Magnetic proximity effect in magnetic-insulator/heavy-metal heterostructures across the compensation temperature
Jackson J. Bauer, Patrick Quarterman, Alexander J. Grutter, Bharat Khurana, Subhajit Kundu, K. Andre Mkhoyan, J. A. Borchers, Caroline A. Ross
Abstract
Nonmagnetic heavy metals can develop a magnetic moment due to the proximity of a magnetic layer. Here, the sign of the proximity effect in Pt and W grown on the ferrimagnetic insulator Dy${}_{3}$Fe${}_{5}$O${}_{12}$ (DyIG) is examined. Polarized neutron reflectometry indicates the importance of a clean metal/garnet interface, and shows that the proximity effect in Pt/DyIG is positive above and below the DyIG compensation temperature, indicating a different origin compared to that of Pt adjacent to a ferrimagnetic metal alloy.
Topics & Concepts
FerrimagnetismMaterials scienceCondensed matter physicsNeutron reflectometryInsulator (electricity)MetalHeterojunctionMagnetic momentAlloyMagnetizationNeutronMetallurgyOptoelectronicsMagnetic fieldPhysicsNeutron scatteringSmall-angle neutron scatteringQuantum mechanicsMagnetic properties of thin filmsMagneto-Optical Properties and ApplicationsTheoretical and Computational Physics