Title :
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
fDate :
9/1/1996 12:00:00 AM
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;
Journal_Title :
Magnetics, IEEE Transactions on
