Magnetic Transition in the Perovskite Ba2CoNbO6

✍ Scribed by K. Yoshii

• Book ID: 102606695
• Publisher: Elsevier Science
• Year: 2000
• Tongue: English
• Weight: 137 KB
• Volume: 151
• Category: Article
• ISSN: 0022-4596
• DOI: 10.1006/jssc.2000.8656

✦ Synopsis

The crystal structure of Ba 2 CoNbO 6 perovskite has been studied and was found to be cubic Pm3 m with a random occupation of the Co 3؉ and Nb 5؉ ions at the same crystallographic site. DC susceptibility+temperature ( +T ) curves exhibit weak ferromagnetic transitions at &43+47 K. The transition becomes less sharp as the applied 5eld is increased up to 50000 Oe. Finally, the transition disappears in a 5eld of H ‫؍‬ 50000 Oe. From the logarithmic time dependence of the magnetization at 5 K, this behavior is ascribed to the formation of spin-glass or clusterglass states, which are induced by the magnetic frustration due to the intermediate-spin (IS) state of Co 3؉ .