Masafumi Hanawa
Central Research Institute of Electric Power Industry
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Publication
Featured researches published by Masafumi Hanawa.
Physical Review Letters | 2001
Masafumi Hanawa; Yuji Muraoka; Toshiro Sakakibara; Takashi Tayama; Jun-Ichi Yamaura
We report the first pyrochlore oxide superconductor Cd2Re2O7. Resistivity,magnetic susceptibility,and specific heat measurements on single crystals evidence a bulk superconductivity at 1 K. Another phase transition found at 200 K suggests that a peculiar electronic structure lies behind the superconductivity.
Journal of the Physical Society of Japan | 2001
Zenji Hiroi; Masafumi Hanawa; N. Kobayashi; Minoru Nohara; Hidenori Takagi; Yoshitomo Kato; Masashi Takigawa
A novel cuprate Volborthite, Cu 3 V 2 O 7 (OH) 2 ·2H 2 O, containing an S -1/2 (Cu 2+ spin) kagome -like lattice is studied by magnetic susceptibility, specific heat, and 51 V NMR measurements. Sig...
Applied Physics Express | 2010
Yoshinori Imai; Takanori Akiike; Masafumi Hanawa; Ichiro Tsukada; Ataru Ichinose; Atsutaka Maeda; Tatsuo Hikage; Takahiko Kawaguchi; Hiroshi Ikuta
We have investigated the crystal structures and superconducting properties of thin films of FeSe0.5Te0.5 grown on eight different substrates. Superconductivity is not correlated with the lattice mismatch; rather it is correlated with the degree of in-plane orientation and with the lattice parameter ratio c/a. The best superconducting properties were observed in films on MgO and LaAlO3 (Tczero of 9.4 K). Transmission electron microscopy observation showed that the presence or absence of an amorphous-like layer at the substrate surface plays a key role in determining the structural and superconducting properties of the grown films.
Applied Physics Express | 2011
Ichiro Tsukada; Masafumi Hanawa; Takanori Akiike; Fuyuki Nabeshima; Yoshinori Imai; Ataru Ichinose; Seiki Komiya; Tatsuo Hikage; Takahiko Kawaguchi; Hiroshi Ikuta; Atsutaka Maeda
In-situ epitaxial growth of FeSe
Japanese Journal of Applied Physics | 2010
Yoshinori Imai; Ryo Tanaka; Takanori Akiike; Masafumi Hanawa; Ichiro Tsukada; Atsutaka Maeda
_{0.5}
Journal of Physics and Chemistry of Solids | 2002
Masafumi Hanawa; Jun-Ichi Yamaura; Yuji Muraoka; F. Sakai; Zenji Hiroi
Te
Physical Review Letters | 2002
O. Vyaselev; Koichi Arai; K. Kobayashi; J. Yamazaki; K. Kodama; Masashi Takigawa; Masafumi Hanawa; Zenji Hiroi
_{0.5}
Physical Review B | 2010
Ichiro Tsukada; Masafumi Hanawa; Seiki Komiya; Takanori Akiike; Ryo Tanaka; Yoshinori Imai; Atsutaka Maeda
thin films is demonstrated on a non-oxide substrate CaF
Applied Physics Letters | 2013
Fuyuki Nabeshima; Yoshinori Imai; Masafumi Hanawa; Ichiro Tsukada; Atsutaka Maeda
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Superconductor Science and Technology | 2013
Ataru Ichinose; Fuyuki Nabeshima; Ichiro Tsukada; Masafumi Hanawa; Seiki Komiya; Takanori Akiike; Yoshinori Imai; Atsutaka Maeda
. Structural analysis reveals that compressive stress is moderately added to 36-nm thick FeSe
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