Temperature dependent biquadratic exchange coupling in Co/Cu (0.94)Mn(0.06) multilayers

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dc.contributor.authorSaerbeck, Ten_AU
dc.contributor.authorLoh, NAen_AU
dc.contributor.authorAli, Men_AU
dc.contributor.authorHickey, BJen_AU
dc.contributor.authorLott, Den_AU
dc.contributor.authorToperverg, BPen_AU
dc.contributor.authorMulders, AMen_AU
dc.contributor.authorStampfl, APJen_AU
dc.contributor.authorKlose, Fen_AU
dc.contributor.authorStamps, RLen_AU
dc.date.accessioned2021-10-08T00:46:24Zen_AU
dc.date.available2021-10-08T00:46:24Zen_AU
dc.date.issued2010-02-05en_AU
dc.date.statistics2021-09-06en_AU
dc.description.abstractMagnetic interlayer coupling phenomena in systems consisting of ferromagnetic films separated by non-magnetic spacer layers, such as Co/Cu multilayers, are heavily dependent on the thickness and composition of the spacer layer. Usual Co/Cu multilayers exhibit the normal oscillatory RKKY exchange coupling resulting in alternating ferromagnetic/antiferromagnetic magnetic alignment of adjacent layers with increasing Cu thickness. We report on a crucial temperature dependence of this coupling introduced as the non-magnetic spacer layer is substituted by a spin-glass material, such as CuMn. Kobayashi et al. first discovered the extraordinary behaviour of a ferromagnetic exchange coupled Co/CuMn multilayer structure showing an increasing antiferromagnetic component as the system is cooled below a critical temperature. In order to investigate the magnetic rearrangement throughout the transition temperature in more detail we used polarized neutron reflectometry in specular and off-specular geometry to resolve the orientation of the magnetization in the Co layers. Co/Cu(0.94)Mn(0.06) multilayer samples with a manganese concentration of 6at% in the spacer layer are grown using sputter deposition and quality checked with X-ray reflectivity and diffraction. The onset of a magnetic rearrangement into an antiferromagnetic constitution around 100K is confirmed by neutron reflectivity measurements, revealing the onset of biquadratic interlayer coupling. Simulations of the full two dimensional off-specular scattering points out each layer breaking into magnetic domains. Further magnetic characterisation of the sample using X-Ray magnetic circular dichroism and conventional magnetometry indicate the role of the Mn doping in the magnetic transition into a biquadratic coupling.en_AU
dc.identifier.citationSaerbeck, T., Loh, N., Ali, M., Hickey, B. J., Lott, D., Toperverg, B. J., Mulders, A., Stampfl, A. P. J., Klose, F., & Stamps, R. L. (2010). Temperature dependent biquadratic exchange coupling in Co/Cu (0.94)Mn(0.06) multilayers. Poster presented to the 34th Annual Condensed Matter and Materials Meeting 2010, Waiheke Island Resort, Waiheke, Auckland, New Zealand 2 - 5 February 2010. Retrieved from: https://physics.org.au/wp-content/uploads/cmm/2010/en_AU
dc.identifier.conferenceenddate5 February 2010en_AU
dc.identifier.conferencename4th Annual Condensed Matter and Materials Meeting 2010en_AU
dc.identifier.conferenceplaceAuckland, New Zealanden_AU
dc.identifier.conferencestartdate2 February 2010en_AU
dc.identifier.issn978-0-646-53897-6en_AU
dc.identifier.urihttps://physics.org.au/wp-content/uploads/cmm/2010/en_AU
dc.identifier.urihttps://apo.ansto.gov.au/dspace/handle/10238/11894en_AU
dc.language.isoenen_AU
dc.publisherAustralian Institute of Physicsen_AU
dc.subjectTemperature dependenceen_AU
dc.subjectCouplingen_AU
dc.subjectCobalten_AU
dc.subjectCopperen_AU
dc.subjectManganeseen_AU
dc.subjectLayersen_AU
dc.subjectFerromagnetismen_AU
dc.subjectAntiferromagnetismen_AU
dc.subjectMagnetic circular dichroismen_AU
dc.subjectNeutron reflectorsen_AU
dc.titleTemperature dependent biquadratic exchange coupling in Co/Cu (0.94)Mn(0.06) multilayersen_AU
dc.typeConference Posteren_AU
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