Bismuth manganese titanate: Crystal structure and properties

作者：Piir I V^*; Sekushin N A; Grass V E; Ryabkov Y I; Chezhina N V; Nekipelov S V; Sivkov V N; Vyalikh D V

来源：Solid State Ionics, 2012, 225: 464-470.

DOI：10.1016/j.ssi.2012.02.051

• Pyrochlore
• Bismuth manganese titanate
• Bi-Mn-Ti-O
• NEXAFS
• Magnetic behavior
• Electrical properties

Manganese-containing bismuth titanate solid solutions with a pyrochlore-type crystal structure were obtained by the ceramic technique over a wide range of compositions. The NEXAFS (near-edge X-ray absorption fine structure) spectra of Mn2p-absorption in bismuth manganese titanate pyrochlores point to manganese being mainly in the oxidation state +2 in these solid solutions. The Mn-rich bismuth titanate pyrochlores showed a superposition of antiferro- (long-order) and ferromagnetic (short-order) behavior. The results of impedance investigations show the electron-ionic conductivity in these samples.

• 出版日期2012-10-4