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- W2039951113 abstract "Magneto-optical and magnetic properties are presented in sputtered amorphous thin films of U-As, U-As-Cu, and U-As-Ti. Included are magnetization, Hall effect, resistivity, and polar Kerr-rotation measurements. The U-As films show maximum magnetization and Curie-temperature values at xensuremath{simeq}57 at. % U concentration. The largest Kerr rotation of -2.7ifmmode^circelsetextdegreefi{} is measured in ${mathrm{U}}_{61}$${mathrm{As}}_{39}$ at 1.1 eV. The Kerr response in the U-As-Cu films is much smaller reaching -1.05ifmmode^circelsetextdegreefi{} at 1.05 eV in ${mathrm{U}}_{43}$${mathrm{As}}_{28}$${mathrm{Cu}}_{29}$. Maximum Kerr rotation in the U-As-Ti films is -1.45ifmmode^circelsetextdegreefi{} at 1.3 eV in ${mathrm{U}}_{42}$${mathrm{As}}_{49}$${mathrm{Ti}}_{09}$. At U concentrations x55 at. %, the U-As system shows phase separation into two amorphous phases, presumably a metallic UAs and a semiconducting ${mathrm{UAs}}_{2}$ phase. In the U-As-Cu system, for [U]/[As] ratio ensuremath{simeq}0.7, magneto-optical evidence for such a phase separation is presented as well. The U-As-Ti films, however, do not show any indication of phase separation in the composition range investigated. It is concluded that the addition of Cu to U-As does not change the local coordination of the U atoms, while the addition of Ti changes the local coordination of the U atoms to a configuration as in U-As with high [U]/[As] ratios. A formula for the influence of the substrate on the Kerr rotation is derived." @default.
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- W2039951113 date "1992-09-01" @default.
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- W2039951113 title "Magneto-optical and magnetic study of amorphous U-As, U-As-Cu, and U-As-Ti films" @default.
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- W2039951113 doi "https://doi.org/10.1103/physrevb.46.6187" @default.
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