For the realization of data storage devices two fundamental requirements are necessary to guarantee good functionality: a) particles need to be arranged within a sizeable, two-dimensional monolayer of high spatial ordering and b) magnetic states need to maintain stability against thermal pertubations which can be realized by a high anisotropy. We present novel possibilities to enhance the structural ordering of nanoparticles during sample preparation and the anisotropy subsequent. A rotating homogeneous magnetic field allows for the creation of highly ordered two-dimensional particle arrays. Via exposure of these arrays to hydrogen plasma a multistep process is initiated, increasing the magnetic moment and inducing the ordering of the magnetocrystalline easy axes. Our experimental observations are in agreement with simulations of two-dimensional arrays of interacting dipolar particles.
Journal: TechConnect Briefs
Volume: 2, Nanotechnology 2011: Electronics, Devices, Fabrication, MEMS, Fluidics and Computational
Published: June 13, 2011
Pages: 257 - 260
Industry sector: Advanced Materials & Manufacturing
Topicss: Advanced Manufacturing, Nanoelectronics