Fully epitaxial Fe(110)/MgO(111)/Fe(110) magnetic tunnel junctions: Growth,transport, and spin filtering properties

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2008
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Hauch, Jan O.
Fraune, Michael
Turban, Pascal
Guerrero, Ruben
Aliev, Farkhad G.
Mayer, Joachim
Güntherodt, Gernot
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Applied physics letters. 2008, 93(8), 3512. Available under: doi: 10.1063/1.2976546
Zusammenfassung

Fully epitaxial Fe(110)/MgO(111)/Fe(110) magnetic tunnel junctions(MTJs)( have been tested with respect to symmetry-enforced spin filtering. The Fe(110) electrodes exhibit ∑1↑ and ∑1↓ spin states, both crossing the Fermi level, but with a group velocity about 50% smaller for the minority states compared to the majority ones. These epitaxial but symmetry-mismatched MTJs yield tunneling magnetoresistance (TMR) values of 54% at 1.5 K and 28% at room temperature. The TMR value and the estimated tunneling spin polarization are consistent with a partial spin filtering due to the ∑1↑ states partially compensated by the ∑1↓ states.

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ISO 690HAUCH, Jan O., Mikhail FONIN, Michael FRAUNE, Pascal TURBAN, Ruben GUERRERO, Farkhad G. ALIEV, Joachim MAYER, Ulrich RÜDIGER, Gernot GÜNTHERODT, 2008. Fully epitaxial Fe(110)/MgO(111)/Fe(110) magnetic tunnel junctions: Growth,transport, and spin filtering properties. In: Applied physics letters. 2008, 93(8), 3512. Available under: doi: 10.1063/1.2976546
BibTex
@article{Hauch2008Fully-9141,
  year={2008},
  doi={10.1063/1.2976546},
  title={Fully epitaxial Fe(110)/MgO(111)/Fe(110) magnetic tunnel junctions: Growth,transport, and spin filtering properties},
  number={8},
  volume={93},
  journal={Applied physics letters},
  author={Hauch, Jan O. and Fonin, Mikhail and Fraune, Michael and Turban, Pascal and Guerrero, Ruben and Aliev, Farkhad G. and Mayer, Joachim and Rüdiger, Ulrich and Güntherodt, Gernot},
  note={Article Number: 3512}
}
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