Magnetic torque

The magnetic torque is preferably measured in magnets type A or B, but can be done in magnets D and E as well. For that we use piezoresistive microcantilevers (PRC120) together with a Wheatstone bridge and a low-noise amplifier. This setup ensures a large sensitivity (~10-13 Am2 [1]).

The size of the cantilever is 50 µm x 120 µm, which requires samples of similar size.

We are able to measure two samples on two cantilevers at a time. The samples can be rotated in-situ around one axis.
The available temperature ranges from 300 K down to 1.3 K. Lower temperatures down to ~0.6 K are possible using a 3He system.

Magneto torque - cantilever

Typical sample attached to a cantilever (left) with a reference cantilever on the right.

Magnetic torque - shifted curves

Measurement Example: de-Haas-van-Alphen effect in CePt2In7

Magnetic torque - Oscillations

Measurement Example: Oscillating part of the measured torque of CePt2In7.

[1] E. Ohmichi and T. Osada, Rev. Sci. Instr. 73, 3022 (2002)