Exchange-controlled magnetic anisotropy

Exchange-controlled magnetic anisotropy

EXCHANGE INTERACTIONS AND MAGNETIC ANISOTROPY IN THE “Ni4” MAGNETIC MOLECULE

Magnetic properties of a tetrahedral “Ni4” molecule are discussed in terms of the Heisenberg model, with magnetic anisotropy terms included, and on the basis of first-principle calculations within the density functional theory. It is shown that the isotropic Heisenberg model does not provide an adequate description of magnetization at low temperatures; an inclusion of single-site anisotropy ter...

Magnetic Properties of Exchange-Biased Multilayer With Perpendicular Magnetic Anisotropy

Perpendicular exchange-biased and multilayers have been fabricated, changing the thickness of the cobalt that is next to the IrMn layer. The crystal structure, interface roughness and magnetic properties were characterized by X-ray diffraction (XRD), X-ray reflectivity (XRR), atomic force microscopy (AFM) and extraordinary Hall Effect (EHE). The multilayers are flat, and the roughness is about ...

Magnetic oxide nanowires with strain-controlled uniaxial magnetic anisotropy direction

While magnetic nanowires generally have a preferential magnetization direction along the wire axis to minimize magnetostatic energy, it is shown here for epitaxial magnetic oxide nanowires that substrate-induced strain can be used to tailor the magnetic easy axis in any direction. La0.67Sr0.33MnO3 LSMO nanowires were prepared by pulsed laser deposition of LSMO thin films on NdGaO3 NGO substrate...

Magnetic anisotropy in isotropic and nanopatterned strongly exchange-coupled nanolayers

In this study, the fabrication of magnetic multilayers with a controlled value of the in-plane uniaxial magnetic anisotropy field in the range of 12 to 72 kA/m was achieved. This fabrication was accomplished by the deposition of bilayers consisting of an obliquely deposited (54°) 8-nm-thick anisotropic Co layer and a second isotropic Co layer that was deposited at a normal incidence over the fi...