj.89.083703

69. Victor Ukleev, Yuichi Yamasaki, Oleg Utesov, Kiyou Shibata, Naoya Kanazawa, Nicolas Jaouen, Yoshinori Tokura, Taka-hisa Arima,
Metastable solitonic states in the strained itinerant helimagnet FeGe,
Phys. Rev. B 102, 014416 (2020), 10.1103/physrevb.102.014416

68. 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,
High field isotropic phase and planar Hall effect in skyrmion-host Gd2PdSi3,
Phys. Rev. B 101, 220401(R) , 10.1103/PhysRevB.101.220401

67. N. D. Khanh, T. Nakajima, X. Z. Yu, S. Gao, K. Shibata, M. Hirschberger, Y. Yamasaki, H. Sagayama, H. Nakao, L. C. Peng, K. Nakajima, R. Takagi, T. Arima, Y. Tokura and S. Seki,
Nanometric square skyrmion lattice in a centrosymmetric tetragonal magnet,
Nature Nanotecnology 15, 444–449 (2020), 10.1038/s41565-020-0684-7

66. H. Masuda, H. Sakai, H. Takahashi, Y. Yamasaki, A. Nakao, T. Moyoshi, H. Nakao, Y. Murakami, T. Arima, and S. Ishiwata,
Field-induced spin reorientation in an antiferromagnetic Dirac material EuMnBi$_2$ revealed by neutron and resonant x-ray diffraction,
Phys. Rev. B, 10.1103/PhysRevB.101.174411

65. Daisuke Morikawa, Y. Yamasaki, Naoya Kanazawa, Tomoyuki Yokouchi, Yoshinori Tokura, and Taka-hisa Arima,
Determination of crystallographic chirality of MnSi thin film grown on Si (111) substrate,
Phys. Rev. Materials 4, 014407 (2020), 10.1103/PhysRevMaterials.4.014407

2019

64. Max Hirschberger, Taro Nakajima, Shang Gao, Licong Peng, Akiko Kikkawa, Takashi Kurumaji, Markus Kriener, Y. Yamasaki, Hajime Sagayama, Hironori Nakao, Kazuki Ohishi, Kazuhisa Kakurai, Yasujiro Taguchi, Xiuzhen Yu, Taka-hisa Arima & Yoshinori Tokura ,
Skyrmion phase and competing magnetic orders on a breathing kagomé lattice,
Nature Communication 10, 5831 (2019), 10.1038/s41467-019-13675-4

63. Takashi Kurumaji, Taro Nakajima, Max Hirschberger, Akiko Kikkawa, Y. Yamasaki, Hajime Sagayama, Hironori Nakao, Yasujiro Taguchi, Taka-hisa Arima, Yoshinori Tokura, Skyrmion lattice with a giant topological Hall effect in a frustrated triangular-lattice magnet,
Science 365, 914 (2019), 10.1126/science.aau0968

62. Masaharu Ito, Hidefumi Takahashi, Hideaki Sakai, Hajime Sagayama, Y. Yamasaki, Y. Yokoyama, Hiroyuki Setoyamag, Hiroki Wadati, Kanako Takahashi, Yoshihiro Kusano, Shintaro Ishiwata,
High pressure synthesis of quasi-one-dimensional GdFeO3-type perovskite PrCuO3 with nearly divalent Cu ions,
Chem. Commun. 55, 8931 (2019), 10.1039/C9CC04656A

61. V. Ukleev, Y. Yamasaki, D. Morikawa, K. Karube, K. Shibata, Y. Tokunaga, Y. Okamura, K. Amemiya, M. Valvidares, H. Nakao, Y. Taguchi, Y. Tokura, T. Arima,
Element-specific soft x-ray spectroscopy, scattering, and imaging studies of the skyrmion-hosting compound Co8Zn8Mn4,
Physical Review B. 99 [14] 144408 (2019), 10.1103/physrevb.99.144408

60. Y. Yokoyama, T. Arima, M. Okada, Y. Yamasaki,
Sparse Phase Retrieval Algorithm for Observing Isolated Magnetic Skyrmions by Coherent Soft X-ray Diffraction Imaging,
Journal of the Physical Society of Japan. 88 [2] 024009 (2019), 10.7566/jpsj.88.024009

2018

59. Hironori Nakao, Chihiro Tabata, Youichi Murakami, Y. Yamasaki, Hiroyuki Yamada, Sumio Ishihara, Masashi Kawasaki,
Charge disproportionation of Mn 3d and O 2p electronic states depending on strength of p−d hybridization in (LaMnO3)2(SrMnO3)2 superlattices,
Physical Review B. 98 [24] 245146 (2018), 10.1103/physrevb.98.245146

