スペクトル化学研究センター
Recent publications

135.
Understanding voltage‑controlled magnetic anisotropy effect at Co/oxide interface
Tomohiro Nozaki, Jun Okabayashi, Shingo Tamaru, Makoto Konoto, Takayuki Nozaki, and Shinji Yuasa
Sci. Rep. 13, 10640 (2023)




134.
Perpendicular Magnetic Anisotropy of an Ultrathin Fe Layer Grown on NiO(001)
Soki Kobayashi, Hiroki Koizumi, Hideto Yanagihara, Jun Okabayashi, Takahiro Kondo, Takahide Kubota, Koki Takanashi, and Yoshiaki Sonobe
Phys. Rev. Appl. 19, 064005 (2023)




133.
Control of conductivity in Fe-rich cobalt-ferrite thin films with perpendicular magnetic anisotropy
Masaya Morishita, Tomoyuki Ichikawa, Masaaki A. Tanaka, Motoharu Furuta, Daisuke Mashimo, Syuta Honda, Jun Okabayashi, and Ko Mibu
Phys. Rev. Mater. 7, 054402 (2023)




132.
Tracing magnetic atom diffusion with annealing at the interface between CoMn alloy and MnGa layer by X-ray magnetic circular dichroism
Jun Okabayashi*, Kazuya Z. Suzuki, and Shigemi Mizukami
J. Magn. Magn. Mater. 564, 170163 (2022)




131.
Understanding magnetocrystalline anisotropy based on orbital and quadrupole moments (Topical Review)
Yoshio Miura and Jun Okabayashi
J. Phys.: Condens. Matter 34 473001 (2022)




130.
Origin of Perpendicular Magnetic Anisotropy in CoxFe3−xO4+δ Thin Films Studied by X-ray Magnetic Circular and Linear Dichroisms
J. Okabayashi, M.A. Tanaka, M. Morishita, H. Yanagihara, and K. Mibu
Phys. Rev. B. 105, 134416 (2022).




129.
Structure and magnetism in metastable bcc Co1-xMnx epitaxial films
Kazuma Kunimatsu, Tufan Roy, Jun Okabayashi, Tomoki Tsuchiya, Tomohiro Ichinose, Masahito Tsujikawa, Masafumi Shirai, Shigemi Mizukami
J. Magn. Magn. Mater. 548, 168841 (2022).




128.
Mössbauer spectroscopy with polarized synchrotron beams at Fe/Au (111) interface
Jun Okabayashi· Songtian Li· Seiji Sakai· Yasuhiro Kobayashi· Kosuke Fujiwara·Takaya Mitsui· Seiji Mitani
Hyperfine Interactions 242, 59 (2021).




127.
Element-specific magnetic properties of compensated ferrimagnet
Mn2Co1-xVxAl Heusler alloy films
Tomoki Tsuchiya, Jun Okabayashi*, and Shigemi Mizukami
J. Magn. Magn. Mater. 540, 168437 (2021).




126.
Element-Specific Spin States in Heusler-Alloy Compounds Probed by X-Ray Magnetic Spectroscopy
Jun Okabayashi, Kazuya Z. Suzuki, and Shigemi Mizukami
Progress in Photon Science K. Yamanouchi ed. Springer, p.169-199 (31 pages) 2021.




125.
57Fe-Mossbauer and XAFS Studies of Conductive Sodium Phospho-Vanadate Glass as a Cathode Active Material for Na-ion Batteries with Large Capacity
S. Kubuki, K. Osouda, A.S. Ali, I. Khan, B. Zhang, A. Kitajou, S. Okada, J. Okabayashi, Z. Homonnay, E. Kuzmann, T. Nishida, L. Pavic, A. Santic, and A. Mogus-Milankovi
J. Non-Cryst. Solids 570, 120998 (2021).




124.
Perpendicular magnetic anisotropy at the Fe/Au(111) interface studied by Mössbauer, x-ray absorption, and photoemission spectroscopies
Jun Okabayashi, Songtian Li, Seiji Sakai, Yasuhiro Kobayashi, Takaya Mitsui, Kiyohisa Tanaka, Yoshio Miura, and Seiji Mitani
Phys. Rev. B 103, 104435 (2021).




123.
Large Inverse Tunnel Magnetoresistance in Magnetic Tunnel Junctions with an Fe3O4 Electrode
Shoma Yasui, Syuta Honda, Jun Okabayashi, Takashi Yanase, Toshihiro Shimada, and Taro Nagahama
Phys. Rev. Applied 15, 034042 (2021). プレスリリース（北大）




122.
Cyclic Heterometallic Interactions formed from a Flexible Tripeptide Complex Showing Effective Antiferromagnetic Spin Coupling
Ryosuke Miyake, Eri Suganuma, Shun Kimura, Hirotoshi Mori, Jun Okabayashi, and Tetsuro Kusamoto
Angew. Chem. Int. Ed. 2021, 60, 5179




121.
High tunnel magnetoresistance and magnetism in metastable bcc Co1−xMnx-based magnetic tunnel junctions
Kazuma Kunimatsu, Tufan Roy, Jun Okabayashi, Kelvin Elphick, Tomoki Tsuchiya, Tomohiro Ichinose, Masahito Tsujikawa, Atsufumi Hirohata, Masafumi Shirai, Shigemi Mizukami
Phys. Rev.




