Enhancement technique in the measurement of alternating current susceptibility

S. Mukherjee, A. Chakravarti, R. Ranganathan
1997 Review of Scientific Instruments  
The enhancement technique is basically the measurement of the ac susceptibility in the presence of a second biasing field ͑pulsed dc or ac͒. This useful technique will be adopted for modification of the ac susceptometer. A proportional integral derivative controller, commonly used in temperature controllers, and a voltage to current converter with variable gain and sign, play special roles in this measurement technique. A second sinusoidal ac field ͑in addition to the measuring field͒ is used
more » ... the biasing field. The technique is a very useful one to obtain quantitative information about domain wall pinning, domain contribution to magnetization, etc. in the magnetic systems.
doi:10.1063/1.1148204 fatcat:vhmnvqs3ljfixh477lzglszawm