Magnetostatically driven domain replication in Ni/Co based perpendicular pseudo-spin-valves

Sökning: WFRF:(Sani M) > Magnetostatically d...

QC 20161128
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.

Hamdi, M. (författare)
Chung, S.KTH,Material- och nanofysik,Univ Gothenburg(Swepub:kth)- (författare)
Redjai Sani, SohrabKTH,Material- och nanofysik(Swepub:kth)u12m8jry (författare)
Åkerman, Johan,1970KTH,Gothenburg University,Göteborgs universitet,Institutionen för fysik (GU),Department of Physics (GU),Material- och nanofysik,Univ Gothenburg(Swepub:kth)u13m1xx2 (författare)
KTHMaterial- och nanofysik (creator_code:org_t)

Ingår i:Journal of Physics D-Applied Physics: IOP Publishing49:410022-37271361-6463

Av författaren/redakt...: Mohseni, S. M.; Hamdi, M.; Chung, S.; Redjai Sani, Soh ...; Åkerman, Johan, ...

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