58. K. Takubo, K. Yamamoto, Y. Hirata, H. Wadati, T. Mizokawa, R. Sutarto, F. He, K. Ishii, Y. Yamasaki, H. Nakao, Y. Murakami, G. Matsuo, H. Ishii, M. Kobayashi, K. Kudo, and M. Nohara,, Commensurate versus incommensurate charge ordering near the superconducting dome in Ir1−xPtxTe2 revealed by resonant x-ray scattering, Phys. Rev. B 97, 205142 (2018), 10.1103/PhysRevB.97.205142

57. Y. Yokoyama, Y. Yamasaki, M. Taguchi, Y. Hirata, K. Takubo, J. Miyawaki, Y. Harada, D. Asakura, J. Fujioka, M. Nakamura, H. Daimon, M. Kawasaki, Y. Tokura, and H. Wadati,, Tensile-Strain-Dependent Spin States in Epitaxial LaCoO3 Thin Films,, Phys. Rev. Lett. 120, 206402 (2018), 10.1103/physrevlett.120.206402

56. K. Yamamoto, Y. Hirata, M. Horio, Y. Yokoyama, K. Takubo, M. Minohara, H. Kumigashira, Y. Yamasaki, H. Nakao, Y. Murakami, A. Fujimori, H. Wadati,, Thickness dependence and dimensionality effects on charge and magnetic orderings in La1/3Sr2/3FeO3 thin films,, Physical Review B. 97 [7] 075134 (2018), 10.1103/physrevb.97.075134

55. Victor Ukleev, Y. Yamasaki, Daisuke Morikawa, Naoya Kanazawa, Yoshihiro Okamura, Hironori Nakao, Yoshinori Tokura, Taka-hisa Arima, Coherent Resonant Soft X-ray Scattering Study of Magnetic Textures in FeGe, Quantum Beam Science. 2 [1] (2018) 3 , 10.3390/qubs2010003

2017

54. Y. Okamura, Y. Yamasaki, D. Morikawa, T. Honda, V. Ukleev, H. Nakao, Y. Murakami, K. Shibata, F. Kagawa, S. Seki, T. Arima, Y. Tokura, Emergence and magnetic-field variation of chiral-soliton lattice and skyrmion lattice in the strained helimagnet Cu2OSeO3. , Physical Review B. 96 [17], 174417 (2017), 10.1103/physrevb.96.174417

53. Takaaki Sudayama, Hironori Nakao, Y. Yamasaki, Youichi Murakami, Shinichiro Asai, Ryuji Okazaki, Yukio Yasui, Ichiro Terasaki, Spin State of Co3+ in LaCo1−xRhxO3 Studied Using X-ray Absorption Spectroscopy, Journal of the Physical Society of Japan. 86 [9] (2017) 094701 , 10.7566/jpsj.86.094701

52. R. Masuda, Y. Kaneko, Y. Yamasaki, Y. Tokura, and Y. Takahashi, Role of commensurability of spin order for optical magnetoelectric effect with electromagnons in multiferroic YMn2O5, Phys. Rev. B 96, 041117(R) (2017) , 10.1103/physrevb.96.041117

51. T. Osaka, H. Takahashi, H. Sagayama, Y. Yamasaki, and S. Ishiwata, High-pressure synthesis of an unusual antiferromagnetic metal CaCoO3 with GdFeO3-type perovskite structure, Phys. Rev. B 95, 224440 (2017), 10.1103/physrevb.95.224440

50. Y. Okamura, Y. Yamasaki, D. Morikawa, T. Honda, V. Ukleev, H. Nakao, Y. Murakami, K. Shibata, F. Kagawa, S. Seki, T. Arima, and Y. Tokura, Directional electric-field induced transformation from skyrmion lattice to distinct helices in multiferroic Cu2OSeO3, Phys. Rev. B 95, 184411 (2017), 10.1103/physrevb.95.184411

2016

49. 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,, Uniaxial pressure effects on spin-lattice coupled phase transitions in a geometrical frustrated magnet CuFeO2, Phys. Rev. B 94, 174402 (2016), 10.1103/PhysRevB.94.174402

48. Keisuke Tomiyasu, Syun-Ichi Koyama, Masanori Watahiki, Mika Sato, Kazuki Nishihara, Yuki Takahashi, Mitsugi Onodera, Kazuaki Iwasa, Tsutomu Nojima, Hiroyuki Nojiri, Jun Okamoto, Di-Jing Huang, Y. Yamasaki, Hironori Nakao, and Youichi Murakami,, Microscopic Examinations of Co Valences and Spin States in Electron-Doped LaCoO3, J. Phys. Soc. Jpn. 85, 094702 (2016), 10.7566/JPSJ.85.094702

