期刊
ADVANCED MATERIALS
卷 20, 期 19, 页码 3692-+出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.200800218
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- Norwegian University of Science and Technology
- Research Council of Norway (NANOMAT) [158518/431, 140553/130, 162874/V00]
BiFeO3 displays an abrupt first order transition from the polar structure R3c to centrosymmetric R (3) over barc at T-C = 830 degrees C. The ferroelectric transition is associated with abrupt changes in polar cation displacements and a large discontinuous volume. A continuous volume expansion occurs across the second order antiferromagnetic transition at T-N = 370 degrees C. Electronic conductivity anomalies are associated with both phase transitions.
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