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A floating magnetic rotor is synchronized to a rotating magnetic field in the developed pump. We cannot measure or calculate the magnetic torque using a general measurement method because the angle theta (\theta) represents the unknown factor between the magnetic field and the magnetic moment on the magnetic rotor. We have converted the relationship between the rotating magnetic field and the rotation of the magnetic rotor to an electrical signal using Faraday's law. Converted signals have a phase difference that is converted to the angle theta (\theta) in the magnetic torque. This has allowed us to calculate the magnetic torque. [ABSTRACT FROM AUTHOR]

We describe the construction of a thermomagnetic analyser that uses a microfurnace. The equipment can work in the temperature range of -30/spl deg/C up to 1000/spl deg/C, with heating/cooling rates as high as 50/spl deg/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 /spl mu/g. The reproducibility of the measurements is very good, and there is only noticeable drift in the most sensitive range. [ABSTRACT FROM PUBLISHER]

A human-size magnetic shield of cylindrical structure (inner diameter: 92 cm, length: 220 cm) has been constructed with magnetic shaking enhancement. The weights of the magnetic materials used are 69 kg for Metglas 2705M amorphous tapes and 40 kg for Permalloy tapes and the total weight was about 250 kg. The shielding factor at the center was 4000 for a transverse magnetic field of 10 /spl mu/T, 1 Hz and residual dc magnetic field was as small as 1-2 nT when compensation for open ends was applied. The noise level of the shield measured, when open end compensation was off, by a SQUID magnetometer at the center of the shield was 54 fT//spl radic/Hz at 1 Hz and 23 fT//spl radic/Hz at 10 Hz. [ABSTRACT FROM PUBLISHER]