Relaxation mechanism for ordered magnetic materials

Permanent URL: http://hdl.handle.net/2047/d20002285
Title:
Relaxation mechanism for ordered magnetic materials
Creator:
Vittoria, C. (Author)
Yoon, S. D. (Author)
Widom, A. (Author)
Publisher:
American Physical Society
Copyright date:
2010
Type of resource:
Text
Genre:
Articles
Format:
electronic
Digital origin:
born digital
Abstract/Description:
We have formulated a relaxation mechanism for ferrites and ferromagnets (insulators and metals) whereby the coupling between the magnetic motion and lattice is based purely on continuum arguments concerning magnetostriction. This theoretical approach contrasts with previous mechanisms based on microscopic formulations of spin-phonon interactions employing a discrete lattice. Our model explains the scaling of the intrinsic ferromagnetic resonance linewidth with frequency, with temperature { ∝1/Ms(T)} and the anisotropic nature of magnetic relaxation in ordered magnetic materials. Here, Ms(T) is the thermal saturation magnetization. Without introducing adjustable parameters, our model is in reasonable quantitative agreement with experimental measurements of the intrinsic magnetic resonance linewidths of important class of ordered magnetic materials including both insulators and metals.
Comments:
Originally published in Physical Review B 81, 014412 (2010). doi 10.1103/PhysRevB81.014412 (http://link.aps.org/doi/10.1103/PhysRevB81.014412).
Subjects and keywords:
Ferrites (Magnetic materials)
Magnetostriction
Ferromagnetic resonance
relaxation mechanism
ferromagnets
insulators
metals
magnetic motion
magnetic lattice
thermal saturation magnetization
Electromagnetics and photonics
Permanent Link:
http://hdl.handle.net/2047/d20002285

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