Abstract
The synthesis, structural and magnetic properties of a new type high permittivity material Ca(Ti 1/2Mn 1/2)O 3 was reported. The sample was prepared by conventional solid-state reaction route. Rietveld analysis revealed it was single perovskite with space group Pnma. Normalized bond length and bond valence were calculated to investigate the compression/dilation effects of bonds and atoms in unit cell. There were five types of Ca–O bonds and three kinds of (Ti, Mn)–O bonds in Ca(Ti 1/2Mn 1/2)O 3. The susceptibility curve at high temperature followed the Curie–Weiss law with Curie and Weiss constant as 0.8991 emu K/mol and −276.3 K, respectively. The calculated effective moment per Mn is 2.68 μ B-Bohr magneton. Antiferromagnetism and spin glass state at low temperature were found in Ca(Ti 1/2Mn 1/2)O 3. Frustration parameter was estimated to be about 30, suggesting the cluster-spin-glass resulted from geometrical frustration.
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