TY - JOUR
T1 - Crystal structure, magnetic susceptibility and electrical conductivity of pure and NiO-doped MoO2 and WO2
AU - Ben-Dor, L.
AU - Shimony, Y.
PY - 1974/6
Y1 - 1974/6
N2 - Single crystals of MoO2 and WO2, pure and doped with NiO, were grown by chemical transport in Vycor ampoules using iodine as the transporting agent. From X-ray diffraction analyses it was found that all the crystals were monoclinic, and that doping up to 5% does not change the unit cell constants. The pure dioxide crystals are weakly paramagnetic χM < 100×10-6 emu, but doping raises the magnetic susceptibility markedly: ∼ 2500×10-6 emu. Resistance studies show that these materials are metallic conductors, the room temperature specific resistivity being of the order of 10-4 - 10-3 Ωcm, decreasing by one order of magnitude at liquid nitrogen temperature. Doping also substantially lowers the conductivity.
AB - Single crystals of MoO2 and WO2, pure and doped with NiO, were grown by chemical transport in Vycor ampoules using iodine as the transporting agent. From X-ray diffraction analyses it was found that all the crystals were monoclinic, and that doping up to 5% does not change the unit cell constants. The pure dioxide crystals are weakly paramagnetic χM < 100×10-6 emu, but doping raises the magnetic susceptibility markedly: ∼ 2500×10-6 emu. Resistance studies show that these materials are metallic conductors, the room temperature specific resistivity being of the order of 10-4 - 10-3 Ωcm, decreasing by one order of magnitude at liquid nitrogen temperature. Doping also substantially lowers the conductivity.
UR - http://www.scopus.com/inward/record.url?scp=0016072497&partnerID=8YFLogxK
U2 - 10.1016/0025-5408(74)90120-2
DO - 10.1016/0025-5408(74)90120-2
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AN - SCOPUS:0016072497
SN - 0025-5408
VL - 9
SP - 837
EP - 844
JO - Materials Research Bulletin
JF - Materials Research Bulletin
IS - 6
ER -