Magnetocrystalline and Surface Anisotropy in CoFe2O4 Nanoparticles

Magnetocrystalline anisotropy in permalloy revisited.

Permalloy with a body-centered-cubic structure has been grown on GaAs(001) by molecular beam epitaxy. Its magnetism, Curie temperature, and magnetic anisotropy are determined experimentally and compared to those of conventional face-centered-cubic Permalloy. Unexpectedly the vanishing magnetic cubic anisotropy in Permalloy is found to be independent of its atomic structure but depends only upon...

Magnetocrystalline anisotropy of FePt: A detailed view

Saleem Ayaz Khan,1 Peter Blaha,2 Hubert Ebert,3 Jan Minár,1,3 and Ondřej Šipr1,4 1New Technologies Research Centre, University of West Bohemia, Univerzitnı́ 2732, 306 14 Pilsen, Czech Republic 2Institute of Materials Chemistry, TU Vienna, Getreidemarkt 9, A-1060 Vienna, Austria 3Universität München, Department Chemie, Butenandtstr. 5-13, D-81377 München, Germany 4Institute of Physics ASCR v. v. ...

Tuning the Thermal Relaxation of Transition-Metal Ferrite Nanoparticles Through Their Intrinsic Magnetocrystalline Anisotropy

Local control of single atom magnetocrystalline anisotropy.

Individual Fe atoms on a Cu(2)N/Cu(100) surface exhibit strong magnetic anisotropy due to the crystal field. We show that we can controllably enhance or reduce this anisotropy by adjusting the relative position of a second nearby Fe atom, with atomic precision, in a low-temperature scanning tunneling microscope. Local inelastic electron tunneling spectroscopy, combined with a qualitative first-...

Magnetocrystalline anisotropy and orbital polarization in ferromagnetic transition metals

The magnetocrystalline anisotropy energies (MAEs) of the ferromagnetic metals bcc Fe, fcc and hcp Co, and fcc Ni have been calculated by using the ab initio tight-binding method. Disentangling the strong correlation among the d orbitals with the Hamiltonian in the local spin-density approximation, we have investigated the orbital polarizations induced by the Hubbard U and Racah B. The experimen...