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Defect chemistry and electrical characteristics of undoped and Mn-doped ZnO
Abstract Undoped and Mn-doped ZnO samples were sintered at 1373, 1473, and 1573 K, for 2 h, in air, and then quenched to room temperature. Defect concentrations in these samples at the sinteringExpand
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Interweaving domain configurations in [001]-poled rhombohedral phase 0.68Pb(Mg1/3Nb2/3)O3–0.32PbTiO3 single crystals
Domain structures in [001]-poled rhombohedral phase 0.68Pb(Mg1/3Nb2/3)O3–0.32PbTiO3 single crystals have been investigated using polarized light microcopy. It was found that the observed domainExpand
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Grain growth in Mn-doped ZnO
Abstract Grain growth in ZnO doped with 0.1 to 1.2 mol% Mn was investigated during isothermal sintering from 1100 to 1300°C in air. Mn doping promotes the grain growth of ZnO during sintering, andExpand
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Deep donors in polycrystalline Mn-doped ZnO
In a previous work, significant varistor behaviour was found in polycrystalline ZnO with Mn as the only additive. In the present work, the admittance spectra of these Mn-doped ZnO samples wereExpand
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Varistor behaviour of Mn-doped ZnO ceramics
Abstract Polycrystalline ZnO doped with MnO, from 0.1 to 0.6 mol%, was prepared by conventional ceramic processing. The effect of Mn doping on the electrical properties of ZnO was investigated.Expand
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Hopping conduction in Mn-doped ZnO
The dc and ac conductivities of Mn-doped ZnO were investigated at temperatures from 10 to 100 K. The temperature dependence of the dc conductivity from 10 to 100 K shows an abrupt change at ∼18 K,Expand
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Effect of Al and Mn doping on the electrical conductivity of ZnO
Abstract Samples of Al-doped and Mn-doped ZnO with a doping level up to 1.2 mol% were sintered at temperatures from 1100 to 1400°C in air. dc Electrical conductivities of these samples at roomExpand
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Electric field effects on the phase transitions in [001]-oriented ( 1 − x ) Pb ( Mg 1 / 3 Nb 2 / 3 ) O 3 − x PbTiO 3 single crystals with compositions near the morphotropic phase boundary
Dielectric behavior and phase transitions of [001] oriented (1-x)Pb(Mg 1 / 3 Nb 2 / 3 )O 3 -xPbTiO 3 single crystals with x=29, 31, 32, and 33% were investigated by impedance measurements and highExpand
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Synthesis and dielectric properties of tungsten-based complex perovskites
Ba 2 MeWO 6 (Me = Mg, Ni, Zn) double perovskites were prepared by the conventional solid-state reaction in a wide temperature range. Single-phase ceramics were obtained only at low temperaturesExpand
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