Automated Vibrating Sample Magnetometer with a Puzei Electromagnet
The setup was developed and fabricated at the Laboratory of the Resonance Properties of Magnetically Ordered Media, Kirensky Institute of Physics for studying static magnetic properties of different materials, from ferro- and ferrimagnets to media with low magnetic impurity concentrations. Owing to the wide dynamic operating range, the setup is suitable for investigations of both magnetic samples with large sizes and thin-film structures.
The setup allows obtaining dependences of two types: (i) magnetic moment vs temperature m(T) in dc magnetic field and (ii) magnetic moment vs field m(H) at fixed temperature. In addition, angular dependences of magnetic moment m(φ) can be measured.
Data from a magnetic induction meter (channel H), temperature sensor (channel T), and magnetometer recording circuit (channel m) are supplied to a special controller and, then, to a PC. Measurement data are automated with the use of a program written in Delphi. In the course of experiments, measurement data are written to a PC hard disk and graphically visualized on a monitor.
Specification
- dynamic range 5 · 10–6−100 G cm3;
- magnetic fields 0− ±25 000 Oe;
- sample temperature 77−370 K.
The magnetometer was developed by Dmitrii A. Velikanov, Cand. Phys.-Math. Sci., Senior Researcher.
PATENTABILITY AND PATENT PROTECTION:
1. D. A. Velikanov, Vibrating sample magnetometer, RF Patent No. 2339965, Byull. Izobret., No. 33 (2008).
2. D. A. Velikanov, Vibrating sample magnetometer, RF Patent No. 2341810, Byull. Izobret., No. 35 (2008).
3. D. A. Velikanov, VSMagnetometer, Computer program, RF State Registration Certificate No. 2013618553 (2013).
Magnetic-field dependences of the magnetic moment for a super-strong NdFeB magnet
and Ni/Ge thin-film structure measured on the vibrating sample magnetometer