Competition of spin states in heterogenous LaMnO3+δ
Journal
Japanese Journal of Applied Physics
Journal Volume
53
Journal Issue
12
Pages
123002
Date Issued
2014
Author(s)
Zhang, A. M.
Abstract
The heterogeneous spin states of non-stoichiometric LaMnO3+δ with low (annealed in argon) and high oxygen (prepared in air) are studied with X-ray diffraction (XRD) and electron spin resonance (ESR). The competition between Mn+3-O-Mn+4 and Mn+3-O-Mn+3 spin states results in the coexistence of ferromagnetic (FM) and canted antiferromagnetic (CAF) states, which are precisely identified by XRD and ESR. FM order from the double-exchange interaction of Mn+3-O-Mn+4 dominates in high-oxygen LaMnO3+δ, and CAF state from Mn+3-O-Mn+3 dominates in the samples with low oxygen. Our results further demonstrate the high sensitivity of ESR for the heterogenous sample with complex spin states.
SDGs
Type
journal article