The normal state resistivity of single phase polycrystalline Gd(Ba<Subscript>2–x </Subscript>Pr<Subscript> x </Subscript>)Cu<Subscript>3</Subscript>O<Subscript>7+δ</Subscript> samples with 0.0≤x≤0.50 have been investigated. There is a distinct metal-insulator transition at <InlineEquation ID="IEq1"> <EquationSource Format="MATHTYPE">% MathType!MTEF!2!1!+- % feaafaart1ev1aaatCvAUfeBSjuyZL2yd9gzLbvyNv2CaerbuLwBLn %...</equationsource></inlineequation></subscript></subscript></subscript></subscript>

Ab initio total energy calculations have been performed for superconducting GdBa<Subscript>2</Subscript>Cu<Subscript>3</Subscript>O<Subscript>7</Subsc ript> and insulating PrBa<Subscript>2</Subscript>Cu<Subscript>3</Subscript>O<Subscript>7</Subsc ript> using the full-potential linear augmented plane-wave method in the local density approximation (LDA) and generalized gradient approximation (GGA). The comparison of the calculated...<//subsc></subscript></subscript></subscript><//subsc></subscript></subscript></subscript>

We have studied the structural, electrical, and magnetic properties of the normal and superconducting states Gd(Ba2-xLax)Cu3O7+δ [Gd(BaLa)123] samples with 0.0 ≤x ≤0.8 prepared by the standard solid-state reaction. XRD characterization shows an orthorhombic-tetragonal structural transition...

Tetragonal Gd<Subscript>1-x</Subscript>Pr<Subscript>x</Subscript>BaCaCu<Subscript>3</ Subscript>O<Subscript>7-δ</Subscript> (0≤x≤1) polycrystalline samples have been prepared by the standard solid-state reaction, and characterized by XRD and SEM. Rietveld analysis on X-ray diffraction pattern shows site mixing between rare earth (R) and Ca. Contrary to Gd<Subscript>1-x</Subscript>Pr<Subscript>x</Subscript>Ba<Subscript>2</Subs cript>Cu<Subscript>3</Subscript>O<Subscript>7-δ</Subscript>, a hump...</subscript></subscript><//subs></subscript></subscript></subscript></subscript><//></subscript></subscript></subscript>

We have performed a first-principle calculation of the structural, electronic and high pressure properties of RuSr<Subscript>2</Subscript>GdCu<Subscript>2</Subscript>O<Subscript>8</Sub script>, a ferromagnetic superconductor, by employing a full-potential linearized augmented plane-wave method within the density-functional theory. The effect of pressure was...<//sub></subscript></subscript></subscript>

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Die Anforderungen an Sekretärinnen und Assistentinnen sind in den letzten Jahren kontinuierlich gestiegen. Das betrifft zum einen den Umgang mit den neuen Medien, zum anderen die vielfach neu hinzugekommenen verantwortungsvollen Aufgaben der Sekretärin oder Assistentin in den Unternehmen, z....