High-frequency ultra-sensitive spin-torque diode based on Co-rich magnetic tunnel junction with in-plane magnetized free layer

Spin-torque diodes (STDs) based on magnetic tunnel junctions (MTJs) are newly developing spintronic devices. However, so far, the highly sensitive STDs reported in experiments have a low detection frequency, generally lower than 2 GHz, which limits the application of STDs in HF fields. Here, we deve...

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Bibliographic Details
Published in:Japanese Journal of Applied Physics 2023-10, Vol.62 (10), p.103003
Main Authors: Zhang, Like, Zeng, Kexin, Li, Shangkun, Zhou, Yan, Fang, Bin, Zeng, Zhongming
Format: Article
Language:English
Subjects:
Frequency locking
Magnetic anisotropy
magnetic tunnel junction
microwave detector
spin torque diode
spintronics
Torque
Tunnel junctions
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Summary:Spin-torque diodes (STDs) based on magnetic tunnel junctions (MTJs) are newly developing spintronic devices. However, so far, the highly sensitive STDs reported in experiments have a low detection frequency, generally lower than 2 GHz, which limits the application of STDs in HF fields. Here, we develop Co-rich MTJs to enhance in-plane magnetic anisotropy and demonstrate an in-plane magnetized HF ultra-sensitive STD. By selecting the proper field and using an injection locking mechanism, HF microwave detection close to 5 GHz can be realized with a sensitivity greater than 3700 mV mW −1 . This result may pave the way to developing spin-torque microwave detectors that are HF and highly sensitive.
ISSN:0021-4922
1347-4065
DOI:10.35848/1347-4065/acf485