Controlling the magnetic reversal mechanism of exchange biased MnxOy/Ni80Fe20 bilayers through O+ implantation
作者： Ji Zhang , Grace L. Causer , Xinzhi Liu , Mihail Ionescu , Sean Li
DOI: 10.1016/J.JMMM.2018.12.076
关键词: Geomagnetic reversal 、 Coercivity 、 Analytical chemistry 、 Exchange bias 、 Reflectometry 、 Bilayer 、 Spin magnetic moment 、 Neutron reflectometry 、 Sputter deposition 、 Materials science
摘要: Abstract This work investigates the different magnetic reversal mechanisms of as-grown and oxygen-ion (O+) implanted MnxOy/Ni80Fe20 bilayers. A bilayer was prepared by ion-beam sputter deposition in an Ar+ atmosphere using a partially oxidised Mn target. Oxygen implantations were then performed 8 keV O+ ions at fluences 1016, 1017 1018 ions/cm2 to modify exchange bias strength interface. The magnetic, crystallographic chemical properties bilayers before after implantation studied transmission electron microscopy, X-ray reflectometry, magnetometry polarised neutron reflectometry. results show overall improved coercivity for 1017 ions/cm2 sample shows greatest improvement further its detailed spin-reversal behaviour Data analysis magnetically-trained state reveals coexistence coherent rotational non-coherent spin solely rotation mechanism bilayer.
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