Please use this identifier to cite or link to this item: https://doi.org/10.1021/acsami.8b21421
Title: MECHANICAL STRAIN MANIPULATION OF EXCHANGE BIAS FIELD AND SPIN DYNAMICS IN FECO/IRMN MULTILAYERS GROWN ON FLEXIBLE SUBSTRATES
Authors: Zhang, Zhi
Liu, Er
Zhang, Wen 
Wong, Ping Kwan Johnny 
Xu, Zhan
Hu, Fang
Li, Xia
Tang, Jiaxuan
Wee, Andrew Thye Shen 
Xu, Feng
Keywords: Science & Technology
Technology
Nanoscience & Nanotechnology
Materials Science, Multidisciplinary
Science & Technology - Other Topics
Materials Science
exchange bias
ferromagnetic resonance
spin dynamics
flexible spintronics
strain
FERROMAGNETIC-RESONANCE
ORBIT TORQUE
MAGNETIZATION
ANISOTROPY
Issue Date: 27-Feb-2019
Publisher: AMER CHEMICAL SOC
Citation: Zhang, Zhi, Liu, Er, Zhang, Wen, Wong, Ping Kwan Johnny, Xu, Zhan, Hu, Fang, Li, Xia, Tang, Jiaxuan, Wee, Andrew Thye Shen, Xu, Feng (2019-02-27). MECHANICAL STRAIN MANIPULATION OF EXCHANGE BIAS FIELD AND SPIN DYNAMICS IN FECO/IRMN MULTILAYERS GROWN ON FLEXIBLE SUBSTRATES 11 (8) : 8258-8265. ScholarBank@NUS Repository. https://doi.org/10.1021/acsami.8b21421
Abstract: © 2019 American Chemical Society. As a key effect in spintronic devices, exchange bias has attracted tremendous attention. Various approaches have been attempted for optimizing this effect, among which the application of strain in flexible exchange-biased systems is promising, but little significant improvement has been reported. Here, we demonstrate encouraging progress in this field. With a pure mechanical compressive strain of â'6.26‰ applied to the flexible polyimide (PI) substrate, distinct enhancement of 900% in the bias field (from 20 to 200 Oe) is achieved for the exchange-biased (FeCo/IrMn) 3 /Ta multilayers grown on top of a flexible PI substrate, accompanied by a notable decrease in the Gilbert damping parameter from 0.02 to 0.008, signifying an improved exchange bias effect as well as a potentially reduced switching current density. The underlying mechanism is investigated by a systematic ferromagnetic resonance study, suggesting that the angle between the unidirectional and uniaxial magnetic easy axes plays an important role, which may be controlled by adjusting the layer number. This work offers an efficient strategy for tuning the exchange bias effect via applying appropriate mechanical strain on a multiperiodic exchange bias multilayered system, opening up an avenue for tailoring the magnetic properties of flexible spintronic devices.
URI: https://scholarbank.nus.edu.sg/handle/10635/155417
ISSN: 1944-8244
1944-8252
DOI: 10.1021/acsami.8b21421
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