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

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

OSTI ID:7093729

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 at pressures to 8.2 kbar. Unlike cerium-based heavy-fermion compounds, an increase of C/T is observed with increasing pressure, with the linear term enhanced by about 16{percent} at 8.2 kbar. Above 7K, ({partial derivative}C/{partial derivative}P){sub T} is negative. The nuclear contribution observed at P {equals} 0 is increased by roughly a factor of two at 8.2 kbar. 7 refs., 3 figs.

• Research Organization: Lawrence Berkeley Lab., CA (USA)
• Sponsoring Organization: DOE/ER; SNSF
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 7093729
• Report Number(s): LBL-28749; CONF-900806--7; ON: DE90011584
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104 -- Metals & Alloys-- Physical Properties
656100* -- Condensed Matter Physics-- Superconductivity
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
COPPER COMPOUNDS
CRYSTALS
FERMIONS
PHYSICAL PROPERTIES
POLYCRYSTALS
PRESSURE DEPENDENCE
RARE EARTH COMPOUNDS
SPECIFIC HEAT
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
YTTERBIUM COMPOUNDS