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Magnetic Properties of Sputtered Permalloy/Molybdenum Multilayers
Romera Rabasa, Miguel and Ranchal Sánchez, Rocío and Ciudad del Río Pérez, David and Maicas Ramos, Marco Cesar and Aroca Hernández-Ros, Claudio
Magnetic Properties of Sputtered Permalloy/Molybdenum Multilayers.
"Journal of Applied Physics", v. 110
In this work, we report the magnetic properties of sputtered Permalloy (Py: Ni80Fe20)/molybdenum (Mo) multilayer thin ﬁlms. We show that it is possible to maintain a low coercivity and a high permeability in thick sputtered Py ﬁlms when reducing the out-of-plane component of the anisotropy by inserting thin ﬁlm spacers of a non-magnetic material like Mo. For these kind of multilayers, we have found coercivities which are close to those for single layer ﬁlms with no out-of-plane anisotropy. The coercivity is also dependent on the number of layers exhibiting a minimum value when each single Py layer has a thickness close to the transition thickness between Neel and Bloch domain walls.
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