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Single crystal samples of Lu(Ni{sub 1{minus}x}Co{sub x}){sub 2}B{sub 2}C have been prepared for x=0{endash}0.09. In-plane electrical resistivity measurements show that the residual resistivity of these samples increases linearly with {ital x}, though by less than is observed for polycrystalline samples. T{sub c} is suppressed by the cobalt substitution (from 16.0 K for x=0 to 9.5 K for x=0.09), though magnetization measurements indicate that this is not due to pair breaking by magnetic impurities. The critical field H{sub C2}(T) decreases with increasing Co concentration, and has some anisotropy between H{parallel}c and H{perpendicular}c. The ratio of the coherence length to the mean-free path ({xi}{sub 0}/l) is estimated, and found to be approaching the dirty limit ({xi}{sub 0}/l{gt}1) as {ital x} increases. These results are discussed with reference to nonlocal effects and the vortex lattice structure of the borocarbides in the mixed state. {copyright} {ital 1998} {ital The American Physical Society}
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| Authors: |
Cheon, K.O.;
Fisher, I.R.;
Kogan, V.G.;
Canfield, P.C. [Ames Laboratory, Department of Physics and Astronomy, Iowa State University, Ames, Iowa 50011 (United States)];
Miranovic, P. [Nuclear Engineering Lab, University of Tokyo, Tokai-mura, Ibaraki 319-11 (Japan)];
Gammel, P.L. [Bell Laboratories, Lucent Technologies, Murray Hill, New Jersey 07974 (United States)]
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| Publication Date: | 1998 Sep 01 |
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| OSTI Identifier: | 641648 |
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| Resource Type: | Journal Article |
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| Resource Relation: | Journal Name: Physical Review, B: Condensed Matter; Journal Volume: 58; Journal Issue: 10; Other Information: PBD: Sep 1998 |
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| Country of Publication: | United States |
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| Language: | English |
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| Format: | Size: pp. 6463-6467 |
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| Other Number(s): | Journal ID: PRBMDO; ISSN 0163-1829; TRN: 98:007664 |
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| Subject: | 36 MATERIALS SCIENCE; ELECTRIC CONDUCTIVITY; SUPERCONDUCTORS; TRANSITION TEMPERATURE; CRITICAL TEMPERATURE; BORON COMPOUNDS; CARBON COMPOUNDS; LUTETIUM COMPOUNDS; NICKEL COMPOUNDS; COBALT COMPOUNDS; CARBIDES; BORON CARBIDES; LUTETIUM CARBIDES; NICKEL CARBIDES; COBALT CARBIDES; POLYCRYSTALS; MIXED STATE; MAGNETIC SUSCEPTIBILITY; MAGNETIZATION; COHERENCE LENGTH; CRITICAL FIELD |
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| Update Date: | 2009 Dec 16 |
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