Accumulation of crystal-lattice defects in plastic deformation of lead in the normal and superconducting states

Journal Article · Wed Dec 01 00:00:00 EST 1976 · Sov. Phys. - Solid State (Engl. Transl.); (United States)

OSTI ID:7323901

Lebedev, V P; Krylorskii, V S

We measured the resistivity (rho) of single crystals and polycrystalline aggregates of lead 99.9996% pure and with a ratio R (300 degreeK)/R (4.2 degreeK) =10/sup 4/ following active deformation by tension at a rate 2.5x10/sup -4/ sec/sup -1/ at 4.2degreeK in the normal and superconducting states. The resistivity was determined in a longitudinal magnetic field H=10 kOe. An increase of the degree of deformation (epsilon) leads to an increase of rho regardless of the state in which the metal is loaded. However, the increment ..delta..rho/sub epsilon/ due to dilatation in the superconductivity state is larger (this difference reaches approx.10% at small epsilon) than in the normal state in the entire range of investigated strains. It is shown that the larger the loss of strength in the superconducting state, the larger the difference in the increment ..delta..rho/sub epsilon/. It is concluded on the basis of estimates that when the metal loses strength as a result of the transition to the superconducting state the dislocation density changes insignificantly, and the concentration of the point defects increases.

• Research Organization: Khar'kov State University
• OSTI ID: 7323901
• Journal Information: Sov. Phys. - Solid State (Engl. Transl.); (United States), Vol. 18:12
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
LEAD
ELECTRIC CONDUCTIVITY
SUPERCONDUCTIVITY
CRYSTAL DEFECTS
DEFORMATION
PHASE TRANSFORMATIONS
CRYSTAL STRUCTURE
ELECTRICAL PROPERTIES
ELEMENTS
METALS
PHYSICAL PROPERTIES
360104* - Metals & Alloys- Physical Properties
656102 - Solid State Physics- Superconductivity- Acoustic
Electronic
Magnetic
Optical
& Thermal Phenomena- (-1987)