Open AccessRelationship between electrical resistance and thermal expansion coefficient in YBCO and Ti67Al33
Author(s) -
Д. К. Палчаев,
Zh. Kh. Murlieva,
М. Х. Рабаданов,
С. Х. Гаджимагомедов,
М. Э. Исхаков,
R. M. Emirov
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1686/1/012051
Subject(s) - thermal expansion , anharmonicity , intermetallic , materials science , superconductivity , electrical resistivity and conductivity , condensed matter physics , alloy , temperature coefficient , ceramic , relaxation (psychology) , thermal conductivity , electrical resistance and conductance , thermodynamics , composite material , psychology , social psychology , physics , engineering , electrical engineering
Experimental study of thermal coefficients of both electrical resistance and volume expansion in nanostructured superconducting ceramics YBa 2 Cu3O 7 -8 and intermetallic Ti 67 Al 33 alloy was performed. In both compounds we found a correlation between the temperature dependences of these coefficients. Formation and relaxation of charge excitations in conductors with a nonmetallic type of interatomic bonds are discussed. We point that, to explain temperature dependence of the conductivity, one should take into account an anharmonicity of atomic vibrations.