Fe/MgO/Fe (100) textured tunnel junctions exhibiting spin polarization features of single crystal junctions

Crystallographic and spin polarized transport properties of (100) textured and (100) epitaxial Fe/MgO/Fe magnetic tunnel junctions are compared. Strong similarities in the transport properties show that structural coherence and magnetic quality at the 25 nm grain scale in textured junctions are suff...

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Bibliographic Details
Published in:arXiv.org 2012-12
Main Authors: Duluard, A, Negulescu, B, Bellouard, C, Hehn, M, Lacour, D, Y Lu, Lengaigne, G, Montaigne, F, Robert, S, Suire, S, Tiusan, C
Format: Article
Language:English
Subjects:
Coherence
Crystallography
Magnesium oxide
Magnetic properties
Polarization (spin alignment)
Single crystals
Transport properties
Tunnel junctions
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Summary:Crystallographic and spin polarized transport properties of (100) textured and (100) epitaxial Fe/MgO/Fe magnetic tunnel junctions are compared. Strong similarities in the transport properties show that structural coherence and magnetic quality at the 25 nm grain scale in textured junctions are sufficient to issue signatures of the spin polarized transport specific to a single crystal junction. This demonstrates that the lateral coherence of the Bloch tunneling wave function is identically limited in both systems. Our analysis leads to model the textured tunnel junction as a juxtaposition of nanometer sized single crystal junctions, placed in parallel.
ISSN:2331-8422
DOI:10.48550/arxiv.1111.6439