Changes in the superconducting properties of the Zr/sub 75/Rh/sub 25/ system on becoming amorphous

Journal Article · Mon Feb 01 04:00:00 EST 1982 · Sov. Phys. - JETP (Engl. Transl.); (United States)

OSTI ID:5041997

Panova, G; Chernoplekov, N; Shikov, A; Savel'ev, B

The heat capacity (from 2 to 700 K), magnetic susceptibility (from 2 to 300 K) and electrical resistivity (from T/sub c/ to 300 K) have been measured for the superconducting system Zr/sub 75/Rh/sub 25/ in the amorphous and metastable crystalline states. A simultaneous analysis of the results obtained enabled the temperature dependence of the phonon heat capacity and its anharmonic component to be determined. An anomalous increase in phonon heat capacity and an increase in the electron density of states at the Fermi surface was found for the amorphous phase of Zr/sub 75/Rh/sub 25/ compared with the crystalline phase. The contributions to the change in T/sub c/ connected with rearrangement of the phonon and electron spectra and the electron-phonon interaction, when the Zr/sub 75/Rh/sub 25/ system becomes amorphous, are discussed. The main contribution to the change in T/sub c/ comes from the rearrangement of the electron spectrum: the product of the density of states N(epsilon-c/sub F/) and the mean square matrix element of the electron-phonon interaction . The change in the phonon spectrum is small and is not a determining factor in the change of T/sub c/.

• Research Organization: I. V. Kurchatov Institute of Atomic Energy, Moscow
• OSTI ID: 5041997
• Journal Information: Sov. Phys. - JETP (Engl. Transl.); (United States), Journal Name: Sov. Phys. - JETP (Engl. Transl.); (United States) Vol. 55:2; ISSN SPHJA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
656102 -- Solid State Physics-- Superconductivity-- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena-- (-1987)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALLOYS
AMORPHOUS STATE
DATA
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
ELECTRON-PHONON COUPLING
ENERGY LEVELS
ENERGY-LEVEL DENSITY
EXCITED STATES
EXPERIMENTAL DATA
HIGH TEMPERATURE
INFORMATION
LOW TEMPERATURE
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
MEDIUM TEMPERATURE
METASTABLE STATES
NUMERICAL DATA
PHONONS
PHYSICAL PROPERTIES
PLATINUM METAL ALLOYS
QUASI PARTICLES
RHODIUM ALLOYS
SPECIFIC HEAT
SUPERCONDUCTIVITY
TEMPERATURE DEPENDENCE
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
ULTRALOW TEMPERATURE
VERY LOW TEMPERATURE
ZIRCONIUM ALLOYS