Effects of nonuniform Mn distribution in (Ga,Mn)As
نویسندگان
چکیده
I. Ulfat,1 J. Kanski,2 L. Ilver,2 J. Sadowski,3 K. Karlsson,4,* A. Ernst,5,6 and L. Sandratskii5 1Department of Physics, University of Karachi, Karachi 75270, Pakistan 2Department of Experimental Physics, Chalmers University of Technology, SE-412 96 Göteborg, Sweden 3MAX-IV laboratory, Lund University, SE-221 00 Lund, Sweden 4Department of Life Sciences, University of Skövde, SE-541 28 Skövde, Sweden 5Max-Planck-Institut für Mikrostrukturphysik, Weinberg 2, D-06120 Halle, Germany 6Wilhelm-Ostwald-Institut für Physikalische und Theoretische Chemie, Universität Leipzig, Linnéstraße 2, 04103 Leipzig, Germany (Received 13 November 2013; revised manuscript received 9 January 2014; published 29 January 2014)
منابع مشابه
Mn distribution and spin polarization in Ga(1-x)Mn x As.
Using the density functional full-potential linearized augmented plane wave approach, the x-ray absorption and magnetic circular dichroism (XMCD) spectra of Ga(1-x)Mn x As are calculated. Significantly, XMCD of Mn is highly sensitive to the change in environment, and thus can be utilized to characterize impurity distribution. The nature of Mn-induced spin polarization on Ga and As sites, vital ...
متن کاملExperimental Study on the Magnetomechanical Characteristics of Ni-Mn-Ga Ferromagnetic Shape Memory Alloy Single Crystals
Magnetic shape memory properties of Ni-Mn-Ga single crystals were characterized by measurement of stress-induced martensite reorientation under constant magnetic fields. Also magnetic field-induced strain as a function of the applied magnetic field under different constant compressive stress levels has been investigated. All the experiments were performed at room temperature in which the sample...
متن کاملMn-induced modifications of Ga 3d photoemission from (Ga, Mn)As: evidence for long range effects.
Using synchrotron based photoemission, we have investigated the Mn-induced changes in Ga 3d core level spectra from as-grown Ga(1-x)Mn(x)As. Although Mn is located in Ga substitutional sites, and therefore does not have any Ga nearest neighbors, the impact of Mn on the Ga core level spectra is pronounced even at Mn concentrations in the region of 0.5%. The analysis shows that each Mn atom affec...
متن کاملElectronic and magnetic properties of substitutional Mn clusters in (Ga,Mn)As
The magnetization and hole distribution of Mn clusters in Ga,Mn As are investigated by all-electron total energy calculations using the projector augmented wave method within the density-functional formalism. It is found that the energetically most favorable clusters consist of Mn atoms surrounding one center As atom. As the Mn cluster grows, the hole band at the Fermi level splits increasingly...
متن کاملMagnetic and Structural Properties of Rapidly Quenched Tetragonal Mn Ga Nanostructures
Nanostructured Mn Ga ribbons with and 1.1 were prepared using arc-melting, melt-spinning and annealing. As-spun samples crystallized into hexagonal and cubic Heusler crystal structures based on the concentration of Mn in Mn Ga. Upon vacuum-annealing the samples at 450 C for about 50 hours, both the hexagonal and cubic structures transformed into a tetragonal structure. High-temperature x-ray di...
متن کامل