Permanent magnetism of dense-packed nanostructures

Magnetism of Nanostructures

Magnetism of close packed Fe 147 clusters

We present ab initio density functional theory calculations of the magnetic structure of perfectly cuboctahedral nanoparticles consisting of 147 iron atoms. The results are compared to geometrically relaxed cuboctahedral and icosahedral Fe147-clusters. It is found, that structural relaxation leads to a compression, which reduces especially the moments of the central atoms of the cluster, while ...

Magnetism in dense hexagonal iron.

The magnetic state of hexagonal close-packed iron has been the subject of debate for more than three decades. Although Mössbauer measurements find no evidence of the hyperfine splitting that can signal the presence of magnetic moments, density functional theory predicts an antiferromagnetic (afm) ground state. This discrepancy between theory and experiment is now particularly important because ...

Control of magnetism by interfacial strain in Ni/V2O3 nanostructures

Magnetic properties of thin films can be modified through proximity effects with multilayer structures. Materials that undergo both a structural phase transition (SPT) and a metal to insulator transition (MIT) have been used for this purpose. This crystallographic change induces a stress to the adjacent layer that changes the magnetic properties of the film through magnetoelastic anisotropy. Th...

Magnetism and electron transport of MnyGa (1 < y < 2) nanostructures

Nanostructured Mn y Ga ribbons with varying Mn concentrations including Mn 1.2 Ga, Mn 1.4 Ga, Mn 1.6 Ga, and Mn 1.9 Ga were prepared using arc-melting and melt-spinning followed by a heat treatment. Our experimental investigation of the nanostructured ribbons shows that the material with y ¼ 1.2, 1.4, and 1.6 prefers the tetragonal L1 0 structure and that with y ¼ 1.9 prefers the D0 22 structur...