Nanotech 2011 Vol. 2
Nanotech 2011 Vol. 2
Nanotechnology 2011: Electronics, Devices, Fabrication, MEMS, Fluidics and Computational

NanoFab: Manufacturing & Instrumentation Chapter 4

A new route to control the enhancement of structural and anisotropy ordering in two-dimensional particle arrays

Authors: A. Regtmeier, F. Wittbracht, I. Dück, T. Rempel, A. Weddemann, A. Hütten

Affilation: Bielefeld University, Germany

Pages: 257 - 260

Keywords: anisotropy, ordering, enhancement, nanoparticles

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.

ISBN: 978-1-4398-7139-3
Pages: 854
Hardcopy: $199.95