Magnetic properties
Magnetic properties D 9000Magnetic Properties of Ternary Scandium Rare Earth Silicides and Germanides. -LnScSi and LnScGe (Ln: Gd, Tb, Dy, Ho, Er, Y) compounds are characterized by magnetic measurements. The existence of new ferromagnetic and antiferromagnetic compounds with high magnetic ordering temperatures is established. The title compounds exhibit low 3d-electron concentration and strong exchange interactions between rare earth ions via itinerant 3d-and 4p-electrons. -(NIKITIN*, S. A.; OVTCHENKOVA, I. A.; SKOURSKI, Y. V.; MOROZKIN, A. V.; J. Alloys Compd. 345 (2002) 1-2, 50-53; Fac. Phys., Moscow State Univ., Moscow 119899, Russia; Eng.) -W. Pewestorf 05-012
2001electric properties, superconductors, semiconductors electric properties, superconductors, semiconductors D 8000
-011Metal-Semiconductor-Insulator Transitions in Ln 3 Ni Compounds Induced by Hydrogenation.-The compounds Ln 3 Ni and Ln 3 NiHx (Ln: Gd, Ho, Er, Y) are obtained by arc melting of the constituent metals in an Ar atmosphere at a pressure of 50 kPa followed by annealing at 873 K for 14 d and hydrogenation at 253-243 K. The samples are investigated by electrical resistivity and a.c. magnetic susceptibility measurements. Ln 3 NiHx compounds with a large amount of hydrogen show semiconductor and insulator type conductivity, while the parent compound Ln 3 Ni exhibits metallic conduction. The strongly modified transport processes of the hydrides are discussed on the basis of a hopping model. -(NIKITIN, S. A.; TRISTAN, N. V.; PALEWSKI, T.; SKOURSKI, YU. V.; NENKOV, K.; VERBETSKY, V. N.; SALAMOVA, A. A.; J. Alloys Compd. 314 (2001) 1-2, 22-28; Fac. Phys.,
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