421 citations · 1.2k across the 8 of their papers we have counts for
8 papers
Crystal structure instability of FeSe grains: Formation of non-superconducting phase at the grain surface
Hiroki Izawa, Yuji Tanaka, Yoshikazu Mizuguchi +1
We investigated the magnetization and crystal structure of FeSe polycrystalline samples with various grain sizes. For the samples with large grains, a large magnetic critical curre…
Pressure-induced Enhancement of Superconductivity in BiS-layered LaOFBiS
Takahiro Tomita, Masaya Ebata, Hideto Soeda +9
The newly discovered BiS-based LaOFBiS (=0.5) becomes superconductive at =2.5 K. Electrical resistivity and magnetization measurements are performed u…
Pressure Study of BiS2-Based Superconductors Bi4O4S3 and La(O,F)BiS2
Hisashi Kotegawa, Yusuke Tomita, Hideki Tou +6
We report the electrical resistivity measurements under pressure for the recently discovered BiS2-based layered superconductors Bi4O4S3 and La(O,F)BiS2. In Bi4O4S3, the transition…
Bulk superconductivity in Bi4O4S3 revealed by specific heat measurement
Hiroshi Takatsu, Yoshikazu Mizuguchi, Hiroki Izawa +2
Specific heat experiments on a well-characterized polycrystalline sample of the BiS2 based superconductor Bi4O4S3 revealed that it shows a crear specific heat anomaly at about Tc =…
Novel BiS2-based layered superconductor Bi4O4S3
Yoshikazu Mizuguchi, Hiroshi Fujihisa, Yoshito Gotoh +7
Exotic superconductivity has often been discovered in materials with a layered (two-dimensional) crystal structure. The low dimensionality can affect the electronic structure and c…
Superconductivity in novel BiS2-based layered superconductor LaO1-xFxBiS2
Yoshikazu Mizuguchi, Satoshi Demura, Keita Deguchi +5
Layered superconductors have provided some interesting fields in condensed matter physics owing to the low dimensionality of their electronic states. For example, the high-Tc (high…
Evolution of tetragonal phase in the FeSe wire fabricated by a novel chemical-transformation PIT process
Hiroki Izawa, Yoshikazu Mizuguchi, Toshinori Ozaki +2
We fabricated superconducting FeSe wires by the chemical-transformation PIT process. The obvious correlation between annealing temperature and phase transformation was observed. An…
Transport properties of the single- and 3-core Fe-Se wires fabricated by a novel chemical-transformation PIT process
Yoshikazu Mizuguchi, Hiroki Izawa, Toshinori Ozaki +2
We fabricated single- and 3-core superconducting Fe-Se wires using a novel process based on a chemical transformation from hexagonal FeSe1+d (non-superconducting) to tetragonal FeS…