Evidence of ferromagnetic domains in the $La_{0.^67}$$Ca_{0.33}$$Mn_{0.9}$$Fe_{0.1}$O3 perovskite

Yusuf, SM and Sahana, M and Hegde, MS and Dorr, K and Muller, KH (2000) Evidence of ferromagnetic domains in the $La_{0.^67}$$Ca_{0.33}$$Mn_{0.9}$$Fe_{0.1}$O3 perovskite. In: Physical Review B, 62 (01). pp. 1118-1123.

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Abstract

The nature of the low-temperature magnetic state of polycrystalline La0.67Ca0.33Mn0.9Fe0.1O3 has been studied by magnetization, neutron diffraction, and neutron depolarization measurements. Neutron depolarization measurements indicate the existence of ferromagnetic domains with low net magnetic moments below 108 K. The substitution of Mn3+ by Fe3+ reduces the number of available hopping sites for the Mn e(g) (up) electron and suppresses the double exchange, resulting in the reduction of ferromagnetic exchange. The competition between the ferromagnetic double-exchange interactions and the coexisting antiferromagnetic superexchange interactions and its randomness due to random substitutions of Mn3+ with Fe3+ drive the system into a randomly canted ferromagnetic state at low temperatures.

Item Type:	Journal Article
Publication:	Physical Review B
Publisher:	American Physical Society
Additional Information:	Copyright of this articles belongs to American Physical Society.
Department/Centre:	Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Date Deposited:	17 Jul 2009 10:40
Last Modified:	19 Sep 2010 04:58
URI:	http://eprints.iisc.ac.in/id/eprint/17706

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