Hostname: page-component-78c5997874-j824f Total loading time: 0 Render date: 2024-11-19T07:13:52.683Z Has data issue: false hasContentIssue false
  • English
  • Français

Absorption of Radiation by Magnetic Superlattices

Published online by Cambridge University Press:  26 February 2011

J.G. LePage  and
R.E. Camley
J.G. LePage
Affiliation:
University of Colorado, Physics Department, Colorado Springs, CO 80933-7150
R.E. Camley
Affiliation:
University of Colorado, Physics Department, Colorado Springs, CO 80933-7150
Get access

Abstract

We calculate the absorption of infra-red radiation by a magnetic superlattice composed of alternating ferromagnetic films. Although the films are ferromagnetic, the interfacial interaction is antiferromagnetic (i.e. Fe/Gd or Co/Gd). As has been shown previously, such a system can exist in several distinct phases, and we calculate the power absorption for these different phases. The spin wave modes of the system were found and used to construct a Green's function via an eigenvector expansion. The incoming radiation was modeled as an oscillating magnetic field which was assumed to decay into the material. Given this driving field, the Green's function yields the response of the system. Our results indicate that a simple absorption measurement can be used to probe for surface and bulk magnetic phase transitions. Additionally, we can find the response of the system to a spatially uniform driving field and thus calculate the local susceptibility. We discuss the possibility of using such a susceptibility to find dipole-exchange modes in magnetic superlattices.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 231: Symposium S – Magnetic Surfaces, Thin Films and Multilayers , 1991 , 433
Copyright
Copyright © Materials Research Society 1992

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1) Kwo, J. et al. Phys. Rev. B 35, 7925 (1987); C. F. Majkrzak et al. Phys. Rev. Lett., 56 2700 (1986); M. B. Salamon et al. Phys. Rev. Lett., 56 259 (1986); J. J. Rhyne et al. J. Appl. Phys. 61, 4043 (1987)Google Scholar
2) Camley, R. E., Kwo, J., Hong, M. and Chien, C. L., Phys. Rev. Lett., 64, 2703 (1990)Google Scholar
3) Grllnberg, P., Schreiber, R., Pang, Y., Brodsky, M. B. and Sowers, H., Phys. Rev. Lett., 57, 2442 (1986)CrossRefGoogle Scholar
4) Tsunashima, S., Ichikawa, T., Nawate, M., and Uchiyama, S., J. Phys. (Paris) Colloq. 49 C8–1803 (1988)Google Scholar
5) Camley, R. E., Phys. Rev. B 39 12316 (1989)Google Scholar
6) LePage, J. G. and Camley, R. E., Phys. Rev. Lett., 65 1152 (1990)Google Scholar
7) Hinchey, L.L. and Mills, D. L., Phys. Rev. B 33, 3329 (1986); Phys. Rev. B 34, 1689 (1986)Google Scholar
8) Almeida, N. S. and Mills, D. L., Phys. Rev. B 37 3400 (1988)CrossRefGoogle Scholar