Types of Measurements Using Magnetometers:
(ii) Temperature dependent measurements:
With increasing temperature, M-T data exhibit a large decrease in magnetization values and approach to zero, resulting in a transition. The thermal derivative of the data as shown in inset helps to identify the transition temperature (TC) clearly to some extent.
Quiz 31:
(Q31.1) Why do we need two secondary coils in the AC susceptibility measurements?
(Q31.2) Do you expect the change in the M-H loops by performing the following measurements (i) taking single virgin sample and performing M-H loop measurement at different temperatures from 4.2 K to 300 K, and (ii) taking virgin sample for every M-H measurement at each temperature between 4.2 K and 300 K?
(Q31.3) What is the role of applied magnetic field during the measurements of ZFC and FC curves?
(Q31.4) How can we find accurate value of Curie temperature for a ferromagnetic material?
(Q31.5) Do you expect the Curie temperature of the materials to change with the applied magnetic field strength? Why?