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Physical Review B (Condensed Matter and Materials Physics) -- February 1, 1998 -- Volume 57, Issue 5 pp. 2705-2708

Infrared spectra of giant magnetoresistance Fe/Cr/Fe trilayers

S. Uran, M. Grimsditch, Eric E. Fullerton, and S. D. Bader

Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439

(Received 3 July 1997)

Magnetic-field-induced changes in infrared transmission and reflection from Fe/Cr/Fe trilayers are reported. Changes as large as 1% (compared with 4–5 % changes in resistivity) are observed around 2000 cm ^{– 1}, and the magnitude of the effect decreases monotonically to zero at 5000 cm ^{– 1}. The field dependence mimics that of the resistivity, and saturates at the same field at which the magnetization of the two Fe layers align parallel to each other. A simple model, which estimates the frequency dependence of the resistivity and includes the frequency dependence of the skin depth, produces semiquantitative agreement with experiment. ©1998 The American Physical Society

URL: http://link.aps.org/abstract/PRB/v57/p2705
PACS: 75.70.Pa, 73.20.Dx, 78.30.Er, 78.20.Ci        Additional Information

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Citing Articles

1. Contactless measurement of giant magnetoresistance in thin films by infrared reflection
   John P. Camplin et al., J. Appl. Phys. 87, 4846 (2000)
2. Contactless measurement of giant magnetoresistance in CoAg granular films using infrared transmission spectroscopy
   M. Gester et al., J. Appl. Phys. 85, 5045 (1999)