Yang, Long, Shipp, Nicholas, Pu, Yong et al. (6 more authors) (2019) Enhanced magnetoresistance in NiFe/GaAs/Fe hybrid magnon valve. Applied Physics Letters. 072407. ISSN 0003-6951
Abstract
The magnon valve (MV), which consists of a one spacer layer sandwiched between two ferromagnetic layers, is a potential spintronic device. The operation principle of the magnon valve depends on magnon current propagating between the two magnetic layers. More specifically, the magnon current is induced in one ferromagnetic layer and then injects magnons into the other ferromagnetic layer through the spacer layer. During this process, the magnetization of the injected ferromagnetic layer is changed, leading to the different relative magnetic orientations of the two magnetic layers. Here, we investigated the electromagnetic property of the NiFe/GaAs/Fe magnon valve assisted by microwaves with various frequencies. We find that the magnetoresistance (MR) of the magnon valve increases up to 40% when applying an external 3.4GHz microwave. The increase in the magnetoresistance results from the magnon current propagating between the two ferromagnetic layers. The magnons induced by the external microwave share the same phase, and thus the magnon current can penetrate into a 70 μm thick GaAs by coherent propagation.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Dates: |
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Institution: | The University of York |
Academic Units: | The University of York > Faculty of Sciences (York) > Electronic Engineering (York) |
Depositing User: | Pure (York) |
Date Deposited: | 12 Jun 2020 14:40 |
Last Modified: | 16 Oct 2024 16:40 |
Published Version: | https://doi.org/10.1063/1.5093795 |
Status: | Published |
Refereed: | Yes |
Identification Number: | 10.1063/1.5093795 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:161854 |
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Filename: APL_2019_magnon_spin_valve.pdf
Description: APL 2019, magnon spin valve