Electron spin resonance and magnetization in perovskite and pyrochlore manganites

M. Tovar, M. T. Causa, G. Ibañez, C. A. Ramos, A. Butera, F. Rivadulla, B. Alascio, S. B. Oseroff, S. W. Cheong, X. Obradors, S. Piñol

Research output: Contribution to journalArticlepeer-review

26 Scopus citations

Abstract

We have performed electron spin resonance (ESR) and dc susceptibility, χdc(T), measurements in La0.7Ca0.3MnO 3 perovskite up to 1000 K. This is adequately described in the paramagnetic regime in the constant coupling approximation assuming an effective Heisenberg-like pair interaction. The ESR linewidth is given by ΔH pp(T) = ΔHpp(∞)[C/Tχ(T)]. The ESR intensity follows the T dependence of χdc(T). We conclude that the relaxation mechanism is essentially the same for the whole studied paramagnetic range. The observed behavior reflects the progressive importance of magnetic clustering on approaching Tc. We have found similar T dependence for La0.7Sr0.3MnO3 and La 0.7Pb0.3MnO3 perovskites, and also for the pyrochlore In2Mn2O7.

Original languageEnglish (US)
Pages (from-to)7201-7203
Number of pages3
JournalJournal of Applied Physics
Volume83
Issue number11
DOIs
StatePublished - Jan 1 1998

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Fingerprint Dive into the research topics of 'Electron spin resonance and magnetization in perovskite and pyrochlore manganites'. Together they form a unique fingerprint.

Cite this