Pd2+-Incorporated Perovskite CaPd3B4O12 (B = Ti, V)

详细信息    查看全文

• 作者：Kentaro Shiro ; Ikuya Yamada ; Naoya Ikeda ; Kenya Ohgushi ; Masaichiro Mizumaki ; Ryoji Takahashi ; Norimasa Nishiyama ; Toru Inoue ; Tetsuo Irifune
• 刊名：Inorganic Chemistry
• 出版年：2013
• 出版时间：February 4, 2013
• 年：2013
• 卷：52
• 期：3
• 页码：1604-1609
• 全文大小：363K
• 年卷期：v.52,no.3(February 4, 2013)
• ISSN：1520-510X

文摘

Novel A-site ordered perovskites CaPd₃Ti₄O₁₂ and CaPd₃V₄O₁₂ were synthesized under high-pressure and high-temperature of 15 GPa and 1000 掳C. These compounds are the first example in which a crystallographic site in a perovskite-type structure is occupied by Pd²⁺ ions with a 4d⁸ low spin configuration. The ionic models for these compounds were determined to be Ca²⁺Pd²⁺₃Ti⁴⁺₄O₁₂ and Ca²⁺Pd²⁺₃V⁴⁺₄O₁₂ by structural refinement using synchrotron X-ray powder diffraction, hard X-ray photoemission, and soft X-ray absorption spectroscopy. Magnetic susceptibility, electrical resistivity, and specific heat measurements demonstrated diamagnetic insulating behavior for CaPd₃Ti₄O₁₂ in contrast to the Pauli-paramagnetic metallic nature of CaPd₃V₄O₁₂.