Structure and Electric Property of BaTi2O5 Film by Laser Ablation

2007 ◽  
Vol 350 ◽  
pp. 103-106
Author(s):  
Chuan Bin Wang ◽  
Rong Tu ◽  
Takashi Goto
Keyword(s):  
Activation Energy ◽  
Electrical Conductivity ◽  
Laser Ablation ◽  
Curie Temperature ◽  
Electric Property ◽  
High Curie Temperature ◽  
Arrhenius Relationship ◽  
Permittivity Maximum

BaTi2O5 film was prepared on MgO (100) substrate by laser ablation, and the structure and electric property of the film were investigated. The film was b-axis oriented and epitaxially grown on the substrate along two in-plane directions with the a-axes ([100]-orientation) perpendicular to each other. The b-axis oriented BaTi2O5 film exhibited a sharp permittivity maximum (~ 2000) and had a high Curie temperature (750 K). The electrical conductivity increased with temperature and showed the Arrhenius relationship having an activation energy of 1.25 eV.

ELECTRICAL CONDUCTIVITY OF COBALT-SUBSTITUTED BaZn-W HEXAGONAL FERRITES

1993 ◽  
Vol 07 (11) ◽  
pp. 753-760 ◽  
Author(s):  
V. DEVENDER REDDY ◽  
P. VENUGOPAL REDDY
Keyword(s):  
Activation Energy ◽  
Electrical Conductivity ◽  
Curie Temperature ◽  
Physical Properties ◽  
Spin Reorientation ◽  
Cobalt Doping ◽  
Hexagonal Ferrites ◽  
Paramagnetic Region ◽  
First Time ◽  
Curie Temperatures

The D.C. electrical conductivity of cobalt substituted BaZn-W hexagonal ferrites has been studied as a function of composition and temperature over a temperature range of 300–800 K. It has been observed that the cobalt doping has no influence on the RT values of electrical conductivity, although it does affect many other physical properties. For the first time, the authors noticed two clear and distinct transitions in the conductivity vs. temperature plots of all the samples, the first being ≈475 K and the second near their Curie temperatures. The transition T1 has been attributed to the spin reorientation while the second could be due to the Curie temperature. The activation energy values obtained for the paramagnetic region are found to be higher than those of the ferrimagnetic one for all the samples.

Effect of Cu doping on the electrical Properties of ZnTe by Vacuum Thermal Evaporation

2018 ◽  
Vol 31 (3) ◽  
pp. 20
Author(s):  
Sarmad M. M. Ali ◽  
Alia A.A. Shehab ◽  
Samir A. Maki
Keyword(s):  
Activation Energy ◽  
Electrical Conductivity ◽  
Hall Effect ◽  
Carrier Concentration ◽  
Hall Mobility ◽  
Cu Doping ◽  
Before And After ◽  
Hall Effect Measurements ◽  
Evaporation Technique ◽  
P Type

In this study, the ZnTe thin films were deposited on a glass substrate at a thickness of 400nm using vacuum evaporation technique (2×10-5mbar) at RT. Electrical conductivity and Hall effect measurements have been investigated as a function of variation of the doping ratios (3,5,7%) of the Cu element on the thin ZnTe films. The temperature range of (25-200°C) is to record the electrical conductivity values. The results of the films have two types of transport mechanisms of free carriers with two values of activation energy (Ea1, Ea2), expect 3% Cu. The activation energy (Ea1) increased from 29meV to 157meV before and after doping (Cu at 5%) respectively. The results of Hall effect measurements of ZnTe , ZnTe:Cu films show that all films were (p-type), the carrier concentration (1.1×1020 m-3) , Hall mobility (0.464m2/V.s) for pure ZnTe film, increases the carrier concentration (6.3×1021m-3) Hall mobility (2m2/V.s) for doping (Cu at 3%) film, but  decreases by increasing Cu concentration.

NIMAG 105

Alloy Digest ◽  
1976 ◽  
Vol 25 (5) ◽  
Keyword(s):  
Corrosion Resistance ◽  
Curie Temperature ◽  
Physical Properties ◽  
Surface Treatment ◽  
Tensile Properties ◽  
Nickel Alloy ◽  
High Temperatures ◽  
Heat Treating ◽  
High Curie Temperature ◽  
Magnetostriction Coefficient

Abstract NIMAG 105 is a wrought nickel alloy with a high magnetostriction coefficient. It is easily formed or drawn, has a high Curie temperature and has low oxidation at high temperatures. It is recommended for electronic and electrical applications. This datasheet provides information on composition, physical properties, hardness, elasticity, and tensile properties. It also includes information on corrosion resistance as well as forming, heat treating, machining, joining, and surface treatment. Filing Code: Ni-228. Producer or source: Spang Industries Inc..

scholarly journals Enhancing the electrical properties of high-Curie temperature BNT–PZT piezoceramics by oxides-hydrothermal method

AIP Advances ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 075119
Author(s):  
Bo Li ◽  
Fei Zhu ◽  
Deyi Zheng ◽  
Chi pang ◽  
Zihao Fei
Keyword(s):  
Electrical Properties ◽  
Curie Temperature ◽  
Hydrothermal Method ◽  
High Curie Temperature

scholarly journals Effects of alternating current poling on the dielectric and piezoelectric properties of Pb(In0.5Nb0.5)O3–PbTiO3 crystals with a high Curie temperature

RSC Advances ◽  
2021 ◽  
Vol 11 (21) ◽  
pp. 12826-12832
Author(s):  
Junjie Xiong ◽  
Zujian Wang ◽  
Xiaoming Yang ◽  
Rongbing Su ◽  
Xifa Long ◽  
...  
Keyword(s):  
Curie Temperature ◽  
Piezoelectric Properties ◽  
Alternating Current ◽  
High Curie Temperature ◽  
Dielectric And Piezoelectric Properties

The ε33T/ε0 and d33 values of ACP 0.66PIN–0.34PT crystals are shown to be 3070 and 1400 pC N−1, respectively, which are 14% and 18% larger than those of a DCP sample, owing to the enhancement of both intrinsic and extrinsic contributions.

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