Specific heat of well-characterized TiBe/sub 2/ at 0 and 7 T

Journal Article · Sat May 01 04:00:00 EDT 1982 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.25.5907· OSTI ID:5121231

Stewart, G R; Smith, J L; Giorgi, A L; Fisk, Z

The low-temperature specific heat at magnetic fields of 0 and 7 T, dc susceptibility, and resistivity data for two samples of TiBe/sub 2.00/ and one sample of TiBe/sub 1.94/O/sub 0.05/ are presented. The temperature dependence of the low temperature specific heats of all three samples of TiBe/sub 2/ is found to include an important T/sup 3/lnT term, confirming that spin fluctuations are present in TiBe/sub 2/, the first metal besides UAl/sub 2/ where such a T/sup 3/lnT term has been found. Evidence for a magnetic impurity present in one of the two pure TiBe/sub 2/ samples is inferred from the measurements and confirmed by the same measurements on the sample with oxygen intentionally added. The impurity is thought to increase the low-temperature susceptibility, shape the resistivity, and cause a 3% decrease of the low-temperature specific heat in a 7-T field at lower temperatures. At higher temperatures in the impure samples, and at all temperatures in the purer sample of TiBe/sub 2/, there is no change from the zero-field values in the specific heat to +- 1% in a 7-T field, in contradiction to the theoretical prediction of Beal-Monod. These field results are discussed with respect to the recent measurements of the low-temperature specific heats in a field of Pd and LuCo/sub 2/. Previous low-temperature specific-heat results on TiBe/sub 2.06/ and TiBe/sub 1.79/Cu/sub 0.21/ are also discussed.

• Research Organization: Los Alamos National Laboratory, Los Alamos, New Mexico 87545
• OSTI ID: 5121231
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 25:9; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
BERYLLIUM ALLOYS
DATA
EXPERIMENTAL DATA
IMPURITIES
INFORMATION
LATTICE PARAMETERS
MAGNETIC FIELDS
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
NUMERICAL DATA
PHYSICAL PROPERTIES
SPECIFIC HEAT
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
TITANIUM ALLOYS