Electron spin resonance of antiferromagnetism in Nd0.43 Sr0.57 Mn O3 and Nd0.35 Sr0.65 Mn O3
Journal
Journal of Applied Physics
Journal Volume
103
Journal Issue
5
Date Issued
2008
Author(s)
Geetha Kumary, T.
Abstract
The manganites Nd0.43Sr0.57MnO3 and Nd0.35Sr0.65MnO3, with A-type and C-type antiferromagnetic orders, respectively, are prepared and their physical properties are studied by electrical resistivity, ac∕dc susceptibility, and electron spin resonance (ESR) measurements. Results of the temperature dependent ESR linewidth suggest that the spin-spin interaction is the dominant relaxation mechanism in these layered manganites. The g factors are nearly temperature independent in the paramagnetic state, but it varies dramatically near TN, indicating a strong spin-orbit coupling near the transition. Different temperature-dependencies of g factor in these two samples reflect the distinct features in the layer∕chain antiferromagnetism.
Type
journal article