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Title: An electron paramagnetic resonance study of Pr0.6Ca0.4MnO3 across the charge-ordering transition
Authors: Gupta, Rajeev
Joshi, Janhavi P
Bhat, S V
Sood, A K
Rao, C N R
Keywords: Spin Dynamics
Issue Date: 31-Jul-2000
Publisher: IOP Publishing Ltd
Citation: Journal Of Physics: Condensed Matter 12(30), 6919-6926 (2000)
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 (T-CO) at similar to 240 K and antiferromagnetic transition (T-N) at similar to 170 K The asymmetry parameter for the Dysonian single-crystal spectra shows an anomalous increase at T-CO. Below T-CO the g-value increases continuously, suggesting a gradual strengthening of the orbital ordering. The linewidth undergoes a sudden increase at T-CO and continues to increase down to T-N. The intensity increases as the temperature is decreased until T-CO is reached, due to the renormalization of the magnetic susceptibility arising from the build-up of ferromagnetic correlations.
Description: Restricted Access
Other Identifiers: 0953-8984
Appears in Collections:Research Papers (Prof. C.N.R. Rao)

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