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Magnetostatically driven domain replication in Ni/Co based perpendicular pseudo-spin-valves
KTH, Skolan för informations- och kommunikationsteknik (ICT), Material- och nanofysik. Univ Gothenburg.
KTH, Skolan för informations- och kommunikationsteknik (ICT), Material- och nanofysik.
Vise andre og tillknytning
2016 (engelsk)Inngår i: Journal of Physics D: Applied Physics, ISSN 0022-3727, E-ISSN 1361-6463, Vol. 49, nr 41, artikkel-id 415004Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The effect of ferromagnetic layer thickness on the temperature-dependent stray-field-induced coupling mechanism is investigated in perpendicular pseudo-spin-valves based on [Ni/Co](5)/ Cu/Co-[Ni/Co](n) (n = 2, 3, 4, and 5). Experimental observations show that as n increases from 2 to 4, the difference in coercivity and anisotropy between the two ([Ni/Co](5) or bottom-layer, and [Ni/Co](n) or top-layer) layers increases and the room temperature coupling strength decreases. The coupling then increases for n = 5, as the coercivity difference shrinks and anisotropy decreases. At reduced temperature, the layers start to decouple at a temperature, which increases with n from 2 to 4 and decreases for n = 5 via a stray-field domain-replication mechanism. Our results are useful to control the coupling in pseudo-spin-valves for practical applications in magnetoresistive devices.

sted, utgiver, år, opplag, sider
Institute of Physics (IOP), 2016. Vol. 49, nr 41, artikkel-id 415004
Emneord [en]
spintonics, perpendicular spin valve, magnetostatic coupling, domain replication
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-196390DOI: 10.1088/0022-3727/49/41/415004ISI: 000385383400004Scopus ID: 2-s2.0-84996587453OAI: oai:DiVA.org:kth-196390DiVA, id: diva2:1050353
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QC 20161128

Tilgjengelig fra: 2016-11-28 Laget: 2016-11-14 Sist oppdatert: 2017-11-29bibliografisk kontrollert

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Åkerman, Johan

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