Time-dependent rotatable magnetic anisotropy in polycrystalline exchange-bias systems: Dependence on grain-size distribution

Magnetic Resonant Reflectometry on Exchange Bias Systems

Perpendicular exchange bias and magnetic anisotropy in CoOÕpermalloy multilayers

S. M. Zhou, L. Sun, P. C. Searson, and C. L. Chien Department of Physics and Astronomy, Johns Hopkins University, Baltimore, Maryland 21218, USA Surface Physics Laboratory (State Key Laboratory) and Department of Physics, Fudan University, Shanghai 200433, China Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, Maryland 21218, USA ~Received 18 August 2003; pu...

Grain size control in polycrystalline colloidal

Recent experiments on the static and dynamic properties of polycrystalline colloidal solids show a pronounced influence of morphological details. Here we investigate several possibilities to vary systematically one key morphological parameter, namely the average crystallite radius rc of polycrystalline solids. We report measurements of rc as observed by microscopy in well-characterized Yukawa m...

Grain-size dependence of intergranular magnetic correlations in nanostructured metals

Magnetic small-angle neutron scattering experiments were performed on nanostructured Fe, Co and Ni samples of varying grain size, produced by inert-gas condensation. The experiments show that the spontaneous spatial magnetic correlations forming in zero-field extend over many individual grains. These correlations depend strongly on grain size. In Fe, they have a minimum at a grain size of aroun...

Exchange-controlled magnetic anisotropy