Impact of direct exchange coupling via the insulator on the magnetic tunnel junction based molecular spintronics devices with competing molecule induced inter-electrode coupling
Abstract
The magnetic tunnel junction (MTJ) based molecular spintronics device (MTJMSD) approach is suitable for mass production. This approach provides solutions to fabrication difficulties related to reliably connecting molecular device elements to the ferromagnets (FMs). To producing MTJMSD, the molecular channels are bridged across the insulator of an MTJ testbed with exposed side edges. In an MTJMSD, two FMs are simultaneously connected by an insulator film and the molecular channels along the exposed sides. In our prior experimental studies, we observed that molecules could produce strong coupling between ferromagnets in the presence of the competing coupling via an insulator. In this paper, our Monte Carlo Simulation (MCS) was used to study the impact of coupling variation via insulator (a.k.a. Ji) on the magnetic properties of an MTJMSD. We studied the effect of Ji while varying the molecule induced antiferromagnetic exchange coupling. The ferromagnetic or antiferromagnetic nature and magnitude of Ji determined the resultant effect. Antiferromagnetic Ji enhanced the pre-existing antiferromagnetic molecular coupling effect. Ferromagnetic Ji competed with the opposite nature of antiferromagnetic molecular coupling. Our MCS may help to understand the impact of insulator thickness and defects on the molecular spintronics device performance and design process.
- Authors:
-
[1]
- Univ. Of The District Of Columbia, Washington, DC (United States). Mechanical Engineering. Center for Nanotechnology Research and Education
- Publication Date:
- Research Org.:
- University Of The District Of Columbia, Washington, DC (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA); National Science Foundation (NSF)
- OSTI Identifier:
- 1850414
- Alternate Identifier(s):
- OSTI ID: 1756495
- Grant/Contract Number:
- NA0003945; HRD-1914751
- Resource Type:
- Accepted Manuscript
- Journal Name:
- AIP Advances
- Additional Journal Information:
- Journal Volume: 11; Journal Issue: 1; Journal ID: ISSN 2158-3226
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; 71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Science & Technology - Other Topics; Materials Science; Physics; Molecular spintronics; Heisenberg exchange interaction
Citation Formats
Brown, Hayden, Grizzle, Andrew, D’Angelo, Christopher, Dahal, Bishnu R., and Tyagi, Pawan. Impact of direct exchange coupling via the insulator on the magnetic tunnel junction based molecular spintronics devices with competing molecule induced inter-electrode coupling. United States: N. p., 2021.
Web. doi:10.1063/9.0000225.
Brown, Hayden, Grizzle, Andrew, D’Angelo, Christopher, Dahal, Bishnu R., & Tyagi, Pawan. Impact of direct exchange coupling via the insulator on the magnetic tunnel junction based molecular spintronics devices with competing molecule induced inter-electrode coupling. United States. https://doi.org/10.1063/9.0000225
Brown, Hayden, Grizzle, Andrew, D’Angelo, Christopher, Dahal, Bishnu R., and Tyagi, Pawan. Mon .
"Impact of direct exchange coupling via the insulator on the magnetic tunnel junction based molecular spintronics devices with competing molecule induced inter-electrode coupling". United States. https://doi.org/10.1063/9.0000225. https://www.osti.gov/servlets/purl/1850414.
@article{osti_1850414,
title = {Impact of direct exchange coupling via the insulator on the magnetic tunnel junction based molecular spintronics devices with competing molecule induced inter-electrode coupling},
author = {Brown, Hayden and Grizzle, Andrew and D’Angelo, Christopher and Dahal, Bishnu R. and Tyagi, Pawan},
abstractNote = {The magnetic tunnel junction (MTJ) based molecular spintronics device (MTJMSD) approach is suitable for mass production. This approach provides solutions to fabrication difficulties related to reliably connecting molecular device elements to the ferromagnets (FMs). To producing MTJMSD, the molecular channels are bridged across the insulator of an MTJ testbed with exposed side edges. In an MTJMSD, two FMs are simultaneously connected by an insulator film and the molecular channels along the exposed sides. In our prior experimental studies, we observed that molecules could produce strong coupling between ferromagnets in the presence of the competing coupling via an insulator. In this paper, our Monte Carlo Simulation (MCS) was used to study the impact of coupling variation via insulator (a.k.a. Ji) on the magnetic properties of an MTJMSD. We studied the effect of Ji while varying the molecule induced antiferromagnetic exchange coupling. The ferromagnetic or antiferromagnetic nature and magnitude of Ji determined the resultant effect. Antiferromagnetic Ji enhanced the pre-existing antiferromagnetic molecular coupling effect. Ferromagnetic Ji competed with the opposite nature of antiferromagnetic molecular coupling. Our MCS may help to understand the impact of insulator thickness and defects on the molecular spintronics device performance and design process.},
doi = {10.1063/9.0000225},
journal = {AIP Advances},
number = 1,
volume = 11,
place = {United States},
year = {Mon Jan 11 00:00:00 EST 2021},
month = {Mon Jan 11 00:00:00 EST 2021}
}
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