J-GLOBAL         Last updated: Oct 16, 2018 at 17:16
Tokyo Metropolitan University
Graduate School of Science and Engineering Department of Physics
Job title
assistant prof.
Ph.D(Tsukuba Univ.)


Research interests: search for new superconducting materials, solid state physics & chemistry, magnetism, superconductivity application

Gooogle Scholar Citations
→ https://scholar.google.co.jp/citations?user=_xmFB8cAAAAJ&hl=ja

7449 citations
h-index: 39
(by Google Scholar Citation, 2018/10/16)

[Typical papers]

Y. Mizuguchi et al., “Superconductivity at 27K in tetragonal FeSe under high pressure”, Appl. Phys. Lett. 93, 152505(1-3) (2008).

Y. Mizuguchi et al., “Superconductivity in S-substituted FeTe”, Appl. Phys. Lett. 94, 012503(1-3) (2009).

Y. Mizuguchi et al., “Anion height dependence of Tc for the Fe-based superconductor”, Supercond. Sci. Technol. 23, 054013(1-5) (2010).

Y. Mizuguchi et al., “Superconductivity in novel BiS2-based layered superconductor LaO1-xFxBiS2”, J. Phys. Soc. Jpn. 81, 114725(1-5) (2012).

Y. Mizuguchi et al., “BiS2-based layered superconductor Bi4O4S3”, Phys. Rev. B 86, 220510(1-5) (2012).

Y. Mizuguchi et al., “Enhancement of thermoelectric properties by Se substitution in layered bismuth-chalcogenide LaOBiS2-xSex”, J. Appl. Phys. 116, 163915(1-4) (2014).

Y. Mizuguchi et al., “In-plane chemical pressure essential for superconductivity in BiCh2-based (Ch: S, Se) layered structure”, Sci. Rep. 5, 14968(1-8) (2015).

Y. Mizuguchi et al., “High-Pressure Synthesis and Superconductivity of Ag-Doped Topological Crystalline Insulator SnTe (Sn1-xAgxTe with x = 0−0.5)”, J. Phys. Soc. Jpn. 85, 053702(1-5) (2016).

Y. Mizuguchi et al., "Crystal structure, site selectivity, and electronic structure of layered chalcogenide LaOBiPbS3", EPL 119, 26002 (2017).

R. Jha, Y. Goto, R. Higashinaka, T. D. Matsuda, Y. Aoki, Y. Mizuguchi, "Superconductivity in layered Oxychalcogenide La2O2Bi3AgS6", J. Phys. Soc. Jpn. 87, 083704 (2018).

K. Hoshi, Y. Goto, Y. Mizuguchi, "Selenium isotope effect in the layered bismuth chalcogenide superconductor LaO0.6F0.4Bi(S,Se)2", Phys. Rev. B 97, 094509 (2018).

Y. Mizuguchi et al., "Evolution of Anisotropic Displacement Parameters and Superconductivity with Chemical Pressure in BiS2-Based REO0.5F0.5BiS2 (RE = La, Ce, Pr, and Nd)", J. Phys. Soc. Jpn. 87, 023704 (2018).

R. Sogabe, Y. Goto, Y. Mizuguchi, "Superconductivity in REO0.5F0.5BiS2 with high-entropy-alloy-type blocking layers", Appl. Phys. Express 11, 053102 (2018).

(latest update: 2018.10.16)

Research Interests


Research Areas


Academic & Professional Experience

Aug 2010
Mar 2011
JSPS Fellow (PD), National Institute for Materials Science
Apr 2010
Jul 2010
JSPS Fellow (DC2), National Institute for Materials Science
Apr 2008
Mar 2010
NIMS Junior Researcher, National Institute for Materials Science

