Magnetic Coupling in Y3Fe5 O12/Gd3Fe5 O12 Heterostructures
Becker S, Ren Z, Fuhrmann F, Ross A, Lord S, Ding S, Wu R, Yang J, Miao J, Klaui M, Jakob G (2021)
Publication Type: Journal article
Publication year: 2021
Journal
Book Volume: 16
Article Number: 014047
Journal Issue: 1
DOI: 10.1103/PhysRevApplied.16.014047
Abstract
Ferrimagnetic Y3Fe5O12 (YIG) is the prototypical material for studying magnonic properties due to its exceptionally low damping. By substituting the yttrium with rare earth elements that have a net magnetic moment, we can introduce an additional spin degree of freedom. Here, we study the magnetic coupling in epitaxial Y3Fe5O12/Gd3Fe5O12 (YIG/GIG) heterostructures grown by pulsed laser deposition. From bulk sensitive magnetometry and surface sensitive spin Seebeck effect and spin Hall magnetoresistance measurements, we determine the alignment of the heterostructure magnetization as a function temperature and external magnetic field. The ferromagnetic coupling between the Fe sublattices of YIG and GIG dominates the overall behavior of the heterostructures. Because of the temperature-dependent gadolinium moment, a magnetic compensation point of the total bilayer system can be identified. This compensation point shifts to lower temperatures with increasing YIG thickness due the parallel alignment of the iron moments. We show that we can control the magnetic properties of the heterostructures by tuning the thickness of the individual layers, opening up a large playground for magnonic devices based on coupled magnetic insulators. These devices could potentially control the magnon transport analogously to electron transport in giant magnetoresistive devices.
Involved external institutions
Johannes Gutenberg-Universität Mainz (JGU)
Germany (DE)
Peking University (PKU) / 北京大学
China (CN)
University of Science and Technology Beijing (USTB) / 北京科技大学
China (CN)
Germany (DE)
Peking University (PKU) / 北京大学
China (CN)
University of Science and Technology Beijing (USTB) / 北京科技大学
China (CN)
How to cite
APA:
Becker, S., Ren, Z., Fuhrmann, F., Ross, A., Lord, S., Ding, S.,... Jakob, G. (2021). Magnetic Coupling in Y3Fe5 O12/Gd3Fe5 O12 Heterostructures. Physical Review Applied, 16(1). https://doi.org/10.1103/PhysRevApplied.16.014047
MLA:
Becker, Sven, et al. "Magnetic Coupling in Y3Fe5 O12/Gd3Fe5 O12 Heterostructures." Physical Review Applied 16.1 (2021).
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