Observation of electronic phase separation in La0.825Sr0.175Mn1-xCuxO3 perovskites

Authors
Zheng, L Xu, XJ Pi, L Zhang, YH
Citation
L. Zheng et al., Observation of electronic phase separation in La0.825Sr0.175Mn1-xCuxO3 perovskites, PHYS REV B, 62(2), 2000, pp. 1193-1196
Citations number
24
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
01631829 → ACNP
Volume
62
Issue
2
Year of publication
2000
Pages
1193 - 1196
Database
ISI
SICI code
0163-1829(20000701)62:2<1193:OOEPSI>2.0.ZU;2-O
Abstract
We have found electronic phase separation characteristics in Cu-doped manga nese perovskite La0.825Sr0.175Mn1-xCuxO3 (x>0.10) by electron spin resonanc e (ESR) and magnetization study. An extra resonance signal observed in ESR spectra at high temperatures well above T-c provides strong evidence for th e electronic phase separation in these materials. Our results indicate that the background superexchange interaction, here enhanced by Cu doping, is f avorable for electronic phase separation in manganites.