Are insulating LiF barriers relevant for spin-polarized tunnelling applications? Insights from first-principles calculations

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F16%3A10327276" target="_blank" >RIV/00216208:11320/16:10327276 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1088/0022-3727/49/30/305302" target="_blank" >http://dx.doi.org/10.1088/0022-3727/49/30/305302</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/0022-3727/49/30/305302" target="_blank" >10.1088/0022-3727/49/30/305302</a>

Result language
angličtina
Original language name
Are insulating LiF barriers relevant for spin-polarized tunnelling applications? Insights from first-principles calculations
Original language description
Structural, electronic and magnetic properties of Fe/LiF (0 0 1) interfaces and spin-polarized transport properties of Fe/LiF/Fe (001) heterostructures are studied by means of self-consistent atomistic first-principles calculations. Total energy calculations performed for various interfacial geometries show that the Fe/LiF (001) interface with Fe atoms located above anionic sites is the most stable. F-Fe and Li-Fe substitutional intermixings at Fe/LiF (001) interfaces are not energetically favourable, but F accumulation in the interstitial void spaces at Fe/LiF (001) interfaces is possible. The magnetism of interfacial Fe atoms is robust. The majority-spin ferromagnetic state conductances decay rapidly with respect to the barrier thickness, while the minority-spin ones have very large contributions at specific hot spots and play a major role in the transport properties. Depending on the interfacial geometry, tunnelling magnetoresistance ratios ranging from 460%-2400% are evidenced. Interfacial interdiffusion can affect the transport properties. The exchange coupling between Fe electrodes through LiF barriers is negligible.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BM - Solid-state physics and magnetism
OECD FORD branch
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Project
<a href="/en/project/GJ15-08740Y" target="_blank" >GJ15-08740Y: Spin current generation on a femtosecond timescale</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2016
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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