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Phys. Rev. Lett. 78, 1154–1157 (1997)

[Issue 6 – 10 February 1997 ]

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k-Space Origin of the Long-Period Oscillation in Fe/Cr Multilayers: A Photoemission Study of Epitaxial Cr Grown on an Fe(100) Whisker

Dongqi Li, J. Pearson, and S. D. Bader

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

E. Vescovo¹, D.-J. Huang², and P. D. Johnson²

¹National Synchrotron Light Source, Brookhaven National Laboratory, Upton, New York 11973

²Physics Department, Brookhaven National Laboratory, Upton, New York 11973

B. Heinrich

Physics Department, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada

The k-space origin of the long-period (18 Å) oscillation in the interlayer magnetic coupling of Fe/Cr(100) multilayers is investigated by means of angle-resolved photoemission by probing quantum well (QW) states at the Fermi energy for epitaxial Cr grown on an Fe(100) whisker at 300 °C. The periodicity of the intensity oscillations of the Cr QW states in the vicinity of the d-derived "lens" feature of the Fermi surface is 17±2 Å. Thus the lens is identified as a prime candidate for the origin of the long period.

©1997 The American Physical Society

URL: http://link.aps.org/abstract/PRL/v78/p1154
DOI: 10.1103/PhysRevLett.78.1154
PACS: 75.70.Cn, 73.20.Dx, 79.60.Bm

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