D.c. conductivity of V2O5–MnO–TeO2 glasses

Sega, K.; Kuroda, Y; Sakata, H.

doi:10.1023/a:1004302431797

Cited by 91 publications

(50 citation statements)

References 24 publications

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“…If the estimated temperature from the slope of such plot is near to experimental temperature, it is supposed to be of adiabatic type. Otherwise, the hopping would be of non-adiabatic type [33], [35]. Fig.…”

Section: Resultsmentioning

confidence: 99%

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Investigation of DC Conductivity and Non-Adiabatic Small Polaron Hopping in V2o5-Seo2-Zno Glass Nanocomposites

Das¹

2017

IJRASET

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Section: Resultsmentioning

confidence: 99%

“…The hopping carrier mobility (μ) of all the glassy samples is very small, signifying localization of electrons or polarons around V-ions [16], [35]. As the conduction of localization for conductive electrons is generally μ < 10 -2 cm 2 V -1 s -1 [4], the conduction owing to hopping mechanism in all the glassy samples is established.…”

mentioning

confidence: 99%

Investigation of DC Conductivity and Non-Adiabatic Small Polaron Hopping in V2o5-Seo2-Zno Glass Nanocomposites

Das¹

2017

IJRASET

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“…In contrast, S of annealed LBMO/NiO has higher negative values all over the temperature range as in Fig 8(b). The increase in [18], where α is the polaron kinetic energy-related constant [34]. The E s values in Table 4 fluctuate with annealing temperatures and have no constant trend for LBMO and LBMO/NiO.…”

Section: Thermoelectric Propertiesmentioning

confidence: 99%

The annealing influence onto the electrical and magnetic behavior of magnetoresistive/insulator system

Ahmed

Mohamed

et al. 2016

Low Temperature Physics

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This investigation is mainly concerned with the effect of annealing temperature (600, 700, 800 and 900 °C) in air for (La 0.7 Ba 0.3 MnO 3 ) 1-x /(NiO) x with x = 0 and x = 0.10 samples. It was shown that the annealing temperature does not affect the structure and parameters of rhombohedral lattice of the samples. However, it is observed that the annealing treatment has a notable effect on the electrical resistivity and the metal-semiconductor transition temperature T ms . Temperature dependent magnetization measurements showed a decrease in Curie temperature T C with annealing temperature. In the same time, annealing process decreases the magnetoresistance of La 0.7 Ba 0.3 MnO 3 , in contrast to (La 0.7 The magnetoresistive material was mixed with an insulator material to enhance the extrinsic CMR that depending on grain boundaries [6] and spin tunneling [7], that CMR may increase under low magnetic fields known as low field magnetoresistance (LFMR). The importance of LFMR refers to use low magnetic field to get high values of MR what is making it useful for applications. This LFMR can be affected by other several factors; one of them is annealing temperature that can affect the grain size and hence the physical properties including LFMR. An annealing effect has a little attention in this direction, especially in LBMO/insulator. Therefore in this work the effects of annealing temperature on the electrical, magnetic, magnetoresistance and thermoelectric properties of La 0.7 Ba 0.3 MnO 3 (LBMO) and (La 0.7 Ba 0.3 MnO 3 ) 0.9 /(NiO) 0.1 (LBMO/NiO) are examined. Experimental(La 0.7 Ba 0.3 MnO 3 ) 1-x /(NiO) x ceramic samples were prepared by the conventional solid state reaction method (x = = 0.0 & 0.10). La 2 O 3 , BaCO 3 and MnCO 3 raw materials were mixed in stoichiometric proportions, ground, pelletized and calcined at 900 °C for 24 h. It was reground again and pelletized and then sintered at 1100 °C for 24 h. NiO insulator was added in stoichiometric portions to the sintered La 0.7 Ba 0.3 MnO 3 compound and lightly ground, then pressed and put in 1000 °C for 24 h. The composites of LBMO and LBMO/NiO annealed for 2 h at 600, 700, 800 and 900 °C. Electrical resistivity was measured by van der Pauw technique in the presence and absence of 0.6 T magnetic field. Samples were examined by x ray, using Brucker (Axs-D& Advance) powder diffractometer at room temperature with Cu (K α ) radiation (λ = 1.5406 Å). The microstructure was investigated by Jeol JSM-6610LV

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“…where e is the electronic charge; k B is the Boltzmann constant, E S is the activation energy required to activate the hopping of the carriers and α is a constant related to the kinetic energy of the polarons 67 . The value of α < 1 suggests the conduction due to small polarons www.intechopen.com…”

Section: Thermoelectric Powermentioning

confidence: 99%

Structural, Morphological, Magneto-Transport and Thermal Properties of Antimony Substituted (La,Pr)2/3Ba1/3Mn1-xSbxO3 Perovskite Manganites

Panwar¹,

Coondoo²,

Sen³

et al. 2011

Advances in Ceramics - Electric and Magnetic Ceramics, Bioceramics, Ceramics and Environment

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D.c. conductivity of V2O5–MnO–TeO2 glasses

Cited by 91 publications

References 24 publications

Investigation of DC Conductivity and Non-Adiabatic Small Polaron Hopping in V2o5-Seo2-Zno Glass Nanocomposites

Investigation of DC Conductivity and Non-Adiabatic Small Polaron Hopping in V2o5-Seo2-Zno Glass Nanocomposites

The annealing influence onto the electrical and magnetic behavior of magnetoresistive/insulator system

Structural, Morphological, Magneto-Transport and Thermal Properties of Antimony Substituted (La,Pr)2/3Ba1/3Mn1-xSbxO3 Perovskite Manganites

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