Synthesis and Characterization of CaPd<sub>3</sub>O<sub>4</sub>Crystals

• 作者: Akira Sato Hiroaki Samata Kosuke Kosuda Satoshi Tanaka Soichiro Mizusaki Tadashi C. Ozawa Yujiro Nagata
• 来源期刊: 结晶过程及技术期刊(英文)
• 学科: 化学
• 关键词: Single CRYSTAL ELECTROCHEMICAL Technique CaPd3O4
• 年，卷（期）: 2012,（1）
• 页码范围: 16-20
• 页数: 5页
• 分类号: O6

摘要

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 Cmol of 5.0(1) × 10-3 emu K/(mol Oe), indicating the existence of localized spin moments.