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Magnetic domains structure of dc Joule-heated amorphous glass-covered magnetic wires

I. AŞTEFĂNOAEI1,* , H. CHIRIAC2, A. STANCU1

Affiliation

  1. “Al. I. Cuza” University, Faculty of Physics, Iasi , 700506, Romania
  2. National Institute of Research and Development for Technical Physics, Iasi, 700506, Romania

Abstract

In this paper, we have analyzed the influence of dc Joule heating on the magnetic domains structures of amorphous glasscovered wires. We have calculated the thermal stresses owing to the successive heating, crystallization and cooling of the metal as well as to contractions generated by the glass cover in the metal during the thermal treatment due to difference between the thermal expansion coefficients of metal and glass. We have found that: (i) the resultant stresses strongly depend on the dimensions of the metallic part and the glass cover of amorphous glass-covered wires; (ii) the dimensions of the cylindrical inner core (CIC) increase with the increase of the metal’s part radius; (iii) the increase of CIC’s radius after the thermal annealing leads to the values of the reduced remanence from 0.90 to 0.98 ..

Keywords

Amorphous, Glass-covered wires, Magnetic domanins.

Submitted at: Sept. 25, 2007
Accepted at: Feb. 18, 2008

Citation

I. AŞTEFĂNOAEI, H. CHIRIAC, A. STANCU, Magnetic domains structure of dc Joule-heated amorphous glass-covered magnetic wires, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 2, pp. 260-263 (2008)