Influence of MgO Barrier Quality on Spin-Transfer Torque in Magnetic Tunnel Junctions
Abstract
Here, we studied the bias dependence of spin transfer torque in the MgO-based magnetic tunnel junction using a field-modulated spin torque ferromagnetic resonance measurement technique for three devices with tunneling magnetoresistances (MRs) of 60%, 67%, and 73%, respectively. The devices with a lower MR ratio showed the presence of multiple modes, while the device with higher MR (73%) showed a single resonance mode. We found a lower out-of-plane torkance in our devices compared to the in-plane torkance. The out-of-plane torque is linear with applied bias, while the bias dependence of in-plane torque shows a strong dependence on the MR ratio and hence the barrier quality.
- Authors:
-
- Indian Inst. of Technology (IIT), Delhi (India). Dept. of Physics
- Argonne National Lab. (ANL), Argonne, IL (United States). Materials Science Division
- Univ. of Gothenburg (Sweden). Dept. of Physics; KTH Royal Inst. of Technology, Stockholm (Sweden). Materials and NanoPhysics, School of Engineering Sciences
- Publication Date:
- Research Org.:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); India Department of Science and Technology; Swedish Foundation for Strategic Research (SSF)
- OSTI Identifier:
- 1419948
- Alternate Identifier(s):
- OSTI ID: 1416222
- Grant/Contract Number:
- AC02-06CH11357
- Resource Type:
- Journal Article: Accepted Manuscript
- Journal Name:
- Applied Physics Letters
- Additional Journal Information:
- Journal Volume: 112; Journal Issue: 2; Journal ID: ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 42 ENGINEERING; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Spintronics; Magnetic tunnel junctions; Ferromagnetic resonance; Magnetic ordering; Electrical properties
Citation Formats
Tiwari, Dhananjay, Sharma, Raghav, Heinonen, O. G., Akerman, J., and Muduli, P. K. Influence of MgO Barrier Quality on Spin-Transfer Torque in Magnetic Tunnel Junctions. United States: N. p., 2018.
Web. doi:10.1063/1.5005893.
Tiwari, Dhananjay, Sharma, Raghav, Heinonen, O. G., Akerman, J., & Muduli, P. K. Influence of MgO Barrier Quality on Spin-Transfer Torque in Magnetic Tunnel Junctions. United States. doi:10.1063/1.5005893.
Tiwari, Dhananjay, Sharma, Raghav, Heinonen, O. G., Akerman, J., and Muduli, P. K. Mon .
"Influence of MgO Barrier Quality on Spin-Transfer Torque in Magnetic Tunnel Junctions". United States. doi:10.1063/1.5005893. https://www.osti.gov/servlets/purl/1419948.
@article{osti_1419948,
title = {Influence of MgO Barrier Quality on Spin-Transfer Torque in Magnetic Tunnel Junctions},
author = {Tiwari, Dhananjay and Sharma, Raghav and Heinonen, O. G. and Akerman, J. and Muduli, P. K.},
abstractNote = {Here, we studied the bias dependence of spin transfer torque in the MgO-based magnetic tunnel junction using a field-modulated spin torque ferromagnetic resonance measurement technique for three devices with tunneling magnetoresistances (MRs) of 60%, 67%, and 73%, respectively. The devices with a lower MR ratio showed the presence of multiple modes, while the device with higher MR (73%) showed a single resonance mode. We found a lower out-of-plane torkance in our devices compared to the in-plane torkance. The out-of-plane torque is linear with applied bias, while the bias dependence of in-plane torque shows a strong dependence on the MR ratio and hence the barrier quality.},
doi = {10.1063/1.5005893},
journal = {Applied Physics Letters},
issn = {0003-6951},
number = 2,
volume = 112,
place = {United States},
year = {2018},
month = {1}
}
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Cited by: 1 work
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Figures / Tables:
Figure 1: (a) The MTJ resistance as a function of applied magnetic fi eld for varying MR ratios of 60%, 67% and 73%. The measurement was performed at in-plane field angle of θ = 180°. (b) ΔRdc variation with applied dc bias voltage.
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Figures/Tables have been extracted from DOE-funded journal article accepted manuscripts.