Magnetic field dependence of the specific heat of heavy-fermion YbCu sub 4. 5

Conference · Thu Mar 01 04:00:00 EST 1990

OSTI ID:6973148

Amato, A; Fisher, R A; Phillips, N E ^[1]; Jaccard, D; Walker, E ^[2]

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1. Lawrence Berkeley Lab., CA (USA)
2. Geneva Univ. (Switzerland). Dept. de Physique de la Matiere Condensee

The specific heat of a polycrystalline sample of YbCu{sub 4.5} has been measured between 0.3 and 20K in magnetic fields to 7T. At zero field a minimum in C/T is observed near 11K. Below that temperature C/T increases and below 0.5K exhibits an upturn ascribed to a hyperfine contribution. The increase in C/T below 11K is reduced by a factor 1.5 for H = 7T, whereas the hyperfine term is enhanced due to the contribution of the {sup 63}Cu and {sup 65}Cu and nuclei. 5 refs., 3 figs.

• Research Organization: Lawrence Berkeley Lab., CA (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6973148
• Report Number(s): LBL-28747; CONF-900806--9; ON: DE90011602
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
COPPER COMPOUNDS
FERMIONS
MAGNETIC FIELDS
PHYSICAL PROPERTIES
RARE EARTH COMPOUNDS
SPECIFIC HEAT
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
YTTERBIUM COMPOUNDS