Polarons in the layered perovskite manganite La1.2Sr1.8Mn2O7

Authors
Romero, DB Podobedov, VB Weber, A Rice, JP Mitchell, JF Sharma, RP Drew, HD
Citation
Db. Romero et al., Polarons in the layered perovskite manganite La1.2Sr1.8Mn2O7, PHYS REV B, 58(22), 1998, pp. R14737-R14740
Citations number
21
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B-CONDENSED MATTER
ISSN journal
01631829 → ACNP
Volume
58
Issue
22
Year of publication
1998
Pages
R14737 - R14740
Database
ISI
SICI code
0163-1829(199812)58:22<R14737:PITLPM>2.0.ZU;2-M
Abstract
The temperature (6-350 K) and magnetic-field dependence (0-7.5 T) of the ph ononic Raman spectra in the layered manganites, R1.2Sr1.8Mn2O7 (R = La,Nd), reveal anomalous behaviors of the Mn and equatorial O-xy(Big) modes arisin g from local octahedral distortions and coupling to the Mn3+ e(g) electrons . These results provide the evidence for polaron formation and its interpla y with electrical transport and magnetism in the layered manganites.