Synthesis and Characterization of CaPd₃O₄ Crystals

Hiroaki Samata, Satoshi Tanaka, Soichiro Mizusaki, Yujiro Nagata, Tadashi C. Ozawa, Akira Sato, Kosuke Kosuda

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DOI: 10.4236/jcpt.2012.21003                

Abstract

A new method for the crystal growth of alkaline-earth palladate CaPd₃O₄ was developed. The crystals were synthesized on a voltage-applied electrode in a molten chloride solvent. The maximum length of the crystal was about 1.5 mm. The X-ray diffraction data were refined well by assuming a cubic structure of the space group Pm n, and the lattice constant a was 5.7471 (10) ?. The temperature dependence of the resistivity showed semiconductor-like characteristics with a very small activation energy Ea of 0.45 meV at low temperatures, and the resistivity at 300 K was 0.1 cm. The temperature dependence of the molar magnetic susceptibility showed the Curie-Weiss paramagnetic behavior with a small molar Curie constant C_mol of 5.0(1) × 10^-3 emu K/(mol Oe), indicating the existence of localized spin moments.

Keywords

Single Crystal; Electrochemical Technique; CaPd₃O₄

Conflicts of Interest

The authors declare no conflicts of interest.

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