Magnetoresistance of CeCu{sub 2}Si{sub 2}: Differences and similarities to UBe{sub 13}

Journal Article · Fri Dec 01 04:00:00 EST 1995 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.52.16031· OSTI ID:147769

Andraka, B ^[1]

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1. Department of Physics, University of Florida, Gainesville, Florida 32611-2085 (United States)

The magnetoresistance of nonsuperconducting CeCu{sub 1.9}Si{sub 2} and superconducting CeCu{sub 2.2}Si{sub 2} was measured for temperatures between 1.4 and 25 K and magnetic fields to 14 T. For temperatures larger than 5 K, both sets of data satisfy a scaling relation derived for the conventional single-channel Kondo model. According to the magnetoresistance, the single ion characteristic temperature {ital T}{sub 0} for CeCu{sub 1.9}Si{sub 2} is about 30% smaller than that for CeCu{sub 2.2}Si{sub 2}. The {ital T}{sub 0} values are in good agreement with the ones obtained from the low-temperature magnetic susceptibility but are larger than the characteristic temperatures derived from the low-temperature specific heat. This disagreement is especially large for the superconducting sample (by a factor of 2). The magnetoresistance results point to a fundamental difference between the low-temperature states in CeCu{sub 2}Si{sub 2} and UBe{sub 13} and possibly between other Ce- and U-based heavy fermions.

• OSTI ID: 147769
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 22 Vol. 52; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

66 PHYSICS
BERYLLIUM BASE ALLOYS
CERIUM SILICIDES
COPPER SILICIDES
KONDO EFFECT
MAGNETORESISTANCE
STOICHIOMETRY
SUPERCONDUCTIVITY
TEMPERATURE DEPENDENCE
TEMPERATURE RANGE 0000-0013 K
TEMPERATURE RANGE 0013-0065 K
URANIUM ALLOYS