EPR in La1-xCaxMnO3: Relaxation and bottleneck

Authors
Shengelaya, A Zhao, GM Keller, H Muller, KA Kochelaev, BI
Citation
A. Shengelaya et al., EPR in La1-xCaxMnO3: Relaxation and bottleneck, PHYS REV B, 61(9), 2000, pp. 5888-5890
Citations number
13
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
10980121 → ACNP
Volume
61
Issue
9
Year of publication
2000
Pages
5888 - 5890
Database
ISI
SICI code
1098-0121(20000301)61:9<5888:EILRAB>2.0.ZU;2-#
Abstract
Recent EPR and susceptibility measurements in La1-xCaxMnO3 support the exis tence of a bottleneck EPR regime up to 1000 K quantitatively. The EPR linew idth and electrical conductivity follow the same temperature dependence in the range of 250 to 650 K predicted by the small polaron hopping model. Thi s indicates that spin-lattice relaxation in manganates is due to the relaxa tion of spins of e(g) Jahn-Teller polarons to the lattice.