Published Papers

Satoshi Demura, Hiroyuki Okazaki, Toshinori Ozaki, Hiroshi Hara, Yasuna Kawasaki, Keita Deguchi, Tohru Watanabe, Saleem James Denholme, Yoshikazu Mizuguchi, Takahide Yamaguchi, Hiroyuki Takeya, Yoshihiko Takano
   May 2012
We have successfully synthesized FeSe films by the electrochemical deposition
in the electrolyte containing FeCl_{2}\cdot4H_{2}O, SeO_{2} and Na_{2}SO_{4}.
The composition ratio of Fe and Se was controlled by the synthesis voltage and
pH value. Th...
H. Okazaki, T. Watanabe, T. Yamaguchi, Y. Kawasaki, K. Deguchi, S. Demura, T. Ozaki, S. J. Denholme, Y. Mizuguchi, H. Takeya, Y. Takano
   May 2012
We have fabricated thin films of FeTeTexSeTex using a scotch-tape
method. The superconductivities of the thin films are different from each other
although these films were fabricated from the same bulk sample. The result
clearly presents the...
Masanori Nagao, Yoshikazu Mizuguchi, Keita Deguchi, Satoshi Watauchi, Isao Tanaka, Yoshihiko Takano
   Apr 2012
Superconductivity of Fe0.95Te0.85S0.15 was induced and enhanced by immersing
the as-grown (non-superconducting) sample into sulfuric acid. Dissolved Fe was
detected in the sulfuric acid treatment, indicating that excess Fe was removed
from the Fe0...
Antonella Iadecola, Boby Joseph, Laura Simonelli, Alessandro Puri, Yoshikazu Mizuguchi, Hiroyuki Takeya, Yoshihiko Takano, Naurang Lal Saini
Journal of Physics: Condensed Matter 24 (2012) 115701      Apr 2012
We have measured local structure of superconducting K_{0.8}Fe_{1.6}Se_{2}
chalcogenide (T_{c}=31.8 K) by temperature dependent polarized extended x-ray
absorption fine structure (EXAFS) at the Fe and Se K-edges. We find that the
system is characte...
Masashi Tokunaga, Takumi Kihara, Yoshikazu Mizuguchi, Yoshihiko Takano
J. Phys. Soc. Jpn. 81, 063703 (2012)      Mar 2012
The transport and structural properties of Fe1+yTe1-xSx (x=0, 0.05, and 0.10)
crystals were studied in pulsed magnetic fields up to 65 T. The application of
high magnetic fields results in positive magnetoresistance effect with
prominent hysterese...


Yoshikazu Mizuguchi
   Aug 2018
In 2012, we discovered superconductivity in Bi4O4S3 and LaO1-xFxBiS2 whose
crystal structure is composed of an alternate stacks of a BiS2-type conduction
layer and a blocking layer. After the discovery, many related superconductors
and functional ...
Kouhei Nagasaka, Atsuhiro Nishida, Rajveer Jha, Joe Kajitani, Osuke Miura, Ryuji Higashinaka, Tatsuma D. Matsuda, Yuji Aoki, Akira Miura, Chikako Moriyoshi, Yoshihiro Kuroiwa, Hidetomo Usui, Kazuhiko Kuroki, Yoshikazu Mizuguchi
J. Phys. Soc. Jpn. 86, 074701(1-6) (2017)      Feb 2017
We have investigated the crystal structure and physical properties of
LaO1-xFxBiSSe to reveal the intrinsic superconductivity phase diagram of the
BiCh2-based layered compound family. From synchrotron X-ray diffraction and
Rietveld refinements wit...
Ryota Sogabe, Yosuke Goto, Tomohiro Abe, Chikako Moriyoshi, Yoshihiro Kuroiwa, Akira Miura, Kiyoharu Tadanaga, Yoshikazu Mizuguchi
   Aug 2018
To investigate the interlayer interaction in the recently synthesized
high-entropy-alloy-type (HEA-type) REO0.5F0.5BiS2 superconductors (RE: rare
earth), we have systematically synthesized samples with close lattice
parameters and different mixing...
Rajveer Jha, Yosuke Goto, Ryuji Higashinaka, Tatsuma D. Matsuda, Yuji Aoki, Yoshikazu Mizuguchi
J. Phys. Soc. Jpn 87, 083704 (2018)      Jul 2018
We report the superconductivity in layered oxychalcogenide La2O2Bi3AgS6
compound. The La2O2Bi3AgS6 compound has been reported recently by our group,
which has a tetragonal structure with the space group P4/nmm. The crystal
structure of La2O2Bi3AgS...
Yosuke Goto, Akira Miura, Ryosuke Sakagami, Yoichi Kamihara, Chikako Moriyoshi, Yoshihiro Kuroiwa, Yoshikazu Mizuguchi
J. Phys. Soc. Jpn. 87, 074703 (2018)      May 2018
Inspired by the recent first-principles calculations showing the high
thermoelectric performance of layered pnictogen chalcogenides, we
experimentally characterise the crystal structure and high-temperature
transport properties of the layered anti...