O. Cugat et al., A COMPACT VIBRATING-SAMPLE MAGNETOMETER WITH VARIABLE PERMANENT-MAGNET FLUX SOURCE, Review of scientific instruments, 65(11), 1994, pp. 3570-3573
An automated vibrating-sample magnetometer is described where the vari
able magnetic field in excess of +/- 1.1 T is produced in a 26 mm bore
by an assembly of nested, rotating permanent magnet cylinders. The ho
mogeneity is better than 0.3% +/- 4 mT in 1 cc. The instrument has dim
ensions 200x420x700 mm, and its mass is 20 kg. Sensivity is better tha
n 0.4 muJ/T (4x10(-4) emu), which permits study of the susceptibility,
magnetization, and hysteresis of a wide range of magnetic materials,
including ferromagnetic thin films.