Tunneling spectroscopy and magnon excitation in Co2FeAl/MgO/Co-Fe magnetic tunnel junctions

Ebke D, Drewello V, Schäfers M, Reiss G, Thomas A (2009)
APPLIED PHYSICS LETTERS 95(23).

Journal Article | Published | English

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Abstract
Magnetic tunnel junctions with the Heusler compound Co2FeAl as the soft electrode are prepared. Pinned Co-Fe is used as the hard reference electrode. The junctions show a high tunnel magnetoresistance ratio of 273% at 13 K. The electronic transport characteristics are investigated by tunneling spectroscopy-dI/dV and d(2)I/dV(2) are discussed. In the parallel magnetic state the tunneling spectra are asymmetric with respect to the bias voltage, with a pronounced bias-independent region. In the antiparallel state the dependence on bias voltage is much stronger and the curves are symmetric. The findings can be explained with a gap in the minority density of states of Co2FeAl. (C) 2009 American Institute of Physics. [doi: 10.1063/1.3272947]
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Ebke D, Drewello V, Schäfers M, Reiss G, Thomas A. Tunneling spectroscopy and magnon excitation in Co2FeAl/MgO/Co-Fe magnetic tunnel junctions. APPLIED PHYSICS LETTERS. 2009;95(23).
Ebke, D., Drewello, V., Schäfers, M., Reiss, G., & Thomas, A. (2009). Tunneling spectroscopy and magnon excitation in Co2FeAl/MgO/Co-Fe magnetic tunnel junctions. APPLIED PHYSICS LETTERS, 95(23).
Ebke, D., Drewello, V., Schäfers, M., Reiss, G., and Thomas, A. (2009). Tunneling spectroscopy and magnon excitation in Co2FeAl/MgO/Co-Fe magnetic tunnel junctions. APPLIED PHYSICS LETTERS 95.
Ebke, D., et al., 2009. Tunneling spectroscopy and magnon excitation in Co2FeAl/MgO/Co-Fe magnetic tunnel junctions. APPLIED PHYSICS LETTERS, 95(23).
D. Ebke, et al., “Tunneling spectroscopy and magnon excitation in Co2FeAl/MgO/Co-Fe magnetic tunnel junctions”, APPLIED PHYSICS LETTERS, vol. 95, 2009.
Ebke, D., Drewello, V., Schäfers, M., Reiss, G., Thomas, A.: Tunneling spectroscopy and magnon excitation in Co2FeAl/MgO/Co-Fe magnetic tunnel junctions. APPLIED PHYSICS LETTERS. 95, (2009).
Ebke, Daniel, Drewello, Volker, Schäfers, Markus, Reiss, Günter, and Thomas, Andy. “Tunneling spectroscopy and magnon excitation in Co2FeAl/MgO/Co-Fe magnetic tunnel junctions”. APPLIED PHYSICS LETTERS 95.23 (2009).
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