Effect of Nb on phonons of superconductors C-15 V/sub 2/Zr and V/sub 2/(HfZr)
Journal Article
·
· Chin. Phys.; (United States)
OSTI ID:6269537
Inelastic neutron scattering spectra from superconducting alloys C-15 V/sub 2/Zr, V/sub 2/Zr/sub 0.95/Nb/sub 0.05/ and V/sub 2/Hf/sub 0.5/Zr/sub 0.5/, V/sub 2/Hf/sub 0.5/Zr/sub 0.3/Nb/sub 0.2/ were measured by the neutron time-of-flight method. It was found that the additional content of Nb influenced the superconducting transition temperature T/sub c/ and phonon frequencies of V/sub 2/Zr/sub 1-x/Nb/sub x/ in a way different from that of V/sub 2/Hf/sub 0.5/Zr/sub 0.5-x/Nb/sub x/. The T/sub c/ increases and the phonon frequencies ''soften'' with increasing x for the former, while the T/sub c/ slightly decreases and the phonon frequencies ''harden'' for the latter. The result that the phonon frequencies of V/sub 2/Zr/sub 0.95/Nb/sub 0.05/ are softer than those of V/sub 2/Zr is somewhat in contradiction with previous results, which show that the magnetic susceptibilities decrease and the geometric mean phonon frequencies increase./sup 1//sup en-dash//sup 4/ The result that the phonon frequencies of V/sub 2/Hf/sub 0.5/Zr/sub 0.3/Nb/sub 0.2/ are harder than those of V/sub 2/Hf/sub 0.5/Zr/sub 0.5/ can be considered the result of hybridization of conduction bands, which is studied for close-packed compounds by means of the LMTO (linear combination of muffin-tin orbitals) method./sup 9/
- Research Organization:
- Institute of Atomic Energy, Academia Sinica
- OSTI ID:
- 6269537
- Journal Information:
- Chin. Phys.; (United States), Journal Name: Chin. Phys.; (United States) Vol. 4:3; ISSN CHPHD
- Country of Publication:
- United States
- Language:
- English
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· Chin. Phys.; (United States)
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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
COHERENT SCATTERING
DIFFRACTION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
HAFNIUM ALLOYS
NEUTRON DIFFRACTION
NIOBIUM ALLOYS
PHONONS
PHYSICAL PROPERTIES
QUASI PARTICLES
SCATTERING
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
VANADIUM ALLOYS
ZIRCONIUM ALLOYS
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
COHERENT SCATTERING
DIFFRACTION
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
HAFNIUM ALLOYS
NEUTRON DIFFRACTION
NIOBIUM ALLOYS
PHONONS
PHYSICAL PROPERTIES
QUASI PARTICLES
SCATTERING
SUPERCONDUCTIVITY
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
VANADIUM ALLOYS
ZIRCONIUM ALLOYS