Abstract
We investigated the temperature dependence of the saturation magnetization and magnetic anisotropy constant of with an ilmenite structure, which is known as an orbital ferrimagnet. Because of strong antiferromagnetic coupling between the spin and spin in , the net magnetic moment is considered to originate only from the orbital angular momentum [(OAM); of . Experimental results for epitaxial films clearly show that is proportional to for a wide temperature range up to the transition temperature, suggesting that is proportional to . An electron theory based on the cluster model for and the OAM of at 0 K also indicates that is proportional to the OAM and to the orbital angular anisotropy of .
- Received 19 October 2019
DOI:https://doi.org/10.1103/PhysRevB.100.224425
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