Impact ionization in GaAs: A screened exchange density-functional approach

Abstract

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Antiferromagnetic dipolar ordering in[Co2MnGe∕V]Nmultilayers

“…The Ge sp atom has a very small negative moment which is two orders of magnitude smaller than the Co moment. The orbital moments are almost completely quenched and their absolute values are negligible with respect to the spin magnetic moments [24,31].…”

“…In the case of thermal neutron scattering on the nuclear potential, the interaction range is so short compared to the wavelength that it can be considered as δ-function. This potential is called Fermi's pseudo potential: 24) where b denotes the nuclear scattering length, which is a phenomenological parameter. Using Eq.…”

Epitaxial growth of Co2Cr0.6Fe0.4Al Heusler alloy thin films on MgO (0 0 1) substrates by magnetron

“…Cobalt-based full-Heusler alloys have been considered potential candidates for showing HMF properties. Their structural and magnetic properties have been intensively investigated experimentally [4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] and theoretically [19][20][21][22][23] because they have comparatively high Curie temperatures T C . In particular, Co 2 Cr 1−x Fe x Al (CCFA) is expected to have suitable electro-magnetic properties for injecting a spinpolarized current [16,22].…”

Magnetic exchange coupling and Curie temperature of Ni(1+x)MnSb(x=0,0.25,Lu1, Sandratskii2, Bruno3 2005Journal of Magnetism and Magnetic Materials8000View full textAdd to dashboardCite

“…Some of the Heusler compounds were found to have half-metallic ground state [2] which is characterized by a 100% carrier spin-polarization. An interesting combination of physical properties makes Heusler alloys the subject of intensive experimental and theoretical investigations [7,8,9].In the present work we report the theoretical study of the exchange interactions and Curie temperature of Ni (1+x) MnSb system as a function of Ni concentration. In particular, we focus on the effect of local environment of Mn atoms on half-metallicity and exchange in- * ersoy@mpi-halle.de teractions.…”

“…Some of the Heusler compounds were found to have half-metallic ground state [2] which is characterized by a 100% carrier spin-polarization. An interesting combination of physical properties makes Heusler alloys the subject of intensive experimental and theoretical investigations [7,8,9].…”