Synthesis and Specific Heat of CaPdH3-\delta with the Perovskite Structure
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概要
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Single-phase samples of the hydrogen-deficient perovskite hydride CaPdH3-\delta with \delta = 0.9 have successfully been synthesized. First, a homogeneous alloy of CaPd was prepared through the hydrogenation and subsequent dehydrogenation of an inhomogeneous alloy of CaPd obtained through the induction melting of Ca and Pd metals. Next, CaPdH3-\delta with \delta = 0.9 was synthesized through the hydrogenation of the homogeneous CaPd alloy at room temperature. No superconductivity has been observed above 2 K in the magnetic-susceptibility measurements. The specific-heat measurements have revealed that there exist optical phonons due to hydrogen vibrations with the Einstein temperature as high as about 1000 K.
- 2012-03-15
著者
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Koike Yoji
Department Applied Physics Graduate School Of Engineering Tohoku University
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Noji Takashi
Department Of Applied Physics Faculty Of Engineering Tohoku University
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Ikeda Kazutaka
Institute For Materials Research Tohoku University
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Kato Masatsune
Department Of Applied Physics Faculty Of Engineering Tohoku University
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Orimo Shin-ichi
Institute For Materials Research Tohoku University
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Ayukawa Shin-ya
Department of Applied Physics, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan
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Orimo Shin-ichi
Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
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Ikeda Kazutaka
Institute for Materials Research, Tohoku University, Sendai 980-8577, Japan
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Noji Takashi
Department of Applied Physics, Graduate School of Engineering, Tohoku University, Sendai 980-8579, Japan
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