We studied a solid-solution system of the transition-metal pnictide, Y2(MnxFe1−x)12P7, with Zr2Fe12P7-type structure, which has two kinds transition metal sites: three tetrahedral sites and pyramidal site. successfully obtained polycrystalline samples Y2(MnxFe1−x)12P7 in range 0 ≦ x 0.9. The lattice parameter along a-axis monotonically increases Mn substitution, while that c-axis is nearly cons...

Fullerenes C60 are molecules composed of carbon atoms arranged in a hollow spherical structure. They have been found to bind transition metal complexes, which atom and one or more other atoms. This binding has be very strong, with the fullerene forming protective shell around complex. potential applications range fields, such as biochemistry nanotechnology. review provides description some exam...

A novel mechanism for ramified island growth in the initial stages of metal heteroepitaxy is reported. Scanning tunneling microscopy measurements reveal that copper islands on Ni(100), as they grow in size, undergo a shape transition. Below a critical size of ø480 atoms, compact islands form, while above this size they develop a ramified shape. This effect is not of kinetic origin and has been ...

The influence of negative-energy states (NES) on forbidden magnetic-dipole ns1 2 2 n 1 1 s1 2 transitions in alkali-metal atoms is investigated. We find that the NES contributions are significant in almost all cases and, for rubidium, reduce the transition rate by a factor of 8. We tabulate magnetic-dipole M1 transition amplitudes for the alkalis. Our M1 value for cesium, where accurate measure...

The transition-metal dichalcogenide 1T-TiSe2 is a quasi-two-dimensional layered material with a charge density wave (CDW) transition temperature of T(CDW) ≈ 200 K. Self-doping effects for crystals grown at different temperatures introduce structural defects, modify the temperature-dependent resistivity, and strongly perturbate the CDW phase. Here, we study the structural and doping nature of su...

Electrical conductivities are reported for degenerate fluid nitrogen at pressures up to 180 GPa (1.8 Mbar) and temperatures of approximately 7000 K. These extreme quasi-isentropic conditions were achieved with multiple-shock compression generated with a two-stage light-gas gun. Nitrogen undergoes a nonmetal-metal transition at 120 GPa, probably in the monatomic state. These N data and previous ...

Large magnetocrystalline anisotropy energy (MAE) is a critical requirement for nanomagnets for applications in magnetic memory and storage devices. Due to small spin-orbit interaction the MAE of ferromagnetic films or single molecule magnets based on 3d metals is small and in typical magnetic nanostructures it is of the order of 2-3 meV. We show that MAE as high as 140 meV can be achieved by ap...

Z. Naturforsch. 54 b, 38-44 (1999); received August 28, 1998 Intermetallic Compounds, Crystal Structure, Chemical Bonding SrRhlm, SrPdIn2, Srlrln2, and SrPtIn2 have been synthesized by reaction of mixtures of the elements in glassy carbon crucibles in a high-frequency furnace. The new compounds were investigated by X-ray diffraction on powders as well as single crystals; a = 437.3(2), b = 1091....