Evaluation of Minority and Majority Spin Band Energies of Ferromagnetic GdN thin film using Optical Absorption Spectroscopy

摘要

Temperature dependent optical Tauc plots of AlN/GdN/AlN heterostructures have showed two optically induced transitions, and those optical transitions could be attributed to the minority and majority spin band energy. In contrast, temperature dependent magnetization measurements of GdN thin film provide direct evidence of spin ordering below 39 K, and which is also evidenced by Arrott plots.