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Cited by 444

The DOI matches its Crossref record; 28 of the 28 references it cites were found in a registry or an index.

Thermally driven spin injection from a ferromagnet into a non-magnetic metal

Open access
Slachter, A., Bakker, F. L., Adam, J-P., van Wees, B. J.·2010·Nature Physics

Abstract

The experimental demonstration of heat currents driving the injection of spins from a ferromagnetic into a non-magnetic metal establishes a new source of pure spin currents. The approach might provide an alternative mechanism for switching processes in memory devices and for other ‘spintronics’ applications. Creation, manipulation and detection of spin-polarized carriers are the key elements of spin-based electronics1,2. Most practical devices3,4,5 use a perpendicular geometry in which the spin currents are accompanied by charge currents. In recent years, new sources of pure spin currents (that is, transport of spin angular momentum without charge currents) have been demonstrated6,7,8,9 and applied10,11,12. Here we demonstrate a conceptually new source of pure spin current driven by the flow of heat across the interface between a ferromagnet and a non-magnetic metal. This spin current is generated because, in a ferromagnet, the Seebeck effect—which describes the generation of a voltage as a result of a temperature gradient—is spin dependent13,14. We studied this new source of spin currents experimentally in a non-local lateral geometry and developed a three-dimensional model that describes the heat, charge and spin transport in this geometry, enabling us to quantify this process15. We obtain a spin-dependent Seebeck coefficient for Permalloy of −3.8 μV K−1, suggesting that thermally driven spin injection is a feasible alternative for electrical spin injection in, for example, spin-transfer-torque experiments16.

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Metadata

Authors
Slachter, A., Bakker, F. L., Adam, J.-P., & van Wees, B. J.
Venue
Nature Physics
Published
2010-09-19
Volume
6
Issue
11
Pages
879-882
ISSN
  • 1745-2473 (ISSN-L)
  • 1745-2481
OpenAlex
W2045510319
Cited by
444
References
28
FWCI
14.82
Type
journal article
Language
en
Open access
hybrid

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