A theory of ferromagnetism in planar heterostructures of (Mn,III)-V semiconductors

A density functional theory of ferromagnetism in heterostructures of compound semiconductors doped with magnetic impurities is presented. The variable functions in the density functional theory are the charge and spin densities of the itinerant carriers and the charge and localized spins of the impurities. The theory is applied to study the Curie temperature of planar heterostructures of III-V semiconductors doped with manganese atoms. The mean-field, virtual-crystal and effective-mass approximations are adopted to calculate the electronic structure, including the spin-orbit interaction, and the magnetic susceptibilities, leading to the Curie temperature. By means of these results, we attempt to understand the observed dependence of the Curie temperature of planar $\delta$-doped ferromagnetic structures on variation of their properties. We predict a large increase of the Curie Temperature by additional confinement of the holes in a $\delta$-doped layer of Mn by a quantum well.Comment: 8 pages, 7 figure

Laser spectroscopy of rare earth compounds

SIGLEAvailable from British Library Document Supply Centre- DSC:D87201 / BLDSC - British Library Document Supply CentreGBUnited Kingdo

Laser spectroscopy of rare earth compounds

SIGLEAvailable from British Library Document Supply Centre- DSC:D87201 / BLDSC - British Library Document Supply CentreGBUnited Kingdo

MAGNETIC AND THERMAL-PROPERTIES OF HOF3-ORDERING IN A SINGLET GROUND-STATE

Holmium trifluoride, HoF3 has C1h symmetry at Ho3+ sites, resulting in a singlet electronic ground state and low-lying excited states. Magnetic, thermal and spectroscopic experiments show that HoF3 orders antiferromagnetically at TN = 0.53 K, which can be interpreted in terms of molecular field theory applied to a non-Kramers doublet S' = 1/2

Nuclear quadruple holeburning in preparation-dependent EuVO4

This paper reports on the study of EuVO4 samples grown from different fluxes. It is the first application of optical holeburning to investigate preparation-dependency between defect lines in samples of nominally the same compound. Analysis suggests that very few of the defect lines are common to the different growths

NUCLEAR QUADRUPOLE HOLEBURNING IN PREPARATION-DEPENDENT EuVO4

This paper reports on the study of EuVO4 samples grown from different fluxes. It is the first application of optical holeburning to investigate preparation-dependency between defect lines in samples of nominally the same compound. Analysis suggests that very few of the defect lines are common to the different growths

MAGNETIC AND THERMAL PROPERTIES OF HoF3-ORDERING IN A SINGLET GROUND STATE

Holmium trifluoride, HoF3 has C1h symmetry at Ho3+ sites, resulting in a singlet electronic ground state and low-lying excited states. Magnetic, thermal and spectroscopic experiments show that HoF3 orders antiferromagnetically at TN = 0.53 K, which can be interpreted in terms of molecular field theory applied to a non-Kramers doublet S' = 1/2