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9 papers · 2 filters
High Precision Magnetic Linear Dichroism Measurements in (Ga,Mn)As
N. Tesarova, J. Subrt, P. Maly +4
Investigation of magnetic materials using the first-order magneto-optical Kerr effects (MOKE) is well established and is frequently used in the literature. On the other hand, the u…
Magnetic anisotropy energy of disordered tetragonal Fe-Co systems from ab initio alloy theory
Ilja Turek, Josef Kudrnovsky, Karel Carva
We present results of systematic fully relativistic first-principles calculations of the uniaxial magnetic anisotropy energy (MAE) of a disordered and partially ordered tetragonal…
Epitaxy-distorted spin-orbit Mott insulator in Sr2IrO4 thin films
C. Rayan Serrao, Jian Liu, J. T. Heron +14
High quality epitaxial thin films of Jeff=1/2 Mott insulator Sr2IrO4 with increasing in-plane tensile strain have been grown on top of SrTiO3(001) substrates. Increasing the in-pla…
Magnetic and dielectric properties of multiferroic Eu0.5Ba0.25Sr0.25TiO3 ceramics
Veronica Goian, Stanislav Kamba, Premysl Vanek +3
Dielectric and magnetic properties of Eu0.5Ba0.25Sr0.25TiO3 are investigated between 10 K and 300 K in the frequency range from 10 Hz to 100 THz. A peak in permittivity revealed ne…
Experimental observation of the optical spin-orbit torque
N. Tesarova, P. Nemec, E. Rozkotova +6
Spin polarized carriers electrically injected into a magnet from an external polarizer can exert a spin transfer torque (STT) on the magnetization. The phe- nomenon belongs to the…
Tunnelling anisotropic magnetoresistance of Fe/GaAs/Ag(001) junctions from first principles: Effect of hybridized interface resonances
Rudolf Sykora, Ilja Turek
Results of first-principles calculations of the Fe/GaAs/Ag(001) epitaxial tunnel junctions reveal that hybridization of interface resonances formed at both interfaces can enhance t…
Surface phase transitions in BiFeO3 below room temperature
R. Jarrier, X. Marti, J. Herrero-Albillos +15
We combine a wide variety of experimental techniques to analyze two heretofore mysterious phase transitions in multiferroic bismuth ferrite at low temperature. Raman spectroscopy,…
Experimental observation of the optical spin transfer torque
P. Nemec, E. Rozkotova, N. Tesarova +8
The spin transfer torque is a phenomenon in which angular momentum of a spin polarized electrical current entering a ferromagnet is transferred to the magnetization. The effect has…
Direct measurement of the three dimensional magnetization vector trajectory in GaMnAs by a magneto-optical pump-and-probe method
N. Tesarova, P. Nemec, E. Rozkotova +7
We report on a quantitative experimental determination of the three-dimensional magnetization vector trajectory in GaMnAs by means of the static and time-resolved pump-and-probe ma…