Breakdown of deGennes scaling in (R(1-x)R'(x))Ni2B2C compounds

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1996-07-01
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Cho, BK
Johnston, DC
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American Physical Society
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Canfield, Paul
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The superconducting transition temperatures (T-c) and Neel temperatures (T-N) have been determined for thirty (R(1-x)R(x)')Ni2B2C Single crystals. For T-c > T-N, deviations from de Gennes scaling occur that are probably due to crystalline electric field effects. For T-c < T-N there is a complete breakdown of de Gennes scaling. In (D(1-x)R(x)')Ni2B2C, R' = Lu suppresses T-c an order of magnitude more rapidly than R' = Ho. This breakdown is inferred to arise from pair breaking by collective magnetic excitations.
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This article is published as Cho, B. K., P. C. Canfield, and D. C. Johnston. "Breakdown of de Gennes Scaling in (R 1− x R′ x) N i 2 B 2 C Compounds." Physical review letters 77, no. 1 (1996): 163. DOI: 10.1103/PhysRevLett.77.163. Copyright 1996 American Physical Society. Posted with permission.
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