Annealing samples of the superconducting compound Nb<sub>3</sub>Au with thermally induced disorder
D M R Lo Cascio; P I Loeff; H Bakker; D M R Lo Cascio; Van der Waals-Zeeman Lab., Amsterdam Univ., Netherlands; P I Loeff; Van der Waals-Zeeman Lab., Amsterdam Univ., Netherlands; H Bakker; Van der Waals-Zeeman Lab., Amsterdam Univ., Netherlands
Журнал:
Journal of Physics: Condensed Matter
Дата:
1992-09-07
Аннотация:
To investigate the kinetics of recovery of antisite disorder in the A15 compound Nb<sub>3</sub>Au, isochronal and isothermal annealing procedures at intermediate temperatures (between 833 and 1043 K) were performed on grains quenched from 1355(1) K. From these experiments, the vacancy migration enthalpy, and its pre-exponential factor were determined as 0.39 eV, and 2.7*10<sup>2</sup> s, respectively. The atomic-migration enthalpy and its pre-exponential factor were found to be 1.43 eV and 7.1*10<sup>-2</sup> s, respectively. These values are compared with data for the A15 compound V<sub>3</sub>Ga, and for Ca<sub>3</sub>Rh<sub>4</sub>Sn<sub>13</sub> which is a superconductor with an A15 substructure, and with data on ball-milled Nb<sub>3</sub>Au.
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