ELECTRON PARAMAGNETIC RESONANCE IN SEMICONDUCTING OXIDE GLASSES OF SYSTEM V2O5-BAO-MN2O3
Abstract
The interactions between V and Mn ions in semiconducting glasses of the system BaO-V2O5 are investigated by EPR. The influence of these interactions on the electrical properties of barium-vanadate glasses after an addition of Mn2O3 is studied. The electrical conductivity of barium-vanadate glasses decreases with increasing content of Mn2O3. It is proposed that this decrease is associated with the formation of pairs Mn2+-V4+, related exchange interaction as well as with the formation of large clusters of the ions V and Mn3+, Mn4+. This phenomenon can lead to a change of V-V distances. The pairs and large clusters make a direct contribution to the activation energy of hopping small polarons.
Keywords
полупроводниковые бариево-ванадатные стекла,
электронный парамагнитный резонанс,
электропроводность,
обменные взаимодействия,
малые поляроны,
сверхтонкая структура,
semiconducting barium-vanadate glasses,
electron paramagnetic resonance,
electrical conductivity,
exchange interaction,
small polarons,
hyperfine structure
About the Authors
V. . Zhachkin
Moscow State Regional University
Russian Federation
Russian Federation
L. . Bogomolova
Skobel’tsyn Research Institute of Nuclear Physics, Moscow State University
Russian Federation
Russian Federation
V. . Tarasova
Physical Department of Moscow State University (MSU)
Russian Federation
Russian Federation
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