Anisotropic Upper Critical Field of LuNi{sub 2}B{sub 2}C

Journal Article · Mon Sep 01 04:00:00 EDT 1997 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.79.1738· OSTI ID:538641

Metlushko, V; Welp, U; Koshelev, A; Aranson, I; Crabtree, G W ^[1]; Canfield, P C ^[2]

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1. Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
2. Ames Laboratory and Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011 (United States)

The upper critical field, H{sub c2} , of LuNi{sub 2}B{sub 2}C has been determined from the temperature dependence of the magnetization. A temperature dependent anisotropy within the basal plane which decreases from a value of 1.1 at 4.5K to a value of 1.0 at T{sub c} and an almost temperature independent out-of-plane anisotropy have been observed. Near T{sub c} the upper critical field along all directions shows a strong upward curvature. These features of H{sub c2} can be explained quantitatively using a nonlocal extension of the Ginzburg-Landau equations. The Fermi velocity averages determined from these measurements and those obtained in band structure calculations are in good agreement. {copyright} {ital 1997} {ital The American Physical Society}

• DOE Contract Number: W-31109-ENG-38
• OSTI ID: 538641
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 9 Vol. 79; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANISOTROPY
BORIDES
CARBIDES
CRITICAL FIELD
GINZBURG-LANDAU THEORY
LUTETIUM COMPOUNDS
MAGNETIZATION
NICKEL COMPOUNDS
SUPERCONDUCTIVITY
TEMPERATURE DEPENDENCE