ESR Studies on GMR Related Materials
Abstract
ESR measurements have been done on La0.9Ca0.1MnO3 from 4 K up to about 760 K. Two kinds of spectra (the high- and low-field signals) are observed below about 220 K, and clear signals above ~=233 K. The ESR linewidth, ΔHPP, of the high-field signal with g~=2 is nearly proportional to temperature times magnetic moment. The ESR intensity becomes maximum at around 233 K. Above 300 K, ΔHPP is nearly proportional to exp(-600/T), and the intensity follows Curie's law above 600 K, but gradually deviates upward from it with decreasing temperature below about 600 K, presumably due to the ``spin-cluster'' formation.
- Publication:
-
Modern Physics Letters B
- Pub Date:
- 2000
- DOI:
- 10.1142/S0217984900001336
- Bibcode:
- 2000MPLB...14.1033S