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Electrical, dielectric and spectroscopic studies on MnO doped LiI–AgI–B2O3 glasses


Moguš-Milanković, Andrea; Pavić, Luka; Srilatha, K.; Srinivasa Rao, Ch.; Srikumar, T.; Gandhi, Y.; Veeraiah, N.
Electrical, dielectric and spectroscopic studies on MnO doped LiI–AgI–B2O3 glasses // Journal of applied physics, 111 (2012), 013714-1 doi:10.1063/1.3676254 (međunarodna recenzija, članak, znanstveni)


Naslov
Electrical, dielectric and spectroscopic studies on MnO doped LiI–AgI–B2O3 glasses

Autori
Moguš-Milanković, Andrea ; Pavić, Luka ; Srilatha, K. ; Srinivasa Rao, Ch. ; Srikumar, T. ; Gandhi, Y. ; Veeraiah, N.

Izvornik
Journal of applied physics (0021-8979) 111 (2012); 013714-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
LiI-AgI-B2O3 glasses; manganese ions; electrical properties

Sažetak
LiI–AgI–B2O3 glasses doped with different concentrations of MnO (ranging from 0 to 0.8 mol%) were prepared. Electrical and dielectric properties have been studied over a wide frequency range of 10-2 – 106 Hz and in the temperature range from 173 to 523 K. The valance states of manganese ions and their coordination in the glass network have been investigated using optical absorption, luminescence and ESR spectroscopy. The analysis of the spectroscopic results has indicated that the manganese ions exist in both Mn2+ and Mn3+ states and occupy octahedral and tetrahedral positions. With increasing MnO concentration there is a gradual increase in the tetrahedral occupancy of Mn2+ ions at the expense of octahedral occupancy in the glass network. The results of dc conductivity have indicated that when T > D/2, the small polaron hopping model is appropriate and the conduction is adiabatic in the nature. Further, the analysis of experimental data indicates that there is a mixed, ionic and electronic, conduction. It has been observed that the electrical conductivity decreases as the concentration of MnO increases suggesting the electronic conduction controlled by polaron hopping between manganese ions. In the low temperature region, up to 250 K, the ac conductivity is nearly temperature independent and varies linearly with frequency, which can be explained by quantum mechanical tunneling (QMT) model. The dielectric properties have been analyzed in the framework of complex dielectric permittivity and complex electrical modulus formalisms. The evolution of the complex permittivity as a function of frequency and temperature has been investigated.

Izvorni jezik
Engleski

Znanstvena područja
Kemija



POVEZANOST RADA


Projekt / tema
098-0982929-2916 - Utjecaj strukture na električna svojstva (bioaktivnih) stakala i keramike (Andrea Moguš-Milanković, )

Ustanove
Institut "Ruđer Bošković", Zagreb

Profili:

Avatar Url Andrea Moguš-Milanković (autor)

Avatar Url Luka Pavić (autor)

Citiraj ovu publikaciju

Moguš-Milanković, Andrea; Pavić, Luka; Srilatha, K.; Srinivasa Rao, Ch.; Srikumar, T.; Gandhi, Y.; Veeraiah, N.
Electrical, dielectric and spectroscopic studies on MnO doped LiI–AgI–B2O3 glasses // Journal of applied physics, 111 (2012), 013714-1 doi:10.1063/1.3676254 (međunarodna recenzija, članak, znanstveni)
Moguš-Milanković, A., Pavić, L., Srilatha, K., Srinivasa Rao, C., Srikumar, T., Gandhi, Y. & Veeraiah, N. (2012) Electrical, dielectric and spectroscopic studies on MnO doped LiI–AgI–B2O3 glasses. Journal of applied physics, 111, 013714-1 doi:10.1063/1.3676254.
@article{article, year = {2012}, pages = {013714-1-013714-11}, DOI = {10.1063/1.3676254}, keywords = {LiI-AgI-B2O3 glasses, manganese ions, electrical properties}, journal = {Journal of applied physics}, doi = {10.1063/1.3676254}, volume = {111}, issn = {0021-8979}, title = {Electrical, dielectric and spectroscopic studies on MnO doped LiI–AgI–B2O3 glasses}, keyword = {LiI-AgI-B2O3 glasses, manganese ions, electrical properties} }

Časopis indeksira:


  • Current Contents Connect (CCC)
  • Web of Science Core Collection (WoSCC)
    • Science Citation Index Expanded (SCI-EXP)
    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


Uključenost u ostale bibliografske baze podataka:


  • Agricultural and Environmental Biotechnology Abstracts


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