120.
Detecting quadrupole: a hidden source of magnetic anisotropy for Manganese alloys
Jun Okabayashi, Yoshio Miura, Yohei Kota, Kazuya Z. Suzuki, Akimasa Sakuma, and Shigemi Mizukami
Scientific Reports 10, 9744 (2020). プレスリリース




119.
Alternative Route Triggering Multistep Spin Crossover with Hysteresis in an Iron(II) Family Mediated by Flexible Anion Ordering
Hiroaki Hagiwara, Ryo Minoura, Taro Udagawa, Ko Mibu, and Jun Okabayashi
Inorg. Chem. 2020, 59, 9866−9880.




118.
Perpendicular orbital and quadrupole anisotropies at Fe/MgO interfaces detected by x-ray magnetic circular and linear dichroisms
J Okabayashi, Y Iida, Q Xiang, H Sukegawa, and S Mitani
Applied Physics Letters 115, 252402 1-5 (2019).




117.
Effect of tungsten doping on perpendicular magnetic anisotropy and its voltage effect in single crystal Fe/MgO (001) interfaces
Y Iida, Q Xiang, J Okabayashi, T Scheike, H Sukegawa, and S Mitani
Journal of Physics D: Applied Physics 53, 124001 1-5 (2020).




116.
Interfacial ferromagnetism and atomic structures in high-temperature grown Fe3O4/Pt/Fe3O4 epitaxial trilayers
Takashi Kikkawa, M Suzuki, Rafael Ramos, MH Aguirre, J Okabayashi, K Uchida, I Lucas, A Anadón, D Kikuchi, PA Algarabel, L Morellón, MR Ibarra, and E Saitoh
Journal of Applied Physics 126, 143903 1-9 (2019).




115.
Preparation of Hierarchically Assembled Silver Nanostructures based on the Morphologies of Crystalline Peptide‐Silver(I) Complexes
Ryosuke Miyake, Yukari Nitanai, Yuki Nakagawa, Junfei Xing, Koji Harano, Eiichi Nakamura, Jun Okabayashi, Takeo Minamikawa, Keirei Uruma, Katsuhiko Kanaizuka, and Masato Kurihara
ChemPlusChem 2019, 84, 295-301




114.
Magnetic tunnel junctions with a B2-ordered CoFeCrAl equiatomic Heusler alloy
Tomoki Tsuchiya, Tufan Roy, Kelvin Elphick, Jun Okabayashi, Lakhan Bainsla, Tomohiro Ichinose, Kazuya Suzuki, Masahito Tsujikawa, Masafumi Shirai, Atsufumi Hirohata, Shigemi Mizukami
Phys. Rev. Mater. 3, 084403 1-9 (2019).




113.
Strain-Induced Reversible Manipulation of Orbital Magnetic Moments in Ni/Cu Multilayers on Ferroelectric BaTiO3
Jun Okabayashi, Yoshio Miura, and Tomoyasu Taniyama
Nature Partner Journal npj Quantum Materials 4, 21 (2019). プレスリリース、日本経済新聞にも掲載 (2019/5/8)




112.
Tailoring Spins and Orbitals Probed by X-ray Magnetic Circular Dichroism
Jun Okabayashi
Progress in Photon Science II K. Yamanouchi ed. Springer, 471-492 (25 pages) 2019.




111.
Perpendicular magnetic anisotropy in sputter-deposited Fe/MgO interfaces tuned by W buffer and Tb capping layers
Yuki Iida, Jun Okabayashi, and Seiji Mitani, Applied Physics Letters, 113, 252401 (2018).




110.
Anatomy of interfacial spin-orbit coupling in Co/Pd multilayers, Jun Okabayashi, Yoshio Miura, and Hiro Munekata
Scientific Reports 8, 8303 (2018). プレスリリース、日本経済新聞にも掲載 (2018/5/30) 　




109.
Interfacial exchange coupling between transition metals and Mn1.5Ga studied by X-ray magnetic circular dichroism
Jun Okabayashi, Kazuya Z. Suzuki, Shigemi Mizukami, Journal of Magnetism and Magnetic Materials 460, 418 (2018).




108.
Local electronic and magnetic properties of ferro-orbital-ordered FeV2O4
Jun Okabayashi, Shigeki Miyasaka, Masashi Takahashi, and Setsuko Tajima, Japanese Journal of Applied Physics (Special Topics in Applied Physics) 57, 0902BD (2018).




107.
Structural and magnetic properties of epitaxial thin films of the equiatomic quaternary CoFeMnSi Heusler alloy
Lakhan Bainsla, Resul Yilgin, Jun Okabayashi, Atsuo Ono, Kazuya Suzuki, and Shigemi Mizukami, Physical Review B 96, 094404 (2017).




106.
Induced perpendicular magnetization in a Cu layer inserted between Co and Pt layers revealed by x-ray magnetic circular Dichroism
Jun Okabayashi, Tomohiro Koyama, Motohiro Suzuki, Masahito Tsujikawa, Masafumi Shirai, & Daichi Chiba, Scientific Reports 7, 46132 (2017). プレスリリース、日刊工業新聞、日経新聞に掲載(2017.4.14)




105.
Detection of induced paramagnetic moments in Pt on Y3Fe5O12 via x-ray magnetic circular dichroism
Takashi Kikkawa, Motohiro Suzuki, Jun Okabayashi, Ken-ichi Uchida,Daisuke Kikuchi,Zhiyong Qiu, and Eiji Saitoh, Phys. Rev. B 95, 214416 (2017).



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