FERROMAGNETIC CLUSTERS AND MAGNETIC POLARONS AS EVIDENCED BY ESR IN LA1.35SR1.65MN2O7

Authors
CHAUVET O GOGLIO G MOLINIE P CORRAZE B BROHAN L
Citation
O. Chauvet et al., FERROMAGNETIC CLUSTERS AND MAGNETIC POLARONS AS EVIDENCED BY ESR IN LA1.35SR1.65MN2O7, Physical review letters, 81(5), 1998, pp. 1102-1105
Citations number
15
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
81
Issue
5
Year of publication
1998
Pages
1102 - 1105
Database
ISI
SICI code
0031-9007(1998)81:5<1102:FCAMPA>2.0.ZU;2-L
Abstract
La1.35Sr1.65Mn2O7 is investigated in the regime where 3D magnetic orde r is lost but 2D correlations are strong. ESR shows that the localized t(2g) spins are coupled into intralayer ferromagnetic clusters of tir ed size. The e(g) carriers form polarons with an effective spin growin g from 1/2 to 7. ESR and transport properties suggest that the 3D orde r originates from the onset of coherence of the ferromagnetic clusters mediated by the propagation of the polarons.