Magnetocrystalline anisotropy of FePt: A detailed view

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. ...

Tailoring magnetocrystalline anisotropy of FePt by external strain

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...

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-...

Torque method for the theoretical determination of magnetocrystalline anisotropy.

We propose a torque method for the theoretical determination of the magnetocrystalline anisotropy ~MCA! energy for systems with uniaxial symmetry. While the dependence of the total energy on the angle between the magnetization and the normal axis (u) can be expressed as E(u)5E01K2sin (u)1K4sin (u), we show that the MCA energy @defined as EMCA5E(u590°)2E(u50°)5K21K4# can be easily evaluated thro...