Magnetization of magnetically inhomogeneous Sr2FeMoO6-δ nanoparticles
Open Access
- 30 September 2021
- journal article
- Published by Pensoft Publishers in Modern Electronic Materials
- Vol. 7 (3), 85-90
- https://doi.org/10.3897/j.moem.7.3.75786
Abstract
Magnetization is a key property of magnetic materials. Nevertheless, a satisfactory, analytical description of the temperature dependence of magnetization in double perovskites such as strontium ferromolybdate is still missing. In this work, we develop, for the very first time, a model of the magnetization of nanosized, magnetically inhomogeneous Sr2FeMoO6-δ nanoparticles. The temperature dependence of magnetization was approximated by an equation consisting of a Bloch-law spin wave term, a higher order spin wave correction, both taking into account the temperature dependence of the spin-wave stiffness, and a superparamagnetic term including the Langevin function. In the limit of pure ferromagnetic behavior, the model is applicable also to SFMO ceramics. In the vicinity of the Curie temperature (T/TC > 0.85), the model fails.Keywords
This publication has 21 references indexed in Scilit:
- Angular dependence of spin-wave resonance and relaxation in half-metallic Sr2FeMoO6 filmsJournal of Applied Physics, 2008
- Intergrain magnetoresistance up to 50 T in the half-metallicdouble perovskite: Spin-glass behavior of the grain boundaryPhysical Review B, 2005
- Shape of Temperature Dependence of Spontaneous Magnetization of Ferromagnets: Quantitative AnalysisPhysical Review Letters, 2005
- Magnetic and electronic properties of a single crystal of ordered double perovskitePhysical Review B, 2000
- Theory of tunneling magnetoresistance in granular magnetic filmsPhysical Review B, 1996
- Estimates of the acoustic spin wave stiffness from electrical resistivity measurements on dilute PdFe, PdCo and PdMn alloysJournal of Physics F: Metal Physics, 1971
- Long-Range Exchange Interactions from Spin-Wave ResonancePhysical Review B, 1965
- Deviations fromLaw for Magnetization of Ferrometals: Ni, Fe, and Fe+3% SiPhysical Review B, 1963
- Thermodynamic Behavior of an Ideal FerromagnetPhysical Review B, 1956
- Zur Theorie des FerromagnetismusThe European Physical Journal A, 1930