An electron paramagnetic resonance study of Pr0.6Ca0.4MnO3 across the charge-ordering transition

Gupta, Rajeev and Joshi, Janhavi P and Bhat, SV and Sood, AK and Rao, CNR (2000) An electron paramagnetic resonance study of Pr0.6Ca0.4MnO3 across the charge-ordering transition. In: Journal of Physics: Condensed Matter, 12 (30). pp. 6919-6926.

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Abstract

We report the first electron paramagnetic resonance studies of single crystals and powders of Pr0.6Ca0.4MnO3 in the 300-4.2 K range, covering the charge-ordering transition (Tco) at ~240 K and antiferromagnetic transition (TN) at ~170 K. The asymmetry parameter for the Dysonian single-crystal spectra shows an anomalous increase at Tco. Below Tco the g-value increases continuously, suggesting a gradual strengthening of the orbital ordering. The linewidth undergoes a sudden increase at Tco and continues to increase down to TN. The intensity increases as the temperature is decreased until Tco is reached, due to the renormalization of the magnetic susceptibility arising from the build-up of ferromagnetic correlations.

Item Type:	Journal Article
Publication:	Journal of Physics: Condensed Matter
Publisher:	Institute of Physics
Additional Information:	Copyright of this article belongs to Institute of Physics.
Department/Centre:	Division of Physical & Mathematical Sciences > Physics
Date Deposited:	23 Aug 2010 07:33
Last Modified:	19 Sep 2010 06:14
URI:	http://eprints.iisc.ac.in/id/eprint/31442

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