Zobrazeno 1 - 10
of 84
pro vyhledávání: '"Aichi Yamashita"'
Publikováno v:
Nuclear Materials and Energy, Vol 40, Iss , Pp 101709- (2024)
Polycrystalline specimens of copper oxide superconductors YBa2Cu3O7-δ(YBCO), Y0.39Sm0.30Eu0.31Ba2Cu3O7-δ(ME-REBCO), Y0.18La0.24Nd0.14Sm0.14Eu0.15Gd0.15Ba2Cu3O7-δ (HE-REBCO) were irradiated with 1 MeV-He ions at room temperature. Magnetization meas
Externí odkaz:
https://doaj.org/article/a699e7fec30644ca8d6ba0ea129737f0
Autor:
Yuto Watanabe, Hiroto Arima, Saori Kawaguchi‐Imada, Hirokazu Kadobayashi, Kenta Oka, Hidetomo Usui, Ryo Matsumoto, Yoshihiko Takano, Takeshi Kawahata, Chizuru Kawashima, Hiroki Takahashi, Aichi Yamashita, Yoshikazu Mizuguchi
Publikováno v:
Advanced Electronic Materials, Vol 10, Iss 8, Pp n/a-n/a (2024)
Abstract The study investigates the thermal expansion and superconducting properties of a CuAl2‐type (tetragonal) superconductor CoZr2 under high pressures. High‐pressure synchrotron X‐ray diffraction is performed in a pressure range of 2.9 GPa
Externí odkaz:
https://doaj.org/article/51b7fdb6b4f64a9ead312f9eaf1c1e62
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-10 (2023)
Abstract We report the first observation of bulk superconductivity of a η-carbide-type oxide Zr4Pd2O. The crystal structure and the superconducting properties were studied through synchrotron X-ray diffraction, magnetization, electrical resistivity,
Externí odkaz:
https://doaj.org/article/04af34d53f3f4f2dbe24d030dc24dd50
Autor:
Md. Riad Kasem, Yuki Nakahira, Hitoshi Yamaoka, Ryo Matsumoto, Aichi Yamashita, Hirofumi Ishii, Nozomu Hiraoka, Yoshihiko Takano, Yosuke Goto, Yoshikazu Mizuguchi
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-9 (2022)
Abstract High-entropy-alloy (HEA) superconductors are a new class of disordered superconductors. However, commonality of superconducting characteristics of HEA materials is unclear. Here, we have investigated the crystal and electronic structure, and
Externí odkaz:
https://doaj.org/article/536919c69cfb4d95915635d2ad6c5058
Autor:
Tsubasa Mitobe, Kazuhisa Hoshi, Md. Riad Kasem, Ryosuke Kiyama, Hidetomo Usui, Aichi Yamashita, Ryuji Higashinaka, Tatsuma D. Matsuda, Yuji Aoki, Takayoshi Katase, Yosuke Goto, Yoshikazu Mizuguchi
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-10 (2021)
Abstract We investigated the chemical pressure effects on structural and electronic properties of SnTe-based material using partial substitution of Sn by Ag0.5Bi0.5, which results in lattice shrinkage. For Sn1−2x (AgBi) x Te, single-phase polycryst
Externí odkaz:
https://doaj.org/article/405ee2dc299c4de5873b80f0e908fbef
Autor:
Aichi Yamashita, Yosuke Goto, Akira Miura, Chikako Moriyoshi, Yoshihiro Kuroiwa, Yoshikazu Mizuguchi
Publikováno v:
Materials Research Letters, Vol 9, Iss 9, Pp 366-372 (2021)
A metal chalcogenide (Ag,Pb,Bi)(S,Se,Te) with an NaCl-type structure was designed by multi-site-type high-entropy alloying (MST-HEA), and the thermoelectric properties were investigated. In this material, both cation and anion sites were alloyed and
Externí odkaz:
https://doaj.org/article/a6dec445bc114a138c0811d729affcd0
Autor:
Aichi Yamashita, Hidetomo Usui, Kazuhisa Hoshi, Yosuke Goto, Kazuhiko Kuroki, Yoshikazu Mizuguchi
Publikováno v:
Scientific Reports, Vol 11, Iss 1, Pp 1-7 (2021)
Abstract Investigation of isotope effects on superconducting transition temperature (T c) is one of the useful methods to examine whether electron–phonon interaction is essential for pairing mechanisms. The layered BiCh2-based (Ch: S, Se) supercond
Externí odkaz:
https://doaj.org/article/9d1d8423f05a41e4847d223cb2165a3b
Publikováno v:
Royal Society Open Science, Vol 9, Iss 3 (2022)
REBa2Cu3O7-δ (RE123, RE: rare earth) is one of the high-temperature superconductors with a transition temperature (Tc) exceeding 90 K. Because of its high-Tc and large critical current density (Jc) under magnetic fields, RE123 superconductors have b
Externí odkaz:
https://doaj.org/article/7ff95d622c914a3280d4151c4e510a72
Autor:
Aichi Yamashita, Rajveer Jha, Yosuke Goto, Akira Miura, Chikako Moriyoshi, Yoshihiro Kuroiwa, Chizuru Kawashima, Kouhei Ishida, Hiroki Takahashi, Yoshikazu Mizuguchi
Publikováno v:
Scientific Reports, Vol 10, Iss 1, Pp 1-8 (2020)
Abstract Polycrystalline samples of Sr0.5 RE 0.5FBiS 2 (RE: La, Ce, Pr, Nd, and Sm) were synthesized via the solid-state reaction and characterized using synchrotron X-ray diffraction. Although all the Sr0.5 RE 0.5FBiS2 samples exhibited superconduct
Externí odkaz:
https://doaj.org/article/9aa12e50fa92491ea97015c2a51bddb3
Autor:
Fysol Ibna Abbas, Hiroto Arima, Md. Riad Kasem, Yuto Watanabe, Takumi Hasegawa, Chul-Ho Lee, Aichi Yamashita, Yoshikazu Mizuguchi
Publikováno v:
Applied Physics Express, Vol 17, Iss 1, p 013002 (2023)
BiCh _2 -based layered compounds have been extensively studied as potential thermoelectric and unconventional superconducting materials. For both functionalities, in-plane chemical pressure effects improve their thermoelectric or superconducting prop
Externí odkaz:
https://doaj.org/article/a3018425d3b44aaa81a534a539e7a46d