Specific heat of (U/sub 0. 97/Th/sub 0. 03/)Be/sub 13/ under pressure

Conference · Wed Apr 01 04:00:00 EST 1987

OSTI ID:6362020

Fisher, R A; Lacy, S E; Marcenat, C; Olsen, J A; Phillips, N E; Fisk, Z; Smith, J L

The specific heat, C, of (U/sub 0.97/Th/sub 0.03/)Be/sub 13/ has been measured for 0.1 less than or equal to T less than or equal to 1K and 1.6 less than or equal to P less than or equal to 7.7 kbar, and for 0.1 less than or equal to T less than or equal to 20K with P = 0. For T > 8K both the pure and Th substituted samples have essentially the same C. The peaks in C/T at 0.33 and 0.54 for P = 0 are suppressed and shifted to lower T by pressure. Anomalies in C/T can be correlated to corresponding rapid changes in magnetic susceptibility, chi. Rapid suppression of the peaks and shift of T/sub c/ to lower values is in marked contrast to the behavior found for pure UBe/sub 13/ whose single peak amplitude decreases approximately linearly with P to about 60% at 9.3 kbar. The broad ''shoulder'' in C/T near 2K that is found for UBe/sub 13/, but not for any other heavy-fermion compound, HFC, is completely suppressed in the Th substituted sample.

• Research Organization: Lawrence Berkeley Lab., CA (USA); Los Alamos National Lab., NM (USA)
• DOE Contract Number: AC03-76SF00098
• OSTI ID: 6362020
• Report Number(s): LBL-23533; CONF-870873-7; ON: DE87011097
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ACTINIDE ALLOYS
ALLOYS
BERYLLIUM ALLOYS
INTERMETALLIC COMPOUNDS
PHYSICAL PROPERTIES
PRESSURE EFFECTS
SPECIFIC HEAT
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
THORIUM ALLOYS
URANIUM ALLOYS
VERY HIGH PRESSURE