Electric modulus formalism and electrical transport property of ball mill synthesized nanocrystalline Mn doped ZrO2 solid solution

2015 ◽  
Vol 479 ◽  
pp. 67-73 ◽  
Author(s):  
S. Saha ◽  
A. Nandy ◽  
A.K. Meikap ◽  
S.K. Pradhan
Keyword(s):  
Solid Solution ◽  
Transport Property ◽  
Electrical Transport ◽  
Ball Mill ◽  
Electric Modulus ◽  
Electrical Transport Property ◽  
Modulus Formalism ◽  
Mn Doped ◽  
Electric Modulus Formalism

Electrical Relaxation Studies in Fluorite Oxides

1988 ◽  
Vol 135 ◽  
Author(s):  
Partho Sarkar ◽  
Patrick S. Nicholson
Keyword(s):  
Solid Solutions ◽  
Oxygen Vacancies ◽  
Electric Modulus ◽  
Dopant Concentration ◽  
Low Frequency ◽  
Relaxation Processes ◽  
Modulus Formalism ◽  
Free Oxygen ◽  
Range Migration ◽  
Electric Modulus Formalism

AbstractElectric relaxation in CeO2-M203 (M34 sY3+, La3+) solid solutions has been investigated as a function of temperature (373K-673K) using the electric modulus formalism in the frequency range 5 to 107Hz. Two relaxation processes are observed in dilute solid solutions. The low frequency process is identified as a long range migration of free oxygen-vacancies (Process A) and the high frequency process is due to reorientation relaxation of the (MceVo) charged associates (Process B). The relaxation process is analysed using a non-exponential decay function, ø(t)=exp[-(t/τo)B] for O<β≤1, of the electric field. The observed activation enthalpy minimum as a function of dopant concentration for the Process A is explained using the concept of incomplete dissociation of oxygen-vacancies from (MceVo) defect associates and the formation of higher-order defect clusters at higher mole% M203.

scholarly journals STRUCTURAL AND DIELECTRIC PROPERTIES OF GLASSES IN THE SYSTEM TeO2–CaCu3Ti4O12

2012 ◽  
Vol 02 (04) ◽  
pp. 1250020 ◽  
Author(s):  
P. THOMAS ◽  
K. B. R. VARMA
Keyword(s):  
Dielectric Constant ◽  
Electric Modulus ◽  
Differential Scanning Calorimetric ◽  
Frequency Range ◽  
Low Loss ◽  
Modulus Formalism ◽  
X Ray ◽  
Dielectric Constant And Loss ◽  
Frequency Independent ◽  
Electric Modulus Formalism

The glasses in the system (100 - x) TeO2 –x CaCu3Ti4O12 , (x = 0.25 mol. % to 3 mol.%) were fabricated. The color varied from olive green to brown as the CaCu3Ti4O12 (CCTO) content increased in TeO2 matrix. The X-ray powder diffraction and differential scanning calorimetric analyses that were carried out on the as-quenched samples confirmed their amorphous and glassy nature respectively. The dielectric constant and loss in the 100 Hz–1 MHz frequency range were monitored as a function of temperature (50–400°C). The dielectric constant [Formula: see text] and the loss (D) increased as the CCTO content increased in TeO2 at all the frequencies and temperatures under investigation. Further, the [Formula: see text] and D were found to be frequency-independent in the 50–200°C temperature range. The value obtained for the loss at 1 MHz was 0.0019 which was typical of low loss materials, and exhibited near constant loss (NCL) in the 100 Hz–1 MHz frequency range. The electrical relaxation was rationalized using the electric modulus formalism. These glasses may be of considerable interest as substrates for high frequency circuit elements in conventional semiconductor industries owing to their high thermal stability.

Effect of substrate on the electrical transport property of Ba2FeNbO6double perovskite thin films

2007 ◽  
Vol 40 (5) ◽  
pp. 1430-1434 ◽  
Author(s):  
N Rama ◽  
J B Philipp ◽  
M Opel ◽  
V Sankaranarayanan ◽  
R Gross ◽  
...  
Keyword(s):  
Thin Films ◽  
Transport Property ◽  
Electrical Transport ◽  
Electrical Transport Property

Crystal structure and electrical transport property of KMF3 (M = Mn, Co, and Ni)

2013 ◽  
Vol 28 (S1) ◽  
pp. S3-S6 ◽  
Author(s):  
S.L. Wang ◽  
W.L. Li ◽  
G.F. Wang ◽  
D.Y. Dong ◽  
J.J. Shi ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Transport Property ◽  
Electrical Transport ◽  
Spin Exchange ◽  
Rietveld Method ◽  
Electrical Transport Property ◽  
Temperature Dependent ◽  
Cell Parameters ◽  
Structure Morphology ◽  
Transition Metal Fluorides

The transition metal fluorides KMF3 (M = Mn, Co, and Ni) were synthesized through a simple solution route. The crystal structure, morphology and electrical transport property of the resulting products were investigated. The compound KMF3 crystallizes in a cubic perovskite structure with space group Pm-3m (No. 221). A crystal structure of KMF3 was refined by the Rietveld method based on the X-ray powder diffraction data. The unit-cell parameters are 4.189 46(4), 4.075 58(4), and 4.025 70(2) for KMnF3, KCoF3 and KNiF3, respectively. A metal–insulator transition was observed in temperature-dependent electrical transport characterization in the temperature range from 250 to 280 K for these three compounds, which is considered to be related to spin-exchange in this kind of material.

Control of anisotropic electrical transport property of Bi2S3 thermoelectric polycrystals

2011 ◽  
Vol 21 (25) ◽  
pp. 9194 ◽  
Author(s):  
Zhen-Hua Ge ◽  
Bo-Ping Zhang ◽  
Peng-Peng Shang ◽  
Jing-Feng Li
Keyword(s):  
Transport Property ◽  
Electrical Transport ◽  
Electrical Transport Property
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