Effect of the number of interfaces on the magnetic properties of [SnO2/Cu-Zn ferrite] multilayer

Abstract

The [SnO2/Cu-Zn ferrite (CZF)]n (n = 5, 10, 15, and 20) multilayer (ML) were deposited by rf-magnetron sputtering to study their magnetic properties. The magnetization and ferromagnetic resonance (FMR) measurements were undertaken to understand the effect of interfaces on the magnetic properties of these ML. FMR signal line shape changes from asymmetric to symmetric as n increases. The FMR signal peak to peak intensity, FMR linewidth, effective and saturation magnetization and coercivity exhibit oscillations as a function of n. In the parallel configuration the resonance field increases with increase in n, presumably due to the decrease in the active layer to dead layer thickness ratio. The interlayer coupling is strong in the ML with n = 5 leading to the formation of spin waves. The ML interlayer coupling and anisotropy decreases with increasing n. The oscillatory behavior of the magnetic properties can be ascribed to the nonmonotonic variations in the structure and the geometry of the interfaces.

Magnetic Properties of ${[{\rm SnO}_{2}/{\rm Cu}{-}{\rm Zn}\ {\rm ferrite}]}_{\rm n}$ Multilayers

“…Hence an interface between these two materials may give rise to interesting magnetic properties. The effect of FM and NM layer thickness and the number of interfaces on the properties of this system is reported elsewhere [10]- [12]. The present study explores the effect of the number of bilayers on the magnetic properties of ferrite ML.…”

FMR Studies of [SnO2/Cu-Zn Ferrite] Multilayers

“…Oxide materials are more stable and their ML can form magnetic structures which do not exist in bulk form. There are reports on ML of ferrites used along with NiO [5,6], MgO [7] , CoO [8] and SnO2 [9][10][11][12].…”