Gupta, Rajeev ; Joshi, Janhavi P. ; Bhat, S. V. ; Sood, A. K. ; Rao, C. N. R. (2000) An electron paramagnetic resonance study of Pr0.6Ca0.4MnO3 across the charge-ordering transition Journal of Physics: Condensed Matter, 12 (30). ISSN 0953-8984
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Official URL: http://iopscience.iop.org/0953-8984/12/30/319
Related URL: http://dx.doi.org/10.1088/0953-8984/12/30/319
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: | Article |
|---|---|
| Source: | Copyright of this article belongs to Institute of Physics Publishing. |
| ID Code: | 2728 |
| Deposited On: | 08 Oct 2010 10:12 |
| Last Modified: | 23 May 2011 06:32 |
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