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Spin Polarized Photoemission Studies of Surfaces and Thin Films

Published online by Cambridge University Press:  26 February 2011

Peter D. Johnson ,
N.B. Brookes  and
Y. Chang
Peter D. Johnson
Affiliation:
Physics Dept., Brookhaven National Laboratory, Upton NY 11973.
N.B. Brookes
Affiliation:
Physics Dept., Brookhaven National Laboratory, Upton NY 11973.
Y. Chang
Affiliation:
Physics Dept., Brookhaven National Laboratory, Upton NY 11973.
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Abstract

Spin polarized photoemission is used to study the magnetic states associated with the clean iron (001) surface. These studies reveal evidence for a minority spin surface state in agreement with a first principles calculation. Studies of the same surface with silver and chromium epitaxial overlayers reveal evidence for interface states derived from this state found on the clean surface. In the case of the silver overlayer the binding energy of the new state is found to be dependent on the layer by layer thickness of the overlayer. With chromium overlayers the binding energy for the same interface state does not show the same thickness dependence. However a second interface state is observed immediately below the Fermi level. These changes in the interfacial electronic structure have implications for any modelling of magnetic coupling in multilayers dependent on the magnetic properties of the interface.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 231: Symposium S – Magnetic Surfaces, Thin Films and Multilayers , 1991 , 49
Copyright
Copyright © Materials Research Society 1992

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