Antiferromagnetic coupling across silicon regulated by tunneling currents

R. R. Gareev; M. Schmid; J. Vancea; C. H. Back; R. Schreiber; D. Bürgler; C. M. Schneider; F. Stromberg; H. Wende

doi:10.1063/1.3675872

Antiferromagnetic coupling across silicon regulated by tunneling currents

R. R. Gareev, M. Schmid, J. Vancea, C. H. Back, R. Schreiber, D. Bürgler, C. M. Schneider, F. Stromberg, H. Wende

Research output: Contribution to journal › Article › peer-review

1 Scopus citations

Abstract

We report on the enhancement of antiferromagnetic coupling in epitaxial Fe/Si/Fe structures by voltage-driven spin-polarized tunneling currents. Using the ballistic electron magnetic microscopy, we established that the hot-electron collector current reflects magnetization alignment and the magnetocurrent exceeds 200% at room temperature. The saturation magnetic field for the collector current corresponding to the parallel alignment of magnetizations rises up with the tunneling current, thus demonstrating stabilization of the antiparallel alignment and increasing antiferromagnetic coupling. We connect the enhancement of antiferromagnetic coupling with local dynamic spin torques mediated by spin-polarized tunneling electrons.

Original language	English
Article number	022406
Journal	Applied Physics Letters
Volume	100
Issue number	2
DOIs	https://doi.org/10.1063/1.3675872
State	Published - 9 Jan 2012
Externally published	Yes

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title = "Antiferromagnetic coupling across silicon regulated by tunneling currents",

abstract = "We report on the enhancement of antiferromagnetic coupling in epitaxial Fe/Si/Fe structures by voltage-driven spin-polarized tunneling currents. Using the ballistic electron magnetic microscopy, we established that the hot-electron collector current reflects magnetization alignment and the magnetocurrent exceeds 200% at room temperature. The saturation magnetic field for the collector current corresponding to the parallel alignment of magnetizations rises up with the tunneling current, thus demonstrating stabilization of the antiparallel alignment and increasing antiferromagnetic coupling. We connect the enhancement of antiferromagnetic coupling with local dynamic spin torques mediated by spin-polarized tunneling electrons.",

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AU - Gareev, R. R.

AU - Schmid, M.

AU - Vancea, J.

AU - Back, C. H.

AU - Schreiber, R.

AU - Bürgler, D.

AU - Schneider, C. M.

AU - Stromberg, F.

AU - Wende, H.

PY - 2012/1/9

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N2 - We report on the enhancement of antiferromagnetic coupling in epitaxial Fe/Si/Fe structures by voltage-driven spin-polarized tunneling currents. Using the ballistic electron magnetic microscopy, we established that the hot-electron collector current reflects magnetization alignment and the magnetocurrent exceeds 200% at room temperature. The saturation magnetic field for the collector current corresponding to the parallel alignment of magnetizations rises up with the tunneling current, thus demonstrating stabilization of the antiparallel alignment and increasing antiferromagnetic coupling. We connect the enhancement of antiferromagnetic coupling with local dynamic spin torques mediated by spin-polarized tunneling electrons.

AB - We report on the enhancement of antiferromagnetic coupling in epitaxial Fe/Si/Fe structures by voltage-driven spin-polarized tunneling currents. Using the ballistic electron magnetic microscopy, we established that the hot-electron collector current reflects magnetization alignment and the magnetocurrent exceeds 200% at room temperature. The saturation magnetic field for the collector current corresponding to the parallel alignment of magnetizations rises up with the tunneling current, thus demonstrating stabilization of the antiparallel alignment and increasing antiferromagnetic coupling. We connect the enhancement of antiferromagnetic coupling with local dynamic spin torques mediated by spin-polarized tunneling electrons.

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SN - 0003-6951

VL - 100

JO - Applied Physics Letters

JF - Applied Physics Letters

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M1 - 022406

ER -

Antiferromagnetic coupling across silicon regulated by tunneling currents

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