This title appears in the Scientific Report :
2009
Please use the identifier:
http://dx.doi.org/10.1209/0295-5075/88/47006 in citations.
Exchange splitting and bias-dependent transport in EuO spin filter tunnel barriers
Exchange splitting and bias-dependent transport in EuO spin filter tunnel barriers
We report on transport measurements in EuO-based tunnel junctions, studying the characteristic features of spin filter tunneling in magnetic insulators. Current-voltage (I-V) curves show a unique voltage dependence that reveals the interplay between direct and spin-selective Fowler-Nordheim (FN) tun...
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Personal Name(s): | Müller, M. |
---|---|
Miao, G.-X. / Moodera, J.S. | |
Contributing Institute: |
Elektronische Eigenschaften; IFF-9 |
Published in: | epl, 88 (2009) S. 47006 |
Imprint: |
Les Ulis
EDP Sciences
2009
|
Physical Description: |
47006 |
DOI: |
10.1209/0295-5075/88/47006 |
Document Type: |
Journal Article |
Research Program: |
Grundlagen für zukünftige Informationstechnologien |
Series Title: |
Europhysics Letters
88 |
Subject (ZB): | |
Publikationsportal JuSER |
We report on transport measurements in EuO-based tunnel junctions, studying the characteristic features of spin filter tunneling in magnetic insulators. Current-voltage (I-V) curves show a unique voltage dependence that reveals the interplay between direct and spin-selective Fowler-Nordheim (FN) tunneling. Successive onsets of FN tunneling give direct evidence for a spin filtering effect, without relying on the use of external magnetic fields for spin detection. The variation of the effective tunnel barrier height below the Curie temperature was extracted from temperature-dependent I-V characteristics, and systematically correlates with the spontaneous magnetization of EuO. The magnitude of the exchange splitting was deduced and allows the evaluation of spin filter efficiency of EuO spin filter tunnel barriers by fully electrical means. Copyright (C) EPLA, 2009 |