Artículos de revistas
Microfurnace Thermomagnetic Analyser For The -30 °c To 1000 °c Temperature Range
Registro en:
Ieee Transactions On Magnetics. , v. 32, n. 5 PART 2, p. 4929 - 4931, 1996.
189464
10.1109/20.539291
2-s2.0-0030245424
Autor
De Morais E.
Gama S.
Urbano A.
Garcia G.A.
Cabral F.A.O.
Institución
Resumen
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 reproductibility of the measurements is very good, and there is only noticeable drift in the most sensitive range. © 1996 IEEE. 32 5 PART 2 4929 4931 Popov, O., Mikliov, M., Hopkinson Effect in an Assembly of Single Domain Particles - Thermomagnetic Curves of Nd2Fe14B-type Ribbons (1988) J. Magn Magn. Mat., 75, p. 135 Popov, O., Mikhov, M., Thermal Activation and the Hopkinson Effect (1989) J. Magn. Magn. Mat., 82, p. 29 Goldfarb, R.B., Minervini, J.V., Calibration of AC Susceptometer for Cylindrical Specimens (1984) Rev Sci. Instrum., 55, p. 761 Couach, M., Khoder, A.F., Monier, F., Study of Superconductors by AC Susceptibility (1985) Cryogenics, 25, p. 695 Khoder, A.F., Couach, M., Calibration Constant Calculations for Magnetic Susceptibility Measurements (1991) Cryogenics, 31, p. 763 Strnat, K.J., Mildrum, H.F., Tokunaga, M., Harada, H., Evidence for Domain Wall Pinning by a Magnetic Grain-Boundary Phase in Sintered Nd-Fe-B Based Permanent Magnets (1988) J. Appl. Phys., 63, p. 3321 Cabral, F.A.O., (1991), PhD Thesis, FEM - UNICAMP