Microfurnace thermomagnetic analyser for the -30°C to 1000°C temperature range

Author

de Morais, E. ; Gama, S. ; Urbano, A. ; Garcia, G.A. ; Cabral, F.A.O.

Author_Institution

Inst. de Fisica Gleb Wataghin, Univ. Estadual de Campinas, Sao Paulo, Brazil

Volume

32

Issue

5

fYear

1996

fDate

9/1/1996 12:00:00 AM

Firstpage

4929

Lastpage

4931

Abstract

We describe the construction of a thermomagnetic analyser that uses a microfurnace. The equipment can work in the temperature range of -30°C up to 1000°C, with heating/cooling rates as high as 50°C/min. without temperature hysteresis. The design allows the use of excitation and pick-up coils with thousands of turns, working at room temperature. This gives a high sensitivity to the equipment as revealed by the measurement of magnetic transitions in thin films with masses in the order of 500 μg. The reproducibility of the measurements is very good, and there is only noticeable drift in the most sensitive range

Keywords

electric furnaces; ferromagnetic materials; high-temperature techniques; magnetic thin films; magnetic transition temperature; magnetic variables measurement; temperature measurement; thermomagnetic effects; -30 to 1000 C; 500 mug; Curie temperature; cooling rate; excitation coils; ferromagnetic thin films; heating rate; high sensitivity; magnetic transition temperature measurement; microfurnace; pick-up coils; reproducibility; thermomagnetic analyser; Coils; Copper; Furnaces; Magnetic devices; Magnetic hysteresis; Proposals; Temperature distribution; Temperature sensors; Wire; Wounds;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.539291

Filename

539291