Spin polarized photoemission studies of magnetic quantum well states

Technical Report · Thu Dec 01 04:00:00 EST 1994

DOI:https://doi.org/10.2172/10104544· OSTI ID:10104544

Johnson, P. D. ^[1]

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1. Brookhaven National Lab., Upton, NY (United States). Physics Dept.

There is currently considerable technological interest in the properties of transition metal multilayers. In these multilayers, which include Fe/Cr(001) and Cu/Co(001), it is possible to achieve either ferromagnetic or antiferromagnetic coupling of the adjacent ferromagnetic layers depending on the thickness of the intervening layer. The related giant magnetoresistance properties and the large enhancement of the Kerr rotation in these systems make them particularly interesting. In this paper, quantum well states with discrete binding energies dependent on the thickness of the film are observed in copper films deposited on a Co(001) substrate. They are found to be spin polarized, preferentially with minority spin. These states pass up to and through the Fermi level with a frequency identical to the long period of oscillation in the associated magnetic multilayers. In the pre-asymptotic limit the dispersion of these states away from the center of the zone is described by enhanced effective masses. This has implications for theories of the oscillatory exchange coupling that invoke the bulk Fermi surface.

• Research Organization: Brookhaven National Lab., Upton, NY (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 10104544
• Report Number(s): BNL--60869; CONF-940829--1; ON: DE95004218
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360606
AUGER ELECTRON SPECTROSCOPY
COBALT
COMPOSITE MATERIALS
COPPER
ELECTRONIC STRUCTURE
ENERGY LEVELS
EXPERIMENTAL DATA
INTERFACES
KERR EFFECT
LAYERS
MAGNETIC PROPERTIES
PHYSICAL PROPERTIES
QUANTIZATION