Journal article
Magnetization dynamics driven by displacement currents across a magnetic tunnel junction
- Abstract:
- Understanding the high-frequency transport characteristics of magnetic tunnel junctions (MTJs) is crucial for the development of fast-operating spintronics memories and radio frequency devices. Here, we present the study of a frequency-dependent capacitive current effect in CoFeB/MgO-based MTJs and its influence on magnetization dynamics using a time-resolved magneto-optical Kerr effect technique. In our device, operating at gigahertz frequencies, we find a large displacement current of the order of mA, which does not break the tunnel barrier of the MTJ. Importantly, this current generates an Oersted field and spin-orbit torque, inducing magnetization dynamics. Our discovery holds promise for building robust MTJ devices operating under high current conditions, also highlighting the significance of capacitive impedance in high-frequency magnetotransport techniques.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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(Preview, Version of record, pdf, 1.6MB, Terms of use)
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- Publisher copy:
- 10.1103/physrevapplied.22.024019
Authors
+ Engineering and Physical Sciences Research Council
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- Funder identifier:
- https://ror.org/0439y7842
- Grant:
- EP/V028049/1
- Publisher:
- American Physical Society
- Journal:
- Physical Review Applied More from this journal
- Volume:
- 22
- Issue:
- 2
- Article number:
- 24019
- Publication date:
- 2024-08-07
- Acceptance date:
- 2024-06-17
- DOI:
- EISSN:
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2331-7019
- Language:
-
English
- Pubs id:
-
2021133
- Local pid:
-
pubs:2021133
- Deposit date:
-
2024-08-11
Terms of use
- Copyright holder:
- Safeer et al
- Copyright date:
- 2024
- Rights statement:
- © The Author(s) 2024. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI.
- Licence:
- CC Attribution (CC BY)
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