A MODEL OF THE DC JOULE HEATING IN AMORPHOUS WIRES

Citation
H. Chiriac et I. Astefanoaei, A MODEL OF THE DC JOULE HEATING IN AMORPHOUS WIRES, Physica status solidi. a, Applied research, 153(1), 1996, pp. 183-189
Citations number
8
Categorie Soggetti
Physics, Condensed Matter
ISSN journal
00318965
Volume
153
Issue
1
Year of publication
1996
Pages
183 - 189
Database
ISI
SICI code
0031-8965(1996)153:1<183:AMOTDJ>2.0.ZU;2-L
Abstract
The annealing of magnetic amorphous wires by passing a de current thro ugh them leads to an improvement in their magnetic properties. A theor etical model is proposed for the calculation of the radial and tempora l distribution of the temperature produced by passing a dc current thr ough the wire by taking into account the linear temperature dependence of the electrical resistivity. The higher the value of the de current , the faster the equilibrium temperature is reached. The temperature d istribution is approximately constant in the cross-section of the wire . The calculated temperature values are experimentally verified throug h magnetic measurements using a fluxmeter on amorphous wires with know n Curie temperature. Tt is ascertained that the theoretical results ar e in good agreement with the experimental ones.