Coercivity and switching field of single domain γ-Fe2O3 particles under consideration of the demagnetizing field
- 15 November 1994
- journal article
- research article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 76 (10) , 6561-6563
- https://doi.org/10.1063/1.358194
Abstract
The coherent rotation of the spontaneous polarization in ellipsoidal ferromagnetic single domain particles is calculated under consideration of the magnetocrystalline anisotropy and the true, inner field. Magnetization curves and switching fields are computed for uniaxial and cubic magnetocrystalline and shape anisotropy. Considering only the magnetic energy inside the particle, the resulting switching fields are lower than those predicted by the Stoner–Wohlfarth theory, and they are qualitatively and quantitatively comparable to the results of other models. The comparison to measurements on isolated γ‐Fe2O3 particles shows excellent agreement.This publication has 11 references indexed in Scilit:
- Media requirements and recording physics for high density magnetic recordingIEEE Transactions on Magnetics, 1993
- The effect of mechanical stress on the magnetization curves of Ni- and FeSi-single crystals at strong fieldsIEEE Transactions on Magnetics, 1992
- Modeling of elongated fine ferromagnetic particlesJournal of Applied Physics, 1989
- Measurements on single magnetic particlesIEEE Transactions on Magnetics, 1978
- Stoner-Wohlfarth Calculation on Particle with Both Magnetocrystalline and Shape AnisotropyJournal of Applied Physics, 1959
- A mechanism of magnetic hysteresis in heterogeneous alloysPhilosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1948
- Magnetization curves for ferromagnetic single crystalsProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1948
- Theory of the Structure of Ferromagnetic Domains in Films and Small ParticlesPhysical Review B, 1946
- Demagnetizing Factors of the General EllipsoidPhysical Review B, 1945
- On magnetic and electrostatic energyProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1936