The current potential of Co2MnSi Hensler alloy electrodes in magnetic tunnel junctions

Hütten A, Kammerer S, Schmalhorst J-M, Thomas A, Reiss G (2004)
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE 201(15): 3271-3279.

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Zeitschriftenaufsatz | Veröffentlicht | Englisch
Abstract / Bemerkung
We have integrated Co2MnSi as a representative of the full-Heusler compound family as one magnetic electrode into technological relevant magnetic tunnel junctions. The preparation strategy has been chosen so as to sputter Co2MnSi at room temperature onto a V-buffer layer, which assists in (110) texture formation, and to deposit the Al-barrier layer directly thereafter. After plasma oxidizing the Al-barrier layer subsequent annealing leads (1) to the texture formation and (2) to the appropriate atomic ordering within the Co2MnSi and (3) homogenizes the AlOx-barrier. The resulting magnetoresistance of the Co2MnSi containing magnetic tunnel junctions has been determined as a function of temperature. At a bias voltage of 1 mV a magnetoresistance of 94.6% has been realized at 20 K leading to a spin polarization of 65.5%. Furthermore, the microstructural as well as magnetic quality of the Co2MnSi/AlOx-barrier interface has been investigated in detail. Additionally, the problem of antisite formation at the Co2MnSi/AlOx-barrier interface is experimentally addressed by intercalating thin Co layers in between the Heusler layer and the AlOx barrier. (C) 2004 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.
Erscheinungsjahr
Zeitschriftentitel
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
Band
201
Zeitschriftennummer
15
Seite
3271-3279
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eISSN
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Hütten A, Kammerer S, Schmalhorst J-M, Thomas A, Reiss G. The current potential of Co2MnSi Hensler alloy electrodes in magnetic tunnel junctions. PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE. 2004;201(15):3271-3279.
Hütten, A., Kammerer, S., Schmalhorst, J. - M., Thomas, A., & Reiss, G. (2004). The current potential of Co2MnSi Hensler alloy electrodes in magnetic tunnel junctions. PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE, 201(15), 3271-3279. doi:10.1002/pssa.200405437
Hütten, A., Kammerer, S., Schmalhorst, J. - M., Thomas, A., and Reiss, G. (2004). The current potential of Co2MnSi Hensler alloy electrodes in magnetic tunnel junctions. PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE 201, 3271-3279.
Hütten, A., et al., 2004. The current potential of Co2MnSi Hensler alloy electrodes in magnetic tunnel junctions. PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE, 201(15), p 3271-3279.
A. Hütten, et al., “The current potential of Co2MnSi Hensler alloy electrodes in magnetic tunnel junctions”, PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE, vol. 201, 2004, pp. 3271-3279.
Hütten, A., Kammerer, S., Schmalhorst, J.-M., Thomas, A., Reiss, G.: The current potential of Co2MnSi Hensler alloy electrodes in magnetic tunnel junctions. PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE. 201, 3271-3279 (2004).
Hütten, Andreas, Kammerer, S, Schmalhorst, Jan-Michael, Thomas, Andy, and Reiss, Günter. “The current potential of Co2MnSi Hensler alloy electrodes in magnetic tunnel junctions”. PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE 201.15 (2004): 3271-3279.