Dielectric studies of nanocrystalline Manganese Tungstate
Abstract
The dielectric properties of monoclinic manganese tungstate have been studied as a function of frequency and temperature. It was found that the dielectric constant and dielectric loss for all temperatures had high values at low frequencies which decreased rapidly as frequency increased attaining a constant value at higher frequencies. The a.c. conductivity increased as frequency increased, conforming small polaron hopping. As temperature increased, the values of the a.c. conductivity are shifted to higher values. Higher values were also obtained when the particle size decreased. These properties make the nano-sized MnWO4 as a promising material for fabricating humidity sensors.
Supporting agencies: The authors are grateful to KSCSTE, Thiruvananthapuram, Kerala and University Grants Commission (UGC), New Delhi for the financial support.
About the Authors
N. Aloysius Sabu
Nanoscience Research Centre (NSRC), Department of Physics, Nirmala College
India
India
Muvattupuzha - 686 661, Kerala
K. P. Priyanka
Nanoscience Research Centre (NSRC), Department of Physics, Nirmala College
India
India
Muvattupuzha - 686 661, Kerala
Smitha Thankachan
Department of Physics, Maharaja’s College
India
India
Ernakulam - 682 011, Kerala
Anu Tresa Sunny
School of Chemical Sciences, MG University
India
India
Kottayam - 686 560, Kerala
E. M. Mohammed
Department of Physics, Maharaja’s College
India
India
Ernakulam - 682 011, Kerala
O. P. Jaseentha
Nanoscience Research Centre (NSRC), Department of Physics, Nirmala College
Russian Federation
Russian Federation
Muvattupuzha - 686 661, Kerala
Thomas Varghese
Nanoscience Research Centre (NSRC), Department of Physics, Nirmala College
India
India
Muvattupuzha - 686 661, Kerala
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Review
For citations:
Aloysius Sabu N., Priyanka K.P., Thankachan S., Sunny A.T., Mohammed E.M., Jaseentha O.P., Varghese T. Dielectric studies of nanocrystalline Manganese Tungstate. Nanosystems: Physics, Chemistry, Mathematics. 2013;4(3):357-362.
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