Multilayer relaxation and search for ferromagnetic order at the (100) surface of bulk paramagnetic vanadium

Journal Article · Tue May 15 00:00:00 EDT 2007 · Physical Review. B, Condensed Matter and Materials Physics

DOI:https://doi.org/10.1103/PHYSREVB.75.195423· OSTI ID:20951434

Lacina, D; Yang, J; Erskine, J L ^[1]

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1. Department of Physics, University of Texas at Austin, Austin, Texas 78712 (United States)

Low-energy-electron-diffraction (LEED) intensity measurements and multiple-scattering analysis for V(100), supported by accurate characterization of surface impurity concentrations based on Auger-electron spectroscopy, are used to obtain a meaningful extrapolation of the first-layer relaxation to the clean surface value: d{sub 12}=1.36{+-}0.05 A, corresponding to {delta}{sub 12}=-10%{+-}3% relative to the bulk value d{sub 0}=1.514 A. A high-sensitivity probe for surface magnetism based on magneto-optic Kerr effect polarimetry using the cleanest surfaces achieved in the LEED experiment ({approx}5% C) yields a (sensitivity limited) null result with an estimated upper limit of 0.05 {mu}{sub B}/surface atom. These results are discussed within the framework of related experiments and in relation to the predictive accuracy of ab initio calculations that explore the surface structure and magnetism of V(100) both of which are sensitive to different approximations for the exchange-correlation potential in density-functional theory.

• OSTI ID: 20951434
• Journal Information: Physical Review. B, Condensed Matter and Materials Physics, Vol. 75, Issue 19; Other Information: DOI: 10.1103/PhysRevB.75.195423; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1098-0121
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
AUGER ELECTRON SPECTROSCOPY
DENSITY FUNCTIONAL METHOD
ELECTRON CORRELATION
ELECTRON DIFFRACTION
EXCHANGE INTERACTIONS
FERROMAGNETIC MATERIALS
KERR EFFECT
LAYERS
MAGNETIC PROPERTIES
MAGNETO-OPTICAL EFFECTS
MULTIPLE SCATTERING
PARAMAGNETISM
RELAXATION
SURFACES
VANADIUM