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10 papers
Comparative study of tight-binding and ab initio electronic structure calculations focused on magnetic anisotropy in ordered CoPt alloy
J. Zemen, J. Mašek, J. Kučera +3
An empirical multiorbital (spd) tight binding (TB) model including magnetism and spin-orbit coupling is applied to calculations of magnetic anisotropy energy (MAE) in CoPt L1_0 str…
Pre-edge XANES structure of Mn in (Ga,Mn)As
N. A. Goncharuk, J. Kucera, L. Smrcka
The X-ray absorption near-edge structure (XANES) at the Mn K-edge in the (Ga,Mn)As magnetic semiconductor was simulated using the full potential linearized augmented plane wave (FL…
Microscopic mechanism of the non-crystalline anisotropic magnetoresistance in (Ga,Mn)As
Karel Výborný, Jan Kucera, Jairo Sinova +3
Starting with a microscopic model based on the Kohn-Luttinger Hamiltonian and kinetic p-d exchange combined with Boltzmann formula for conductivity we identify the scattering from…
K-edge XANES of substitutional and interstitial Mn atoms in (Ga,Mn)As
N. A. Goncharuk, L. Smrcka, J. Kucera +5
This work reports theoretical and experimental study of the X-ray absorption near-edge structure (XANES) at the Mn K-edge in (Ga,Mn)As diluted magnetic semiconductors. The spectra…
Voltage control of magnetocrystalline anisotropy in ferromagnetic - semiconductor/piezoelectric hybrid structures
A. W. Rushforth, E. De Ranieri, J. Zemen +10
We demonstrate dynamic voltage control of the magnetic anisotropy of a (Ga,Mn)As device bonded to a piezoelectric transducer. The application of a uniaxial strain leads to a large…
Illumination-induced changes of the Fermi surface topology in three-dimensional superlattices
N. A. Goncharuk, L. Smrcka, P. Svoboda +4
The magnetoresistance of the MBE-grown GaAs/AlGaAs superlattice with Si-doped barriers has been measured in tilted magnetic fields in the as-grown state, and after brief illuminati…