Zobrazeno 1 - 10
of 294
pro vyhledávání: '"Okamoto, Yoshihiko"'
Autor:
Okamoto, Yoshihiko
Publikováno v:
J. Phys. Soc. Jpn. 93, 111006(1-16) (2024)
In this review, I present the electronic properties of the beta-pyrochlore oxide CsW2O6 and other related materials. At 215 K, CsW2O6 exhibits an electronic phase transition to a nonmagnetic insulating state, which exhibits a complex self-organizatio
Externí odkaz:
http://arxiv.org/abs/2406.13981
Autor:
Matsumoto, Haruka, Yamakawa, Youichi, Okuma, Ryutaro, Nishio-Hamane, Daisuke, Okamoto, Yoshihiko
Publikováno v:
J. Phys. Soc. Jpn. 93, 023705 (2024)
We report the synthesis, electronic properties, and electronic states of Zr6MTe2 (M = Cr, Mn, Fe, and Co), which is isostructural to a recently discovered superconductor family Sc6MTe2. Based on the electrical resistivity and heat capacity data measu
Externí odkaz:
http://arxiv.org/abs/2401.04870
Autor:
Shinoda, Yusaku, Okamoto, Yoshihiko, Yamakawa, Youichi, Takatsu, Hiroshi, Kageyama, Hiroshi, Hirai, Daigorou, Takenaka, Koshi
Publikováno v:
J. Phys. Soc. Jpn. 93, 023701 (2024)
The electronic properties of ScPdGe and ScPdSi, crystallizing in the hexagonal ZrNiAl and orthorhombic TiNiSi structures, respectively, are investigated. ScPdGe and ScPdSi are found to show bulk superconductivity below 0.9 and 1.7 K, respectively, ba
Externí odkaz:
http://arxiv.org/abs/2312.06045
Autor:
Matsunaga, Fumiya, Okamoto, Yoshihiko, Yokoyama, Yasunori, Takehana, Kanji, Imanaka, Yasutaka, Nakamura, Yuto, Kishida, Hideo, Kawano, Shoya, Matsuhira, Kazuyuki, Takenaka, Koshi
Publikováno v:
Phys. Rev. B, 109, L161105(1-6) (2024)
We investigated the optical properties of single crystals of one-dimensional telluride Ta4SiTe4, which shows high thermoelectric performance below room temperature. Optical conductivity estimated from reflectivity spectra indicates the presence of a
Externí odkaz:
http://arxiv.org/abs/2311.13031
Autor:
Eto, Koki, Okamoto, Yoshihiko, Katayama, Naoyuki, Ishikawa, Hajime, Kindo, Koichi, Takenaka, Koshi
Publikováno v:
J. Phys. Soc. Jpn. 92, 094707 (2023)
NaPrTe2, NaNdTe2, and NaTbTe2 are found to be triangular lattice magnets with the alpha-NaFeO2 structure, where lanthanoid atoms with 4f electrons form a triangular lattice, based on the structural analysis and physical property measurements of synth
Externí odkaz:
http://arxiv.org/abs/2307.06516
Autor:
Shinoda, Yusaku, Okamoto, Yoshihiko, Yamakawa, Youichi, Matsumoto, Haruka, Hirai, Daigorou, Takenaka, Koshi
Publikováno v:
J. Phys. Soc. Jpn. 92, 103701 (2023)
We report the discovery of bulk superconductivity in Sc6MTe2 with seven kinds of transition-metal elements M. The critical temperatures for M = 3d elements are higher than those for 4d and 5d elements and increase in the order of M = Ni, Co, and Fe w
Externí odkaz:
http://arxiv.org/abs/2304.01444
Autor:
Tanaka, Yu, Wawrzyńczak, Rafał, Le, Manh Duc, Guidi, Tatiana, Okamoto, Yoshihiko, Yajima, Takeshi, Hiroi, Zenji, Takigawa, Masashi, Nilsen, Gøran J.
Publikováno v:
J. Phys. Soc. Jpn. 87, 073710 (2018)
The A-site ordered chromate spinels LiGa1-xInxCr4O8 host a network of size-alternating spin-3/2 Cr3+ tetrahedra known as a 'breathing' pyrochlore lattice. For the x=0.05 composition, the complex magneto-structural ordering observed in the parent x=0
Externí odkaz:
http://arxiv.org/abs/2301.05064
Autor:
Kubota, Yuki, Okamoto, Yoshihiko, Kanematsu, Tomoya, Yajima, Takeshi, Hirai, Daigorou, Takenaka, Koshi
Publikováno v:
Appl. Phys. Lett. 122, 042404(1-6) (2023)
Sintered samples of Cr3Te4 and Cr2Te3 are found to show large strains accompanied by large volume changes under a magnetic field. In Cr3Te4, volume increases of deltaV/V = 500-1170 ppm by applying a magnetic field of 9 T are observed over the entire
Externí odkaz:
http://arxiv.org/abs/2211.13388
Publikováno v:
J. Phys. Soc. Jpn. 91, 125002 (2022)
The electrical resistivity, magnetic susceptibility, and heat capacity of sintered samples of Ca2Ir2O7, in which pentavalent Ir atoms with 5d4 electron configuration form a pyrochlore structure, have been studied. The obtained experimental data stron
Externí odkaz:
http://arxiv.org/abs/2211.09290
Publikováno v:
J. Phys. Soc. Jpn. 91, 023710 (2022)
Sintered samples of a spinel oxide LiFeCr4O8, where Cr3+ and Fe3+ ions have localized moments, were found to show a large magnetic-field-induced volume increase approaching 500 ppm by applying a magnetic field of 9 T. This large volume increase appea
Externí odkaz:
http://arxiv.org/abs/2201.01897