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Thermoelectrical ma...
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Kadigrobov, Anatoli M.,1937Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)
(författare)
Thermoelectrical manipulation of nanomagnets
- Artikel/kapitelEngelska2010
Förlag, utgivningsår, omfång ...
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AIP Publishing,2010
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printrdacarrier
Nummerbeteckningar
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LIBRIS-ID:oai:DiVA.org:kth-29461
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https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-29461URI
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https://doi.org/10.1063/1.3437054DOI
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https://research.chalmers.se/publication/123519URI
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https://gup.ub.gu.se/publication/123519URI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:art swepub-publicationtype
Anmärkningar
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QC 20110208
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We investigate the interplay between the thermodynamic properties and spin-dependent transport in a mesoscopic device based on a magnetic multilayer (F/f/F), in which two strongly ferromagnetic layers (F) are exchange-coupled through a weakly ferromagnetic spacer (f) with the Curie temperature in the vicinity of room temperature. We show theoretically that the Joule heating produced by the spin-dependent current allows a spin-thermoelectronic control of the ferromagnetic-to-paramagnetic (f/N) transition in the spacer and, thereby, of the relative orientation of the outer F-layers in the device (spin-thermoelectric manipulation of nanomagnets). Supporting experimental evidence of such thermally-controlled switching from parallel to antiparallel magnetization orientations in F/f(N)/F sandwiches is presented. Furthermore, we show theoretically that local Joule heating due to a high concentration of current in a magnetic point contact or a nanopillar can be used to reversibly drive the weakly ferromagnetic spacer through its Curie point and thereby exchange couple and decouple the two strongly ferromagnetic F-layers. For the devices designed to have an antiparallel ground state above the Curie point of the spacer, the associated spin-thermionic parallel to antiparallel switching causes magnetoresistance oscillations whose frequency can be controlled by proper biasing from essentially dc to GHz. We discuss in detail an experimental realization of a device that can operate as a thermomagnetoresistive switch or oscillator.
Ämnesord och genrebeteckningar
Biuppslag (personer, institutioner, konferenser, titlar ...)
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Andersson, SebastianKTH,Nanostrukturfysik(Swepub:kth)u1d0pic8
(författare)
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Radic, Danko,1970Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)(Swepub:cth)dankor
(författare)
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Shekhter, Robert I.,1947Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)(Swepub:gu)xshero
(författare)
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Jonson, Mats,1947Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU)(Swepub:gu)xjomat
(författare)
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Korenivski, VladislavKTH,Nanostrukturfysik(Swepub:kth)u17mjbwi
(författare)
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Andersson, Stefan,1973
(författare)
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Göteborgs universitetInstitutionen för fysik (GU)
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Journal of Applied Physics: AIP Publishing107:12, s. 123706-0021-89791089-7550
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