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Shape and thickness effects on the magnetization reversal of Py/Cu/Co nanostructures |
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| Authors: | V Bonanni D Bisero G Gubbiotti AO Adeyeye N Singh C Spezzani |
| Institution: | a CNISM and Dipartimento di Fisica, Università di Ferrara, Italy b CNR-INFM S3, CNISM and Dipartimento di Fisica, Università di Ferrara, Italy c CIC nanoGUNE Consolider, San Sebastian, Spain d CNISM, Dipartimento di Fisica, Università di Perugia, Italy e Information Storage Materials Laboratory, Department of Electrical and Computer Engineering, National University of Singapore, 4 Engineering Drive 3, Singapore 117576, Singapore f Institute for Chemical Research, Kyoto University, Uji, Kyoto 611-0011, Japan g Sincrotrone Trieste S.C.p.A., Trieste, Italy |
| Abstract: | We present an experimental investigation of the magnetization reversal process in NiFe/Cu(10 nm)/Co circular and elliptical nano-elements with different thickness of the magnetic layers. The results obtained using element sensitive X-ray resonant magnetic scattering (XRMS) were compared with the previous measurements showing that the dipolar interlayer coupling favours the antiparallel alignment of the two magnetization layers at remanance. In the case of circular shape, the increased thickness of the ferromagnetic layers stabilizes the antiparallel alignment of the layers over a wider field range. A similar effect, accompanied by a delay in the onset of the antiparallel alignment, is observed in the case of elliptical nano-elements and applying the external field along the longer axis of the elements, due to the additional shape anisotropy. |
| Keywords: | Magnetic properties of nanostructure Magnetization reversal Magnetic multilayer |
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