Micromag Model 3900 VSM

sample rod of PMC Micromag Model 3900 VSM
The PMC (now Lakeshore) Micromag Model 3900 Vibrating Sample Magnetometer (VSM) is capable of measuring magnetization in magnetic fields up to 1.25 T. It has a sensitivity of 0.5 μ emu and can take samples up to the size of a P15 plastic box. I have sample holders for standard P15 boxes (Vol ~ 5.3 cc) and gel caps. The instrument is very versatile. Standard measurements include hysteresis loops, remanence curves, demagnetization curves, FORC diagrams and probably a few more things.
I don’t have a cryostat or furnace, so measurements are limited to room-temperature.
More information on the instrument can be found here.


sample holder of a JR6 spinner magnetometer

The AGICO JR6 spinner magnetometer has a sensitivity of 2 x 10-6 A/m (at high speed) and measures a sample in less than a minute. Our instrument is controlled by custom-written software, which is better suited for rock-magnetic applications. It is a workhorse in the lab with students measuring mostly soil and lake sediment samples.