Author(s): Tadashi C. Ozawa | Akira Sato | Kosuke Kosuda | Yujiro Nagata | Hiroaki Samata | Satoshi Tanaka | Soichiro Mizusaki
Journal: Advances in Molecular Imaging
ISSN 2161-6728
Volume: 02;
Issue: 01;
Start page: 16;
Date: 2012;
Original page
Keywords: Single Crystal | Electrochemical Technique | CaPd< | sub> | 3< | /sub> | O< | sub> | 4< | /sub>
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) Å. 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.
Journal: Advances in Molecular Imaging
ISSN 2161-6728
Volume: 02;
Issue: 01;
Start page: 16;
Date: 2012;
Original page
Keywords: Single Crystal | Electrochemical Technique | CaPd< | sub> | 3< | /sub> | O< | sub> | 4< | /sub>
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) Å. 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.
