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Magnetic proximity effect in magnetic-insulator/heavy-metal heterostructures across the compensation temperature

Published

Author(s)

Jackson Bauer, Patrick Quarterman, Alexander Grutter, Bharat Khurana, Subhajit Kundu, K. Mkhoyan, Julie A. Borchers, Caroline Ross

Abstract

The magnetic proximity effect in Pt and W thin films grown on Dy3Fe5O12 (DyIG) is examined at temperatures above and below the magnetic compensation temperature of the ferrimagnetic insulator. Polarized neutron reflectometry indicates that the proximity effect is positive in Pt/DyIG both above and below the compensation temperature, and x-ray magnetic circular dichroism shows a weak positive W magnetization below compensation in W/DyIG. This demonstrates a qualitative difference compared to heavy metal/ferrimagnetic rare earth–transition metal alloys, where the proximity-induced magnetism of the heavy metal changes sign at the compensation temperature. Reflectometry, structural, and spin transport measurements show that depositing the heavy metal film on the ferrimagnetic insulator in situ without breaking vacuum avoids the formation of a low density interfacial layer between the Pt and DyIG.
Citation
Physical Review B
Volume
104
Issue
9

Keywords

Ferrimagnetism, Complex Oxides, Neutron Scattering

Citation

Bauer, J. , Quarterman, P. , Grutter, A. , Khurana, B. , Kundu, S. , Mkhoyan, K. , Borchers, J. and Ross, C. (2021), Magnetic proximity effect in magnetic-insulator/heavy-metal heterostructures across the compensation temperature, Physical Review B, [online], https://doi.org/10.1103/physrevb.104.094403, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=932732 (Accessed April 17, 2024)
Created September 1, 2021, Updated March 22, 2024