Orbital structure and magnetic ordering in layered manganites: Universal correlation and its mechanism - art. no. 104401

Authors
Okamoto, S Ishihara, S Maekawa, S
Citation
S. Okamoto et al., Orbital structure and magnetic ordering in layered manganites: Universal correlation and its mechanism - art. no. 104401, PHYS REV B, 6310(10), 2001, pp. 4401
Citations number
39
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
01631829 → ACNP
Volume
6310
Issue
10
Year of publication
2001
Database
ISI
SICI code
0163-1829(20010301)6310:10<4401:OSAMOI>2.0.ZU;2-V
Abstract
Correlation between orbital structure and magnetic ordering in layered mang anites is examined. A level separation between the 3d(3z2-r2) and 3d(x2-y2) orbitals in a Mn ion is calculated in the ionic model for a large number o f the compounds. It is found that the relative stability of the orbitals do minates the magnetic transition temperatures as well as the magnetic struct ures at zero temperature. A mechanism of the correlation between orbital an d magnetism is explained by a theory based on the model with the two Eg orb itals under strong electron correlation.