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Current-driven thermo-magnetic switching in magnetic tunnel junctions
KTH, School of Engineering Sciences (SCI), Applied Physics, Nanostructure Physics. National Academy of Sciences of Ukraine, Ukraine.ORCID iD: 0000-0001-8754-3152
KTH, School of Engineering Sciences (SCI), Applied Physics, Nanostructure Physics. National Academy of Sciences of Ukraine, Ukraine.
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2017 (English)In: Applied Physics Letters, ISSN 0003-6951, E-ISSN 1077-3118, Vol. 111, no 26, article id 262401Article in journal (Refereed) Published
Abstract [en]

We investigate switching of magnetic tunnel junctions (MTJs) driven by the thermal effect of the transport current through the junctions. The switching occurs in a specially designed composite free layer, which acts as one of the MTJ electrodes, and is due to a current-driven ferro-to-paramagnetic Curie transition with the associated exchange decoupling within the free layer leading to magnetic reversal. We simulate the current and heat propagation through the device and show how heat focusing can be used to improve the power efficiency. The Curie-switch MTJ demonstrated in this work has the advantage of being highly tunable in terms of its operating temperature range, conveniently to or just above room temperature, which can be of technological significance and competitive with the known switching methods using spin-transfer torques.

Place, publisher, year, edition, pages
American Institute of Physics (AIP), 2017. Vol. 111, no 26, article id 262401
National Category
Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-221372DOI: 10.1063/1.5009577ISI: 000418947200019Scopus ID: 2-s2.0-85040075209OAI: oai:DiVA.org:kth-221372DiVA, id: diva2:1175094
Funder
Swedish Research Council, 2014-4548
Note

QC 20180117

Available from: 2018-01-17 Created: 2018-01-17 Last updated: 2018-01-17Bibliographically approved

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Korenivski, Vladislav

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Kravets, AnatoliiPolishchuk, DmytroKorenivski, Vladislav
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