Local electronic structure and magnetic properties of LaMn(0.5)Co(0.5)O(3) studied by x-ray absorption and magnetic circular dichroism spectroscopy

TitleLocal electronic structure and magnetic properties of LaMn(0.5)Co(0.5)O(3) studied by x-ray absorption and magnetic circular dichroism spectroscopy
Publication TypeJournal Article
Year of Publication2008
AuthorsBurnus, T, Hu, Z, Hsieh, HH, Joly, VLJoseph, Joy, PAlias, Haverkort, MW, Wu, H, Tanaka, A, Lin, H-J, Chen, CT, Tjeng, LH
JournalPhysical Review B
Volume77
Issue12
Pagination125124
Date PublishedMAR
ISSN1098-0121
Abstract

We have studied the local electronic structure of LaMn(0.5)Co(0.5)O(3) using soft-x-ray absorption spectroscopy at the Co-L(3,2) and Mn-L(3,2) edges. We found a high-spin Co(2+)-Mn(4+) valence state for samples with the optimal Curie temperature. We discovered that samples with lower Curie temperatures contain low-spin nonmagnetic Co(3+) ions. Using soft-x-ray magnetic circular dichroism, we established that the Co(2+) and Mn(4+) ions are ferromagnetically aligned. We also revealed that the Co(2+) ions have a large orbital moment: morb/mspin approximate to 0.47. Together with model calculations, this suggests the presence of a large magnetocrystalline anisotropy in the material and predicts a nontrivial temperature dependence for the magnetic susceptibility.

DOI10.1103/PhysRevB.77.125124
Type of Journal (Indian or Foreign)Foreign
Impact Factor (IF)3.772
Divison category: 
Physical and Materials Chemistry