Generally, magnetic anisotropy is affected by many factors, such as demagnetization energy from the sample’s shape or microstructure [7], magneto-crystalline energy from the material’s crystal symmetry [8], magneto-elastic interactions from the stress state

of the sample [9], single-ion anisotropy or pair order from chemical short-range order effect [10], exchange anisotropy from the ferromagnetic-antiferromagnetic coupling [11], etc. For thin films, in-plane uniaxial anisotropy determines microwave magnetic properties. Usually, uniaxial magnetic anisotropy is induced by many methods, for example, controlling the sputtering angle [12, 13], changing the target-substrate distance [14], controlling the stress [9, 15], using nanowire arrays [16], etc. Ordered magnetic nanostructures, composed of arrays of different kinds of magnetic elements arranged in 17-AAG solubility dmso a periodic fashion, have attracted increasing attention in recent years [17, 18]. Shape anisotropy was introduced with spatial dependence on a very small length scale when a periodic nanostructure selleck products is defined in a continuous magnetic thin film. The rapid advance in the fabrication of nanostructures, with PF-6463922 cost controlled submicron size and shape offered by modern lithography techniques like ion or electron beam lithography, has triggered increased research on magnetic nanostructures (dots, stripe, or antidots) with a variety of shapes [19–21].

Anodized aluminum oxide (AAO) template with a high areal density [22, 23] (up to 1,011 pores/cm2) and narrow size distribution over a large area has received much attention because of its simple and inexpensive control of structural parameters and excellent thermal and mechanical stability. Various routes have been proposed to replicate the ordering of AAO where the final replicated nanostructures consist of highly ordered glassy antidots, nanowire,

etc. In these nanostructured materials, large coercivity is induced due to strong shape anisotropy, SB-3CT which have attracted a great deal of interest owing to their potential applications as optoelectronics, data storage materials, surface modifiers with specific wetting behavior, etc. [24]. However, in order to apply magneto-electronic devices in the gigahertz region, a soft magnetic film with low coercivity and in-plane uniaxial anisotropy is developed. Therefore, in the present work, we use an AAO nanostructure with barrier layer as a substrate. CoZr nanohill structured magnetic film (approximately 25 nm) has been sputtered onto a barrier layer of AAO by oblique sputtering. Oblique sputtering would induce in-plane uniaxial anisotropy [25] and increase shape anisotropy. We investigated static and dynamic magnetic properties of CoZr nanostructured films with various oblique sputtering angles and obtained adjustable resonance frequency and linewidth. Methods The annealed aluminum foil (99.95%) was used to prepare the single anodic alumina template (AAO). Two-step oxidation was used to obtain the anodic alumina template.