Effect of Gamma Irradiation on the Magnetothermoelectric Properties of Extruded ZrO2-Modified Bi0.85Sb0.15

— Electrical and thermal properties of extruded unmodified and ZrO 2 -modified Bi 0.85 Sb 0.15 samples have been studied as functions of gamma dose at temperatures from ~77 to 300 K in magnetic fields of up to ~74 × 10 4 A/m. The results demonstrate that irradiation of undoped and unmodified samples...

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Bibliographic Details
Published in:Inorganic materials 2022-06, Vol.58 (6), p.561-567
Main Authors: Tagiyev, M. M., Abdullaeva, I. A., Abdinova, G. D.
Format: Article
Language:English
Subjects:
Carrier density
Carrier mobility
Chemistry
Chemistry and Materials Science
Current carriers
Defects
Electrical resistivity
Extrusion
Gamma irradiation
Industrial Chemistry/Chemical Engineering
Inorganic Chemistry
Magnetic properties
Materials Science
Radiation effects
Solid solutions
Thermal conductivity
Thermodynamic properties
Thermoelectric materials
Zirconium dioxide
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Summary:— Electrical and thermal properties of extruded unmodified and ZrO 2 -modified Bi 0.85 Sb 0.15 samples have been studied as functions of gamma dose at temperatures from ~77 to 300 K in magnetic fields of up to ~74 × 10 4 A/m. The results demonstrate that irradiation of undoped and unmodified samples of the Bi 0.85 Sb 0.15 solid solution to low gamma doses (1 Mrad) leads to the formation of radiation-induced donor defects, which scatter current carriers, raising the electrical conductivity (σ) of the material and reducing its thermoelectric power (α) and carrier mobility (μ). Raising the defect density leads to capture of current carriers, reducing their concentration and raising μ. The electron and lattice components of thermal conductivity have been evaluated a functions of gamma dose.
ISSN:0020-1685
1608-3172
DOI:10.1134/S0020168522060140