Zobrazeno 1 - 10
of 577
pro vyhledávání: '"Koki Takanashi"'
Autor:
Hidetoshi Masuda, Takeshi Seki, Jun-ichiro Ohe, Yoichi Nii, Hiroto Masuda, Koki Takanashi, Yoshinori Onose
Publikováno v:
Nature Communications, Vol 15, Iss 1, Pp 1-8 (2024)
Abstract Helimagnetic structures, in which the magnetic moments are spirally ordered, host an internal degree of freedom called chirality corresponding to the handedness of the helix. The chirality seems quite robust against disturbances and is there
Externí odkaz:
https://doaj.org/article/ff9973c955f64f88840b52b06933dc4b
Autor:
Atsufumi Hirohata, David C. Lloyd, Takahide Kubota, Takeshi Seki, Koki Takanashi, Hiroaki Sukegawa, Zhenchao Wen, Seiji Mitani, Hiroki Koizumi
Publikováno v:
IEEE Access, Vol 11, Pp 117443-117459 (2023)
Spintronic devices are expected to replace the recent nanoelectronic memories and sensors due to their efficiency in energy consumption and functionality with scalability. To date, spintronic devices, namely magnetoresistive junctions, employ ferroma
Externí odkaz:
https://doaj.org/article/efedf8a4044a4baab293205a12d3fb4f
Autor:
Rajkumar Modak, Yuya Sakuraba, Takamasa Hirai, Takashi Yagi, Hossein Sepehri-Amin, Weinan Zhou, Hiroto Masuda, Takeshi Seki, Koki Takanashi, Tadakatsu Ohkubo, Ken-ichi Uchida
Publikováno v:
Science and Technology of Advanced Materials, Vol 23, Iss 1, Pp 767-782 (2022)
Transverse thermoelectric generation using magnetic materials is essential to develop active thermal engineering technologies, for which the improvements of not only the thermoelectric output but also applicability and versatility are required. In th
Externí odkaz:
https://doaj.org/article/6b16cbcc3b2c4023b5a8b41c5e7f2b2c
Autor:
Iduru Shigeta, Shuta Oku, Takahide Kubota, Shojiro Kimura, Takeshi Seki, Bunju Shinozaki, Satoshi Awaji, Koki Takanashi, Masahiko Hiroi
Publikováno v:
AIP Advances, Vol 13, Iss 2, Pp 025116-025116-5 (2023)
Superconducting properties were investigated in epitaxially layered films consisting of superconductor NbN and half-metallic Heusler alloy Co2MnSi (CMS). Temperature dependence of the electrical resistivity ρ(T) was measured by applying perpendicula
Externí odkaz:
https://doaj.org/article/317e32d9f922404ebbc2cc9f516cf202
Publikováno v:
AIP Advances, Vol 13, Iss 2, Pp 025243-025243-6 (2023)
Anomalous Nernst effect of epitaxial Fe4−xNixN films on MgAl2O4(001) substrates was characterized. The Ni/Fe ratio (x) in Fe4−xNixN films was changed in the range of 0 ≤ x ≤ 2.8, and the Fe4−xNixN phase started to decompose into FeNi at abo
Externí odkaz:
https://doaj.org/article/fa977be1ca7e46bf884681706a9369a2
Autor:
Kelvin Elphick, William Frost, Marjan Samiepour, Takahide Kubota, Koki Takanashi, Hiroaki Sukegawa, Seiji Mitani, Atsufumi Hirohata
Publikováno v:
Science and Technology of Advanced Materials, Vol 22, Iss 1, Pp 235-271 (2021)
Heusler alloys are theoretically predicted to become half-metals at room temperature (RT). The advantages of using these alloys are good lattice matching with major substrates, high Curie temperature above RT and intermetallic controllability for spi
Externí odkaz:
https://doaj.org/article/142bb71960bc46c98ad4f45a8f4a2569
Autor:
Kohei Fujiwara, Yasuyuki Kato, Takeshi Seki, Kentaro Nomura, Koki Takanashi, Yukitoshi Motome, Atsushi Tsukazaki
Publikováno v:
Communications Materials, Vol 2, Iss 1, Pp 1-7 (2021)
Magnetic skyrmions are swirling topological spin textures induced by chiral interactions in non-centrosymmetric systems. Here, a Pt-Fe3Sn bilayer exhibits a thickness-dependent magnetic anisotropy and interfacial Dzyaloshinskii-Moriya interaction tha
Externí odkaz:
https://doaj.org/article/d57685ee78e24a228031992f6467cb94
Autor:
Junya Ikeda, Kohei Fujiwara, Junichi Shiogai, Takeshi Seki, Kentaro Nomura, Koki Takanashi, Atsushi Tsukazaki
Publikováno v:
Communications Physics, Vol 4, Iss 1, Pp 1-6 (2021)
Magnetic Weyl semimetals, such as Co3Sn2S2, are ideal to realise anomalous transport properties based on the Berry curvature in the specific electronic bands and are expected to be useful for topological spintronics. Here, the authors investigate the
Externí odkaz:
https://doaj.org/article/8eaa9dfd34f248e582d4f93a6dd06b96
Autor:
Junya Ikeda, Kohei Fujiwara, Junichi Shiogai, Takeshi Seki, Kentaro Nomura, Koki Takanashi, Atsushi Tsukazaki
Publikováno v:
Communications Materials, Vol 2, Iss 1, Pp 1-7 (2021)
The coexistence of ferromagnetism and topology has recently attracted intense interest. Here, the thickness dependence of magnetisation and anomalous Hall conductivity is investigated in Co3Sn2S2 thin films, revealing a critical thickness of 10 nm fo
Externí odkaz:
https://doaj.org/article/67d742ba0ff84088806b953080b24c36
Autor:
Hiroto Masuda, Rajkumar Modak, Takeshi Seki, Ken-ichi Uchida, Yong-Chang Lau, Junsaku Nitta, Koki Takanashi
Publikováno v:
AIP Advances, Vol 11, Iss 9, Pp 095221-095221-5 (2021)
Non-equilibrium Cu–Ir binary alloys are interesting materials because these alloys show a large spin Hall effect (SHE) despite the non-remarkable spin Hall angles of pure Cu and pure Ir. In this study, the temperature dependence of the SHE on a non
Externí odkaz:
https://doaj.org/article/7777dc6bfdab43b7874738de5b3d0784