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TEMPERATURE DISTRIBUTION IN D. C. JOULE-HEATED AMORPHOUS MAGNETIC MATERIALS

I. Atef noaei1,* , D. Radu1, H. Chiriac2

Affiliation

  1. “Al.I. Cuza” University, Faculty of Physics, Carol I Blvd., No. 11, RO-700050, Iasi, Romania
  2. National Institute of Research and Development for Technical Physics, 47 Mangeron Blvd., Iasi 3, Romania

Abstract

The purpose of this paper is to present an improved theoretical and numerical model for the calculation of the temperature distribution in the amorphous magnetic materials such as: ribbons, conventional wires and glass-covered microwires, passed by an electrical direct current (d.c.) taking into account the d.c. Joule heating effects (conduction, convection and radiative heat losses and the structural changes appeared during the crystallization process of the conventional amorphous wires). The process of sample heating is accurately described by this improved theoretical model. The calculated temperature values are experimentally verified through magnetic measurements using a fluxmeter method performed on amorphous ribbons, conventional wires and respectively, glass-covered microwires with known Curie temperature. The theoretical results are in very good agreement with the experimental ones..

Keywords

Amorphous magnetic materials, Glass-covered microwires, Amorphous ribbons and wires.

Submitted at: Oct. 12, 2004
Accepted at: March 23, 2005

Citation

I. Atef noaei, D. Radu, H. Chiriac, TEMPERATURE DISTRIBUTION IN D. C. JOULE-HEATED AMORPHOUS MAGNETIC MATERIALS, Journal of Optoelectronics and Advanced Materials Vol. 7, Iss. 2, pp. 933-950 (2005)