The coercive properties of magnetically uniaxial liquid-phase epitaxy garnet films were investigated between 10 K and the Néel temperature (TN≤500 K). Two independent methods, the results of which are nearly identical (magnetical response of oscillating domain walls and the method of coercive loops measured in a vibrating sample magnetometer), were used. Besides the usual domain-wall coercive field, Hdw, the critical coercive pressure, pdw, was also introduced as it describes in a direct way the interactions of the domain walls with the wall-pinning traps. Both Hdw and pdw were found to increase exponentially with decreasing temperature. Three different types of wall-pinning traps were identified in the sample and their strength, their rate of change with temperature, and their temperature range of activity were determined.
ASJC Scopus subject areas
- Physics and Astronomy(all)