Spin and angle-resolved photoemission studies of one to three monolayer films of p (1 times 1) Fe on W(100)

Journal Article · Mon Apr 15 00:00:00 EDT 1991 · Journal of Applied Physics; (USA)

DOI:https://doi.org/10.1063/1.348196· OSTI ID:5564852

Fink, R L; Mulhollan, G A; Andrews, A B; Erskine, J L; Walters, G K ^[1]

---

1. Department of Physics, University of Texas, Austin, Texas 78712 (USA)

The electronic and magnetic properties of thin (one to three monolayer) epitaxial Fe films grown on W(100) are studied using spin-polarized angle-resolved photoemission. Low-energy electron-diffraction studies of a number of samples confirm excellent epitaxy for monolayer films and suggest that two- and three-layer films begin to form strain-relieving dislocations. Submonolayer films manifest no in-plane remanent spin polarization at {ital T}=115 K, but effectively quench W(100) surface states and surface resonances. Monolayer and thicker films yield spin-polarized photoelectrons under remanent magnetic conditions. Analysis of spin-polarized electron energy distribution curves (EDCs) corresponding to even-symmetry initial states along the {bar {Gamma}}-{ital {bar M}} direction of the two-dimensional Brillouin zone yields a flat majority-spin band at 0.95 eV and an exchange split pair of bands ({Delta}{ital E}{sub ex}{Delta}{ital E}{sub ex}= 2.15 {plus minus} 0.2 eV at {bar {Gamma}}, 1.2{plus minus}0.2 eV at {ital {bar M}}) which exhibit significant dispersion. No significant changes in the binding energies of spin-up or -down features in EDCs obtained above the Curie temperature at {bar {Gamma}} (normal emission geometry) were detected.

• DOE Contract Number: AC02-76CH00016
• OSTI ID: 5564852
• Journal Information: Journal of Applied Physics; (USA), Journal Name: Journal of Applied Physics; (USA) Vol. 69:8; ISSN 0021-8979; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
AUGER ELECTRON SPECTROSCOPY
COHERENT SCATTERING
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DIFFRACTION
DISLOCATIONS
ELECTROMAGNETIC RADIATION
ELECTRON DIFFRACTION
ELECTRON SPECTROSCOPY
ELECTRONIC STRUCTURE
ELEMENTS
ENERGY SPECTRA
FILMS
IRON
LINE DEFECTS
LOW TEMPERATURE
MAGNETIC PROPERTIES
METALS
ORIENTATION
PHOTOELECTRON SPECTROSCOPY
PHYSICAL PROPERTIES
RADIATIONS
SCATTERING
SPECTRA
SPECTROSCOPY
SPIN ORIENTATION
STRAINS
TRANSITION ELEMENTS
TUNGSTEN
ULTRAVIOLET RADIATION