Faculty Profiles - TANIYAMA Tomoyasu

Papers - TANIYAMA Tomoyasu

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Electric field enhancement of the superconducting spin-valve effect via strain-transfer across a ferromagnetic/ferroelectric interface Reviewed

T. Kikuta, S. Komori, K. Imura, and T. Taniyama

APL Materials Vol. 12 ( 7 ) page： 071115-1 - 071115-5 2024.7

Fe/FeRh薄膜ヘテロ構造における磁気相転移誘起磁気異方性 Invited Reviewed

谷山智康, 小森祥央

まぐね Vol. 19 ( 3 ) page： 114 - 119 2024.6

Y3Fe5O12 film with multi-domain epitaxy on single-crystalline LiNbO3 substrate Reviewed

K. Yamanoi, K. Hase, S. Komori, T. Taniyama, and Yukio Nozaki

APL Materials Vol. 12 page： 021130 2024.2

Superconducting properties of bismuthate/manganite epitaxial multilayers Reviewed

S. Komori and T. Taniyama

Superconductor Science and Technology Vol. 37 page： 035018 2024.2

Artificial multiferroic heterostructures - electric field effects and their perspectives Invited Reviewed

T. Taniyama, Y. Gohda, K. Hamaya, and T. Kimura

Science and Technology of Advanced Materials 2024

Variation of Gilbert damping constant via interface induced magnetic anisotropy in LSMO/PMN-PT heterostructures Reviewed International coauthorship

A. Das, Mrinalini, T. Usami, S. P. Pati, S. Komori, T. Taniyama, V. Gorige

Journal of Alloys and Compounds 2024

Epitaxial Co2FeSi/LiNbO3 multiferroic heterostructures with a low damping constant Reviewed

Shinya Yamada, Takamasa Usami, Sachio Komori, Sekai Nagata, Yukio Nozaki, Tomoyasu Taniyama, Kohei Hamaya

INTERMAG Short Papers 2023.9

Electric field modulation of spin-flop behaviors in Co/Ru/Co/PMN-PT(011) artificial multiferroic heterostructures Reviewed

Y Hisada, S Komori, K Imura, T Taniyama

INTERMAG Short Papers 2023.9

Antiferromagnetic ordering and signatures of enhanced spin-frustration in honeycomb-layered tellurates with Ag bilayers Invited Reviewed

Sachio Komori, Kohei Tada, Noboru Taguchi, Tomoyasu Taniyama, Titus Masese

Journal of Materials Chemistry C Vol. 11 ( 33 ) page： 11213 - 11217 2023.8

Spin current driven by ultrafast magnetization of FeRh Reviewed International coauthorship

Kyuhwe Kang, Hiroki Omura, Daniel Yesudas, OukJae Lee, Kyung-Jin Lee, Hyun-Woo Lee, Tomoyasu Taniyama, Gyung-Min Choi

Nature Communications Vol. 14 ( 1 ) page： 3619 2023.6

Controllable perpendicular magnetic anisotropy in Fe/Fe100-xRhx heterostructures probed by ferromagnetic resonance Reviewed

Physical Review Applied Vol. 19 ( 6 ) page： 064077 2023.6

Interlayer coupling-dependent magnetoelastic response in synthetic antiferromagnets Reviewed

Yuichi Hisada, Sachio Komori, Keiichiro Imura, Tomoyasu Taniyama

Applied Physics Letters Vol. 122 ( 20 ) page： 202402 2023.5

Enhanced magnetic modulation at a border of magnetic ordering in La1−xSrxMnO3/BaTiO3(100) heterostructure Reviewed

Keiichiro Imura, Shota Ishikawa, Sachio Komori, Tomoyasu Taniyama

Applied Physics Letters Vol. 122 ( 20 ) page： 202402 2023.5

Electric and magnetic tuning of Gilbert damping constant in LSMO/PMN-PT(011) heterostructure Reviewed International coauthorship

Avisek Das, Mrinalini, Takamasa Usami, Satya Prakash Pati, Tomoyasu Taniyama, Venkataiah Gorige

Journal of Physics: Condensed Matter Vol. 35 ( 28 ) page： 285801 2023.4

Emergence of quasi two-Dimensional electronic states at the interface of LSMO/STO via lattice mismatch-induced strains Reviewed

S. P. Pati, T. Usami, S. Komori, and T. Taniyama

ACS Appl. Electronic Mater. Vol. 4 page： 4748 - 4754 2022.8

Zero-field routing of spin waves in a multiferroic heterostructure Reviewed International journal

Weijia Zhu, Huajun Qin, Lukáš Flajšman, Tomoyasu Taniyama, Sebastiaan van Dijken

App. Phys. Lett. Vol. 120 ( 11 ) page： 112407 - 112407 2022.3

Language：English Publishing type：Research paper (scientific journal) Publisher：AIP Publishing

We report zero-field routing of spin waves in a multiferroic heterostructure comprising a ferromagnetic Fe film and a ferroelectric BaTiO3 substrate with fully correlated strain-coupled domains. In the Fe film, a regular alternation of magnetic anisotropy produces a back-and-forth rotation of uniform magnetization in zero magnetic field. Spin waves propagating across this domain structure are refracted at the magnetic domain walls because of abrupt changes in the dispersion relation and phase velocity. Using super-Nyquist sampling magneto-optical Kerr effect microscopy, we image the routing of spin waves and analyze the dependence of the effect on frequency and the propagation direction. We find that spin waves are routed efficiently by angles up to 60° without measurable loss in amplitude. The experimental results are reproduced by micromagnetic simulations and calculations based on the modified Snell's law for magnonics.

