S. N. Bose National Centre for Basic Sciences

Under Department of Science and Technology, Govt. of India

Technical Cell - Central Equipment Facilities

Vibrating Sample Magnetometer (VSM)

Fig: Vibrating Sample Magnetometer unit
Fig: Sample Holders

Specifications and Performance

Measurement Type

  • Moment vs Temperature (FC & ZFC)
  • Moment vs Field
  • Moment vs Time

Applied field strength

38.1 mm (1.5 in) magnet air gap
16.7KOe (1.67T)
Field homogeneity
±0.1% over cantered 5 cm (2 in) diameter circle

Gauss meter probe

Hall probe High stability; 74 mm (2.9 in) aluminium stem

For best results, the instrument and probe we warm up for at least 5 minutes before zeroing the probe, And at least 30 minutes for rated accuracy. The probe and the zero gauss chamber remains in the same temperature.

Moment measurement

Noise floor (emu RMS)
With single stage variable temperature option, 0.1 TC, 10 s/pt 1.25 μemu
Dynamic range
1 × 10-7 to 103 emu
Time constants (TC)
0.1, 0.3, 1.0, 3.0, or 10.0 s
Moment stability2
Better than ±0.05% of full scale/day for fixed coil geometry at constant field and temperature
Better than ±0.5%, or ±0.1% of full scale, fixed rotation angle and range, with sample replacement
Moment accuracy
Better than 1% of reading ±0.2% of full scale with a geometrically identical test sample and calibran

Measurement temperature range

80K to 400K and 300K to 1273K

Temp stability ±0.2 K
Temperature resolution 0.001 K

Sample Mass

0 to 10 g (higher mass can be accommodated with decreased performance)