Effects of Oxygen Content on Bi3Mn3O11+δ: From 45 K Antiferromagnetism to Room-Temperature True Ferromagnetism
作者： Alexei A. Belik , Eiji Takayama-Muromachi
DOI: 10.1021/JA1043598
关键词:
摘要: The effects of oxygen content on the structural, physical, and chemical properties Bi(3)Mn(3)O(11) with KSbO(3)-type structure have been investigated. It was found that in Bi(3)Mn(3)O(11+delta) can vary over a wide delta range, keeping same cubic (space group Pn3, = 9.12172(5) A for -0.5, 9.13784(8) 0, 9.09863(7) 0.6) semiconducting material. At time, magnetic change from true antiferromagnetic T(N) 45 K -0.5 to ferromagnetic T(C) 307 +0.6. (delta 0) shows ferrimagnetic-like 150 features typical re-entrant spin-glass below 30 K. Noticeable changes transition temperature magnetism be compared electronic LaMnO(3+delta), BiMnO(3+delta), high-temperature copper superconductors (e.g., YBa(2)Cu(3)O(7+delta)), other cuprates. Bi(3)Mn(3)O(11.6) new record high among insulating/semiconducting ferromagnets. Our results demonstrate cation composition materials, increased up BiMnO(3.867) (Bi(3)Mn(3)O(11.6)).
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