Effect of high magnetic fields on the heat capacity of strongly Pauli-paramagnetic Pd-Ni alloys

Journal Article · Mon Aug 01 04:00:00 EDT 1983 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.28.1457· OSTI ID:5609604

Ikeda, K; Gschneidner, Jr, K A; Schindler, A I

The low-temperature ((1.3--20.0)-K) heat capacity of strongly Pauli-paramagnetic Pd-Ni alloys containing 0.47 and 0.97 at. % Ni was measured in magnetic fields up to 10 T. The electronic specific-heat constant becomes smaller with increasing fields (12% or 13% at 9.98 T). This is probably due to the depression of the spin-fluctuation enhancement of heat capacity by the high magnetic fields and is in accord with the recent theoretical predictions. The coefficient ..beta.. of the T/sup 3/ term in the heat capacity becomes larger with increasing fields and at H> or approx. =5.39 T it reaches almost the same value as that for alloys containing more than approx.5 at. % Ni. Two possible mechanisms have been proposed to account for the increase in ..beta..: (1) The increase is due to the magnetic quenching of localized spin fluctuations in the vicinity of the nickel atoms, or (2) the increase is due to a magnetic contribution to the heat capacity which results from an induced magnetic moment on the nickel atoms by the applied magnetic field. Additional experiments are needed to determine which mechanism is the correct one.

• Research Organization: Ames Laboratory and Department of Materials Science and Engineering, Iowa State University, Ames, Iowa 50011
• OSTI ID: 5609604
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 28:3; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
ANGULAR MOMENTUM
DATA
EXCHANGE INTERACTIONS
EXPERIMENTAL DATA
FLUCTUATIONS
INFORMATION
INTERACTIONS
MAGNETIC FIELDS
MAGNETISM
NICKEL ALLOYS
NUMERICAL DATA
PALLADIUM ALLOYS
PARAMAGNETISM
PARTICLE PROPERTIES
PHYSICAL PROPERTIES
PLATINUM METAL ALLOYS
SPECIFIC HEAT
SPIN
THERMODYNAMIC PROPERTIES
ULTRALOW TEMPERATURE
VARIATIONS
VERY LOW TEMPERATURE