DOI： 10.1063/5.0086430

Recent Progress in Research on Interfacial Multiferroic Structures Invited Reviewed

Tomoyasu Taniyama

Magnetics Japan Vol. 17 ( 1 ) page： 35 - 41 2022.2

Optical selection rules of the magnetic excitation in the S=12 one-dimensional Ising-like antiferromagnet BaCo2V2O8 Reviewed International journal

Shojiro Kimura, Hiroaki Onishi, Akira Okutani, Mitsuru Akaki, Yasuo Narumi, Masayuki Hagiwara, Kouichi Okunishi, Koichi Kindo, Zhangzhen He, Tomoyasu Taniyama, Mitsuru Itoh

Phys. Rev. B Vol. 105 ( 1 ) page： 014417 2022.1

Electric‐Field Control of Propagating Spin Waves by Ferroelectric Domain‐Wall Motion in a Multiferroic Heterostructure Reviewed International journal

Huajun Qin, Rouven Dreyer, Georg Woltersdorf, Tomoyasu Taniyama, Sebastiaan van Dijken

Adv. Mater. Vol. 33 ( 27 ) page： 2100646 - 2100646 2021.7

Manipulation of Perpendicular Magnetic Anisotropy by Interfacial Strain: Development of Orbital Elastic Effect by Electric-Field Induced XMCD Reviewed International journal

Jun OKABAYASHI, Yoshio MIURA, Tomoyasu TANIYAMA

Vacuum and Surface Science Vol. 64 ( 5 ) page： 230 - 235 2021.5

Ferromagnetic phase nucleation and its growth evolution in FeRh thin films Reviewed International journal

A. S. Komlev, D. Y. Karpenkov, D. A. Kiselev, T. S. Ilina, A. Chirkova, R. R. Gimaev, T. Usami, T. Taniyama, V. I. Zverev, N. S. Perov

J. Alloys and Comp. Vol. 874 page： 159924 2021.4

Temperature dependence of the effective Gilbert damping constant of FeRh thin films Reviewed International journal

T. Usami, M. Itoh, T. Taniyama

AIP Advances Vol. 11 ( 4 ) page： 045302 - 045302 2021.4

Shear-strain-mediated large nonvolatile tuning of ferromagnetic resonance by electric field in multiferroic heterostructures Reviewed

M. Zheng, T. Usami, T. Taniyama

NPG Asia Mater. Vol. 13 page： 7 2021.1

Electric-field tunable anisotropic magnetoresistance effect in an epitaxial Co2FeSi/BaTiO3 interfacial multiferroic system Reviewed

S. Yamada, Y. Teramoto, D. Matsumi, D. Kepaptsoglou, I. Azaceta, T. Murata, K. Kudo, V. K. Lazarov, T. Taniyama, K. Hamaya

Phys. Rev. Mater. Vol. 5 ( 1 ) page： 014412 2021.1

In-plane ferroelectricity and enhanced Curie temperature in perovskite BaTiO3 epitaxial thin films Reviewed

K. Komatsu, I. Suzuki, T. Aoki, Y. Hamasaki, S. Yasui, M. Itoh, T. Taniyama

Appl. Phys. Lett. Vol. 117 ( 7 ) page： 072902 2020.8

Epitaxial strain engineering of luminescent properties in ZnGa2O4:Mn thin films Reviewed

T. Dazai, S. Yasui, T. Taniyama, M. Itoh

Appl. Phys. Express Vol. 13 ( 8 ) page： 082004 2020.7

Bandgap tuning and optimization of green-emitting Zn2SnO4-Mg2SnO4:Mn2+ using combinatorial pulsed laser deposition Reviewed

T. Dazai, S. Yasui, T. Taniyama, M. Itoh

Ceram. Int. Vol. 46 ( 13 ) page： 21771 - 21774 2020.5

Switchable third ScFeO3 polar ferromagnet with YMnO3-type structure Reviewed

Y. Hamasaki, T. Katayama, S. Yasui, T. Shiraishi, A. Akama, T. Kiguchi, T. Taniyama, and M. Itoh

J. Mater. Chem. C Vol. 8 page： 4447 - 4452 2020.4

The effects of BaTiO<inf>3</inf> nanodots density support on epitaxial LiCoO<inf>2</inf> thin-film for high-speed rechargeability Reviewed International journal

Sou Yasuhara, Shintaro Yasui, Takashi Teranishi, Yumi Yoshikawa, Tomoyasu Taniyama, Mitsuru Itoh

Electrochem. Commun. Vol. 109 page： 106604 2019.12

Language：English Publishing type：Research paper (scientific journal)

© 2019 The Authors LiCoO2 (LCO) is one of the most promising cathode materials for Li ion batteries (LIBs). However, LCO shows a rate-limiting step of Li+ migration between electrode and electrolyte interfaces, requiring LIBs to be charged under low-current conditions. For next generation batteries, it will be necessary to meet the demand for a shorter charging-time. We investigated a support method for the LCO surface to improve high C-rate performance, and revealed that the Li+ intercalation/de-intercalation reaction into/from LCO was accelerated by the introduction of a BaTiO3-LCO-electrolyte interface (triple-phase interface; TPI), due to the electric field concentration near the TPI. In this report, we investigate the dependence of high C-rate performance on the density of surface BaTiO3 nanodots using epitaxial LiCoO2 thin films created via pulsed laser deposition (PLD). As the number of nanodots increased, so did discharge capacity at 50C, becoming saturated at surface coverage over 22%. However, at 100C, the discharge capacity decreased at surface coverage over 40%. These results indicate that coalescence of nanodots reduces not only the TPI length but also the electrochemically active range at quite high C-rate. Therefore, we infer that optimal surface coverage should be varied depending on the C-rate.

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Papers - TANIYAMA Tomoyasu