Charge-Ordered Antiferromagnetic to Ferromagnetic Phase Transition in Cr-Doped $Nd_{0.5}Ca_{0.5}Mn_{1-x} Cr_xO_3$: EMR and Magnetization Study

Sharma, A and Bhat, SV (2008) Charge-Ordered Antiferromagnetic to Ferromagnetic Phase Transition in Cr-Doped $Nd_{0.5}Ca_{0.5}Mn_{1-x} Cr_xO_3$: EMR and Magnetization Study. In: Applied Magnetic Resonance, 33 (1-2). pp. 11-17.

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Abstract

The Cr-doped rare-earth manganites $Nd_{0.5}Ca_{0.5}Mn_{1-x} Cr_xO_3$ (x = 0.03, 0.05, 0.10) are studied by electron magnetic resonance (EMR) and magnetization measurements in the paramagnetic as well as in the ferromagnetic phase. The magnetization measurements show that the charge-ordered antiferromagnetic phase decreases at the expense of ferromagnetic metallic phase and for Cr doping of x = 0.1, the charge-ordered phase melts completely. The EMR shows multiple signals for all three compositions in the ferromagnetic phase indicative of an anisotropic ferromagnetic phase. The difference between the shift of the high-field and low-field signals decreases with Cr doping, indicating that the magnetic anisotropy decreases with the Cr doping. In the paramagnetic phase the EMR line width follows Causa's model as observed in other colossal magnetoresistant manganites.

Item Type:	Journal Article
Publication:	Applied Magnetic Resonance
Publisher:	Springer
Additional Information:	Copyright of this article belongs to Springer.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	14 May 2008
Last Modified:	19 Sep 2010 04:44
URI:	http://eprints.iisc.ac.in/id/eprint/13903

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