Synthesis and specific heat of CaPdH 3-δ with the perovskite structure

Shin Ya Ayukawa, Kazutaka Ikeda, Masatsune Kato, Takashi Noji, Shin Ichi Orimo, Yoji Koike

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6 Citations (Scopus)


Single-phase samples of the hydrogen-deficient perovskite hydride CaPdH 3-δ with δ = 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, CaPdH 3-δ with δ - 0.9 was synthesized through the hydrogenation of the homogeneous CaPd alloy at room temperature. No superconductivity has been observed above 2K 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.

Original languageEnglish
Article number034704
JournalJournal of the Physical Society of Japan
Issue number3
Publication statusPublished - 2012 Mar


  • Hydride
  • Optical phonon
  • Perovskite
  • Specific heat
  • Superconductivity


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