48. Y. Yamasaki, J. Fujioka, H. Nakao, J. Okamoto, T. Sudayama, Y. Murakami, M. Nakamura, M. Kawasaki, T. Arima, and Y. Tokura, Surface freezing and bulk melting of orbital order in LaCoO3/LSAT(110) thin film, J. Phys. Soc. Jpn. 85, 023704 (2016), 10.7566/JPSJ.85.023704

47. Hidetoshi Masuda, Hideaki Sakai, Masashi Tokunaga, Y. Yamasaki, Atsushi Miyake, Junichi Shiogai, Shintaro Nakamura, Satoshi Awaji, Atsushi Tsukazaki, Hironori Nakao, Youichi Murakami, Taka-hisa Arima, Yoshinori Tokura, and Shintaro Ishiwata, Quantum Hall effect in a bulk antiferromagnet EuMnBi2 with magnetically confined two-dimensional Dirac fermions, Science Advances 2, e1501117 (2016), 10.1126/sciadv.1501117

2015

47. Y. Yamasaki, D. Morikawa, T. Honda, H. Nakao, Y. Murakami, N. Kanazawa, M. Kawasaki, T. Arima, and Y. Tokura, Dynamical Process of Skyrmion-Helical Magnetic Transformation in Chiral-Lattice Magnet FeGe as Probed by Small-Angle Resonant Soft X-ray Scattering, Phys. Rev. B 92, 220421(R) (2015), 10.1103/PhysRevB.92.220421

46. J. Fujioka, Y. Yamasaki, A. Doi, H. Nakao, R. Kumai, Y. Murakami, M. Nakamura, M. Kawasaki, T. Arima and Y. Tokura,, Strain-tunable spin-state ordering in thin film of perovskite LaCoO3,, Phys. Rev. B 92, 195115 (2015), 10.1103/PhysRevB.92.195115

45. H. Nakao, T. Sudayama, M. Kubota, J. Okamoto, Y. Yamasaki, Y. Murakami, H. Yamada, A. Sawa, and K. Iwasa, Magnetic and electronic states in (LaMnO3)2(SrMnO3)2 superlattice exhibiting a large negative magnetoresistance, Phys. Rev. B 92, 245104 (2015), 10.1103/PhysRevB.92.245104

44. Y. Nii, T. Nakajima, A. Kikkawa, Y. Yamasaki, K. Ohishi, J. Suzuki, Y. Taguchi, T. Arima, Y. Tokura and Y. Iwasa, Uniaxial stress control of skyrmion phase, Nature Communications 6, 8539 (2015), 10.1038/ncomms9539 (2015)

43. Taro Nakajima, Tadashi Machida, Hironori Kariya, Daiki Morohoshi, Y. Yamasaki, Hironori Nakao, Kazuto Hirata, Takashi Mochiku, Hiroyuki Takeya, Setsuo Mitsuda, and Hideaki Sakata, 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, Phys. Rev. B 91, 205125 (2015), 10.1103/PhysRevB.91.205125

42. Y. Yamasaki, H. Nakao, Y. Murakami, T. Nakajima, A. L. Sampietro, H. Ohsumi, M. Takata, T. Arima, and Y. Tokura, X-ray induced lock-in transition of cycloidal magnetic order in a multiferroic perovskite manganite, Phys. Rev. B 91, 100403(R) (2015), 10.1103/PhysRevB.91.100403

41. D. Okuyama, K. Shibuya, R. Kumai, T. Suzuki, Y. Yamasaki, H. Nakao, Y. Murakami, Y. Taguchi, Y. Tokura and T. Arima, X-ray study of metal-insulator transitions induced by W-doping and photoirradiation in VO2 films, Phys. Rev. B 91, 064101 (2015), 10.1103/PhysRevB.91.064101

2014

40. M. Kubota, H. Yamada, H. Nakao, J. Okamoto, Y. Yamasaki, A. Sawa and Y. Murakami, Magnetic and electronic properties of (LaMnO3)5(SrMnO3)5 superlattice revealed by resonant soft X-ray scattering, Jpn. J. Appl. Phys. 53 05FH07 (2014), 10.7567/JJAP.53.05FH07

39. Jun Okamoto, Hironori Nakao, Y. Yamasaki, Hiroki Wadati, Youichi Murakami, Masato Kubota, Kazumasa Horigane, Arata Tanaka and Kazuyoshi Yamada, Antiferromagnetic Order of the Co2+ High-Spin State with a Large Orbital Angular Momentum in La1.5Ca0.5CoO4, J. Phys. Soc. Jpn. 83, 044705 (2014), 10.7566/JPSJ.83.044705

38. H. Nakao, H. Yamada, A. Sawa, K. Iwasa, J. Okamoto, T. Sudayama, Y. Yamasaki, and Y. Murakami, Neutron magnetic scattering study in manganite thin film system, Solid State Communications 185, 18–20 (2014), 10.1016/j.ssc.2014.01.019