Zobrazeno 1 - 10
of 137
pro vyhledávání: '"Shinobu Ohya"'
Publikováno v:
APL Materials, Vol 11, Iss 11, Pp 111114-111114-7 (2023)
Employing Korringa–Kohn–Rostoker Green’s function methodology, our investigation elucidates the previously obscure origins of the anomalous temperature-dependent electrical resistivity behavior of (Ga,Mn)As ferromagnetic semiconductors. Phonon
Externí odkaz:
https://doaj.org/article/edc6d599faf54042a56023b08aaddfc3
Autor:
Shingo Kaneta-Takada, Yuki K. Wakabayashi, Yoshiharu Krockenberger, Toshihiro Nomura, Yoshimitsu Kohama, Sergey A. Nikolaev, Hena Das, Hiroshi Irie, Kosuke Takiguchi, Shinobu Ohya, Masaaki Tanaka, Yoshitaka Taniyasu, Hideki Yamamoto
Publikováno v:
npj Quantum Materials, Vol 7, Iss 1, Pp 1-12 (2022)
Abstract High-mobility two-dimensional carriers originating from surface Fermi arcs in magnetic Weyl semimetals are highly desired for accessing exotic quantum transport phenomena and for topological electronics applications. Here, we demonstrate hig
Externí odkaz:
https://doaj.org/article/543a00274e01498294525e5a1b30f552
Autor:
Shingo Kaneta-Takada, Miho Kitamura, Shoma Arai, Takuma Arai, Ryo Okano, Le Duc Anh, Tatsuro Endo, Koji Horiba, Hiroshi Kumigashira, Masaki Kobayashi, Munetoshi Seki, Hitoshi Tabata, Masaaki Tanaka, Shinobu Ohya
Publikováno v:
Nature Communications, Vol 13, Iss 1, Pp 1-8 (2022)
The interface between perovskite-oxide SrTiO3 and other oxides realizes efficient spin-to-charge current conversion; however, the typically insulating oxides hinder the propagation of spin-currents. Here the authors achieve a record efficiency by rep
Externí odkaz:
https://doaj.org/article/69f4a373d1f64465baf9a12f229baab3
Publikováno v:
Advanced Science, Vol 10, Iss 24, Pp n/a-n/a (2023)
Abstract To achieve a desirable magnitude of spin–orbit torque (SOT) for magnetization switching and realize multifunctional spin logic and memory devices utilizing SOT, controlling the SOT manipulation is vitally important. In conventional SOT bil
Externí odkaz:
https://doaj.org/article/b7aa134a15964ab3b917031a0da15fe0
Publikováno v:
AIP Advances, Vol 11, Iss 12, Pp 125029-125029-6 (2021)
In conventional magnetic tunnel junctions (MTJs), the tunnel magnetoresistance (TMR) monotonically decreases with increasing bias voltage, which limits the bias voltage range for the operation of MTJs. In our study, using double-barrier MTJs composed
Externí odkaz:
https://doaj.org/article/5548898db45841f39a890ef8108e298f
Spin–orbit torque magnetization switching in a perpendicularly magnetized full Heusler alloy Co2FeSi
Autor:
Miao Jiang, Eisuke Matsushita, Yota Takamura, Le Duc Anh, Shigeki Nakagawa, Shinobu Ohya, Masaaki Tanaka
Publikováno v:
AIP Advances, Vol 11, Iss 11, Pp 115014-115014-7 (2021)
To optimize the writing and reading performance of magnetic random-access memory (MRAM) devices, achieving current-induced spin–orbit torque (SOT) magnetization switching in perpendicularly magnetized full Heusler alloys is vitally important. For c
Externí odkaz:
https://doaj.org/article/77d082f899684347a5aeb6073d928745
Autor:
Miao Jiang, Hirokatsu Asahara, Shoichi Sato, Toshiki Kanaki, Hiroki Yamasaki, Shinobu Ohya, Masaaki Tanaka
Publikováno v:
Nature Communications, Vol 10, Iss 1, Pp 1-6 (2019)
Spin orbit torque enables an innovative method of manipulating the magnetization of ferromagnets by current injection. Here, Jiang et al. demonstrate efficient full spin–orbit torque switching with an activation current density of ∼3.4 × 105 A c
Externí odkaz:
https://doaj.org/article/eac3814c1dbb49559749a9dfc2dee658
Autor:
Yuki K. Wakabayashi, Shingo Kaneta-Takada, Yoshiharu Krockenberger, Kosuke Takiguchi, Shinobu Ohya, Masaaki Tanaka, Yoshitaka Taniyasu, Hideki Yamamoto
Publikováno v:
AIP Advances, Vol 11, Iss 3, Pp 035226-035226-7 (2021)
We investigate structural and transport properties of highly Ru-deficient SrRu0.7O3 thin films prepared by molecular beam epitaxy on (001) SrTiO3 substrates. To distinguish the influence of the two types of disorders in the films—Ru vacancies withi
Externí odkaz:
https://doaj.org/article/118d391d01844bb7a794a5d0dc21a9ba
Autor:
Ye Du, Shoma Arai, Shingo Kaneta-Takada, Le Duc Anh, Shutaro Karube, Makoto Kohda, Shinobu Ohya, Junsaku Nitta
Publikováno v:
AIP Advances, Vol 10, Iss 10, Pp 105010-105010-6 (2020)
We demonstrate room-temperature perpendicular magnetic anisotropy (PMA) in Pt/Co/AlOx trilayers sputter-deposited onto a SrTiO3 (STO) (001) substrate. Reflection high-energy electron diffraction and x-ray diffraction results confirm the two-dimension
Externí odkaz:
https://doaj.org/article/eadb41ef9a614d43a05106b404948847
Publikováno v:
AIP Advances, Vol 10, Iss 8, Pp 085115-085115-5 (2020)
We report large tunnel magnetoresistance (TMR) ratios of up to 219% at 300 K and 366% at 3.7 K obtained for a high-quality fully epitaxial double-barrier magnetic tunnel junction (MTJ) composed of Fe/MgO/Fe/γ-Al2O3/Nb-doped SrTiO3. The obtained TMR
Externí odkaz:
https://doaj.org/article/8fa2ee8190234aea9e9034a7aa72d282