Magnetic and structural properties of the double-perovskite Ca2FeReO6

Westerburg, W; Lang, O; Ritter, C; Felser, C.; Tremel, W; Jakob, G

doi:10.1016/S0038-1098(02)00079-0

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Magnetic and structural properties of the double-perovskite Ca₂FeReO₆

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Westerburg, W., Lang, O., Ritter, C., Felser, C., Tremel, W., & Jakob, G. (2002). Magnetic and structural properties of the double-perovskite Ca₂FeReO₆. Solid State Communications, 122(3-4): PII S0038-1098(02)00079-0, pp. 201-206. doi:10.1016/S0038-1098(02)00079-0.

Cite as: https://hdl.handle.net/11858/00-001M-0000-0018-5019-4

Abstract

We suceeded in the preparation of polycrystalline Ca2FeReO6 which has a Curie temperature T-C of 540 K, the highest value of all magnetic perovskites investigated till now. This material has been characterised by X-ray and neutron powder diffraction. We found at 548 K, a monoclinic unit cell (space group P2(1)/n) with a = 5.4366(5) Angstrom, b = 5.5393(5) Angstrom, c = 7.7344(5) Angstrom, and beta = 90.044(4)degrees. For temperatures below 400 K, a phase separation in two monoclinic phases with identical cell volume is observed in neutron scattering. The two phases possess different magnetic structure and coercivity. The conductivity is thermally activated for all temperatures and no significant magnetoresistivity is observed. (C) 2002 Elsevier Science Ltd. All rights reserved.