Electronic structure and magnetism of metastable bcc Co(001)

J. I. Lee, C. L. Fu, Arthur J Freeman

Research output: Contribution to journalArticle

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Abstract

The electronic structure and magnetism of thin films of metastable bcc phase Co(001) consisting of one-, five- and nine-layers is determined by means of all-electron local spin density full potential linearized augmented plane wave (FLAPW) calculations at the lattice constant found for bcc Co stabilized on a GaAs substrate by Prinz. Band structure, surface states, density of states, charge and spin densities and contact hyperfine fields are presented. The center layer of the many-layer films yields a spin magnetic moment of 1.76μB which agrees well with results of bulk calculations for bcc Co. The surface layer has a moment (1.94μB) which is only 10% greater than the bulk value - in sharp contrast to the enhancement found for other transition metal surfaces [35% for Fe(001), 20% for Ni(001) and over 300% for Cr(001)]. Unlike these other transition metal surfaces, even the first layer below the surface layer in Co has the bulk magnetic moment - which indicates that the spin density, like the charge density, shows very short range screening of the surface-vacuum interface.

Original languageEnglish
Pages (from-to)93-100
Number of pages8
JournalJournal of Magnetism and Magnetic Materials
Volume62
Issue number1
DOIs
Publication statusPublished - 1986

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Magnetism
Electronic structure
electronic structure
Magnetic moments
metal surfaces
Transition metals
surface layers
magnetic moments
transition metals
Metastable phases
Surface states
Charge density
Band structure
Lattice constants
Screening
plane waves
screening
Vacuum
moments
Thin films

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Electronic structure and magnetism of metastable bcc Co(001). / Lee, J. I.; Fu, C. L.; Freeman, Arthur J.

In: Journal of Magnetism and Magnetic Materials, Vol. 62, No. 1, 1986, p. 93-100.

Research output: Contribution to journalArticle

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