Ferromagnetic Resonance and Magnetization Studies on Ferrimagnetic Double Perovskites A $_{2}$ FeReO $_{6}$ (A = Ca, Sr, Ba)

Lofland, SE and Scabarozi, T and Kale, S and Bhagat, SM and Ogale, SB and Venkatesan, T and Greene, RL and Gopalakrishnan, J and Ramesha, K (2001) Ferromagnetic Resonance and Magnetization Studies on Ferrimagnetic Double Perovskites A $_{2}$ FeReO $_{6}$ (A = Ca, Sr, Ba). In: IEEE Transactions on Magnetics, 37 (4). pp. 2153-2155.

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Abstract

We present the results of an investigation of the magnetic properties A $_{2}$ FeReO $_{6}$ (A = Ca, Sr, Ba). We have studied the magnetization, high-temperature susceptibility and the ferromagnetic resonance response. The Ba and Sr systems are conducting while the Ca material is an insulator. The ordering temperature of the Ca materials is highest (\sim 540 K) and decreases to 315 K for the Ba system. The high-temperature susceptibilit suggests a large moment, and the Curie-Weiss temperature is very close to the ordering temperature, as expected for a simple ferromagnet, although the ferromagnetic moment is somewhat less than expected. The spin dynamics are rather peculiar: the ferromagnetic resonance results suggest a magnetically inhomogeneous material. We discuss these results in terms of cation disorder.

Item Type:	Journal Article
Publication:	IEEE Transactions on Magnetics
Publisher:	IEEE
Additional Information:	©2001 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Keywords:	Ferrimagnetic materials;magnetic materials;magnetic resonance
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	25 Aug 2008
Last Modified:	19 Sep 2010 04:16
URI:	http://eprints.iisc.ac.in/id/eprint/1865

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