Temperature dependence of interlayer coupling in perpendicular magnetic tunnel junctions with GdOx barriers
Abstract
Perpendicular magnetic tunnel junctions with GdOX tunneling barriers have shown a unique voltage controllable interlayer magnetic coupling effect. Here, we investigate the quality of the GdOX barrier and the coupling mechanism in these junctions by examining the temperature dependence of the tunneling magnetoresistance and the interlayer coupling from room temperature down to 11 K. The barrier is shown to be of good quality with the spin independent conductance only contributing a small portion, 14%, to the total room temperature conductance, similar to AlOX and MgO barriers. The interlayer coupling, however, shows an anomalously strong temperature dependence including sign changes below 80 K. This non-trivial temperature dependence is not described by previous models of interlayer coupling and may be due to the large induced magnetic moment of the Gd ions in the barrier.
- Authors:
-
- Univ. of Arizona, Tucson, AZ (United States). Dept. of Physics
- Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Quantum Condensed Matter Division
- Publication Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Basic Energy Sciences (BES); National Science Foundation (NSF)
- OSTI Identifier:
- 1419001
- Alternate Identifier(s):
- OSTI ID: 1420360; OSTI ID: 1465045
- Grant/Contract Number:
- AC05-00OR22725; 1337371
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Applied Physics Letters
- Additional Journal Information:
- Journal Volume: 112; Journal Issue: 7; Journal ID: ISSN 0003-6951
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE
Citation Formats
Newhouse-Illige, T., Xu, Y. H., Liu, Y. H., Huang, S., Kato, H., Bi, C., Xu, M., LeRoy, B. J., and Wang, W. G. Temperature dependence of interlayer coupling in perpendicular magnetic tunnel junctions with GdOx barriers. United States: N. p., 2018.
Web. doi:10.1063/1.5002586.
Newhouse-Illige, T., Xu, Y. H., Liu, Y. H., Huang, S., Kato, H., Bi, C., Xu, M., LeRoy, B. J., & Wang, W. G. Temperature dependence of interlayer coupling in perpendicular magnetic tunnel junctions with GdOx barriers. United States. https://doi.org/10.1063/1.5002586
Newhouse-Illige, T., Xu, Y. H., Liu, Y. H., Huang, S., Kato, H., Bi, C., Xu, M., LeRoy, B. J., and Wang, W. G. Tue .
"Temperature dependence of interlayer coupling in perpendicular magnetic tunnel junctions with GdOx barriers". United States. https://doi.org/10.1063/1.5002586. https://www.osti.gov/servlets/purl/1419001.
@article{osti_1419001,
title = {Temperature dependence of interlayer coupling in perpendicular magnetic tunnel junctions with GdOx barriers},
author = {Newhouse-Illige, T. and Xu, Y. H. and Liu, Y. H. and Huang, S. and Kato, H. and Bi, C. and Xu, M. and LeRoy, B. J. and Wang, W. G.},
abstractNote = {Perpendicular magnetic tunnel junctions with GdOX tunneling barriers have shown a unique voltage controllable interlayer magnetic coupling effect. Here, we investigate the quality of the GdOX barrier and the coupling mechanism in these junctions by examining the temperature dependence of the tunneling magnetoresistance and the interlayer coupling from room temperature down to 11 K. The barrier is shown to be of good quality with the spin independent conductance only contributing a small portion, 14%, to the total room temperature conductance, similar to AlOX and MgO barriers. The interlayer coupling, however, shows an anomalously strong temperature dependence including sign changes below 80 K. This non-trivial temperature dependence is not described by previous models of interlayer coupling and may be due to the large induced magnetic moment of the Gd ions in the barrier.},
doi = {10.1063/1.5002586},
journal = {Applied Physics Letters},
number = 7,
volume = 112,
place = {United States},
year = {Tue Feb 13 00:00:00 EST 2018},
month = {Tue Feb 13 00:00:00 EST 2018}
}
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Figures / Tables:
FIG. 1: TMR curves of a representative sample at RT (solid black) and 11 K (open red).
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