Fe/FeO/Fe/FeV Multilayers Characterized by Magnetometry and Polarized Neutron Reflectometry

Authors

Sara J. Callori, California State University, Australian Nuclear Science and Technology Organisation
Kai-Han Chao, National Chung Hsing University, Taichung
Grace Causer, Australian Nuclear Science and Technology Organisation, University of WollongongFollow
Bela Nagy, Wigner Research Center for Physics
Laszlo Kiss, Wigner Research Center for Physics
Attila Sulyok, Centre for Energy Research
Laszlo Bottyan, Wigner Research Center for Physics
Ko-Wei Lin, National Chung Hsing University, TaichungFollow
Frank Klose, Australian Nuclear Science and Technology Organisation, City University of Hong KongFollow

RIS ID

127932

Publication Details

Callori, S. J., Chao, K., Causer, G. L., Nagy, B., Kiss, L. F., Sulyok, A., Bottyan, L., Lin, K. & Klose, F. (2017). Fe/FeO/Fe/FeV Multilayers Characterized by Magnetometry and Polarized Neutron Reflectometry. Ieee Magnetics Letters, 8 4102205-1-4102205-5.

Abstract

We use argon ion-bombardment during Fe layer deposition as a way to tailor the structural and magnetic properties of bilayer and multilayer systems containing Fe/FeV components. We present structural and magnetic results on Fe/FeV bilayer and Fe/Fe-oxide/Fe/FeV multilayer systems. Magnetization measurements were taken over a range of temperatures and show the expected ferromagnetic behavior for the Fe/FeV bilayer. The Fe/Fe-oxide/Fe/FeV multilayer demonstrates an enhanced coercivity and exchange bias at low temperatures, both due to the presence of the antiferromagnetic Fe-oxide layer. Polarized neutron reflectometry results (scattering length density depth profile and neutron spin asymmetry) were used to identify mixed interfacial layers resulting from ion-bombardment. These demonstrated a lower magnetic moment than bulk Fe layers and may undergo a reversal process that differs from non-mixed layers within the sample.