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Voltage Modulated Magnetic Anisotropy of Rare Earth Iron Garnet Thin Films on a Piezoelectric Substrate

Published

Author(s)

Miela Gross, Walid Al Misba, Kensuke Hayashi, Dhritiman Bhattacharya, Daniel Gopman, Jayasimha Atulasimha, Caroline Ross

Abstract

Voltage-tuning of the magnetic anisotropy is dempnstrated in ferrimagnetic insulating rare earth iron garnets on a piezoelectric substrate, (011)-oriented PMN-PT. A yttrium-substituted dysprosium iron garnet (YDyIG) film 42 nm thick is grown via pulsed laser deposition followed by a rapid thermal anneal to crystallize the garnet into 5 µm diameter grains. The polycrystalline film is magnetically isotropic in the film plane, with total anisotropy dominated by shape and magnetoelastic contributions. Application of an electric field perpendicular to the substrate breaks the in-plane symmetry leading to the development of an in-plane easy axis along [100] and an intermediate axis along [011 ̅]. The results are explained in terms of the piezoelectric remanent strain caused by poling the substrate, which is transferred to the YDyIG and modulates the magnetoelastic anisotropy.
Citation
Applied Physics Letters

Citation

Gross, M. , Misba, W. , Hayashi, K. , Bhattacharya, D. , Gopman, D. , Atulasimha, J. and Ross, C. (2022), Voltage Modulated Magnetic Anisotropy of Rare Earth Iron Garnet Thin Films on a Piezoelectric Substrate, Applied Physics Letters, [online], https://doi.org/10.1063/5.0128842, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=935475 (Accessed February 24, 2024)
Created December 19, 2022, Updated March 6, 2023