Dielectric enhancement with low dielectric loss in textured ZnO films inserted with NiFe

2017 ◽  
Vol 5 (6) ◽  
pp. 1394-1401 ◽  
Author(s):  
Po-Wei Chi ◽  
Da-Hua Wei
Keyword(s):  
Magnetic Field ◽  
Dielectric Constant ◽  
External Magnetic Field ◽  
Dielectric Loss ◽  
Room Temperature ◽  
Magnetic Field Dependence ◽  
Zno Films ◽  
Low Dielectric ◽  
Dielectric Enhancement ◽  
Temperature Controlled

A magnetic field dependence can be clearly observed in the dielectric constant of ZnO/NiFe/ZnO heterostructures (typically non-ferroelectric system) at room temperature controlled by a low external magnetic field.

Multiferroic properties of S = 1∕2 chain cuprates LiCuVO4: Comparison with LiCu2O2

2015 ◽  
Vol 29 (17) ◽  
pp. 1550086 ◽  
Author(s):  
A. T. Apostolov ◽  
I. N. Apostolova ◽  
S. G. Bahoosh ◽  
S. Trimper ◽  
M. T. Georgieva ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Phase Transition ◽  
Dielectric Constant ◽  
External Magnetic Field ◽  
Field Dependence ◽  
Magnetic Field Dependence ◽  
Magnetic Phase ◽  
Magnetic Interactions ◽  
Multiferroic Properties ◽  
Transition Formula

We propose a microscopic model in order to study the multiferroic (MF) properties of [Formula: see text] (LCVO) taking into account the competing nearest and next-nearest magnetic interactions, frustration and a linear magnetoelectric (ME) coupling. We obtain for [Formula: see text]. The temperature and magnetic field dependence of the polarization [Formula: see text] and [Formula: see text] is observed. It is shown that the dielectric constant [Formula: see text] has a kink near the magnetic phase transition [Formula: see text] K which disappears with increasing of the external magnetic field. Some differences in the MF behavior between [Formula: see text] (LCO) and LCVO are discussed.

Nano iron oxide-deposited calcium copper titanate/polyimide hybrid films induced by an external magnetic field: toward a high dielectric constant and suppressed loss

2016 ◽  
Vol 4 (35) ◽  
pp. 8179-8188 ◽  
Author(s):  
Qing Guo Chi ◽  
Jiu Feng Dong ◽  
Chang Hai Zhang ◽  
Ching Ping Wong ◽  
Xuan Wang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Dielectric Constant ◽  
External Magnetic Field ◽  
High Dielectric Constant ◽  
Filler Loading ◽  
Hybrid Films ◽  
Low Dielectric ◽  
Calcium Copper Titanate ◽  
High Dielectric Permittivity ◽  
High Dielectric

High dielectric permittivity and low dielectric loss of CCTO–Fe3O4/PI composites were obtained at low filler loading induced by magnetic field.

Dielectric Properties of Low-Temperature Sintered Ba0.6Sr0.4TiO3 Ceramics by Addition of Bi2O3-CuO Mixed Oxides

2009 ◽  
Vol 421-422 ◽  
pp. 61-64 ◽  
Author(s):  
Hai Tao Jiang ◽  
Ji Wei Zhai ◽  
Jing Ji Zhang ◽  
Xi Yao
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
Dielectric Loss ◽  
Room Temperature ◽  
Mixed Oxides ◽  
Sintering Temperature ◽  
Low Dielectric ◽  
High Tunability ◽  
Dc Electric Field ◽  
Bst Ceramics

The effect of 9Bi2O3-CuO mixed oxides as sintering agent on sintering behaviors and dielectric properties of Ba0.6Sr0.4TiO3 (BST) ceramics were investigated. It was found that 9Bi2O3-CuO mixed oxides lowered the sintering temperature about 300°C and that highly denser BST ceramic pellets were obtained by sintering at 975oC with addition of 5.0-10.0wt% mixed oxides. For BST ceramics with 5.0wt% CB content sintered at 975°C, had a moderate dielectric constant (ε=1315), low dielectric loss (0.0067) and high tunability (36%) at dc electric field of 20kV/cm and at room temperature and at 10kHz.

Skin–core structured fluorinated MWCNTs: a nanofiller towards a broadband dielectric material with a high dielectric constant and low dielectric loss

2018 ◽  
Vol 6 (9) ◽  
pp. 2370-2378 ◽  
Author(s):  
Yang Liu ◽  
Cheng Zhang ◽  
Benyuan Huang ◽  
Xu Wang ◽  
Yulong Li ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Dielectric Loss ◽  
High Dielectric Constant ◽  
Dielectric Material ◽  
Epoxy Composite ◽  
Low Dielectric ◽  
High Dielectric

A novel skin–core structured fluorinated MWCNT nanofiller was prepared to fabricate epoxy composite with broadband high dielectric constant and low dielectric loss.

scholarly journals Crown ether-containing polyimides with high dielectric constant

RSC Advances ◽  
2017 ◽  
Vol 7 (38) ◽  
pp. 23309-23312 ◽  
Author(s):  
Ting Yang ◽  
Wenhui Xu ◽  
Xinwen Peng ◽  
Haoqing Hou
Keyword(s):  
Dielectric Constant ◽  
Dielectric Loss ◽  
Crown Ether ◽  
High Dielectric Constant ◽  
Low Dielectric ◽  
High Dielectric

Crown ether-containing polyimides possess high dielectric constant and low dielectric loss, without sacrificing other properties.

scholarly journals Synthesis of cobalt nanowires in aqueous solution under an external magnetic field

2016 ◽  
Vol 7 ◽  
pp. 990-994 ◽  
Author(s):  
Xiaoyu Li ◽  
Lijuan Sun ◽  
Hu Wang ◽  
Kenan Xie ◽  
Qin Long ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Aqueous Solution ◽  
External Magnetic Field ◽  
Room Temperature ◽  
Magnetic Measurements ◽  
Chemical Reduction ◽  
Average Diameter ◽  
Firm Structure ◽  
Cobalt Nanowires ◽  
First Time

In contrast to the majority of related experiments, which are carried out in organic solvents at high temperatures and pressures, cobalt nanowires were synthesized by chemical reduction in aqueous solution with the assistance of polyvinylpyrrolidone (PVP) as surfactant under moderate conditions for the first time, while an external magnetic field of 40 mT was applied. Uniform linear cobalt nanowires with relatively smooth surfaces and firm structure were obtained and possessed an average diameter of about 100 nm with a coating layer of PVP. By comparison, the external magnetic field and PVP were proven to have a crucial influence on the morphology and the size of the synthesized cobalt nanowires. The prepared cobalt nanowires are crystalline and mainly consist of cobalt as well as a small amount of platinum. Magnetic measurements showed that the resultant cobalt nanowires were ferromagnetic at room temperature. The saturation magnetization (M s) and the coercivity (H c) were 112.00 emu/g and 352.87 Oe, respectively.

scholarly journals Europium monoxide as a basis for creating a high-temperature spin injector in the semiconductor spintronics

2020 ◽  
Vol 6 (3) ◽  
pp. 113-123
Author(s):  
Arnold S. Borukhovich
Keyword(s):  
Magnetic Field ◽  
Solid Solution ◽  
Composite Material ◽  
High Temperature ◽  
External Magnetic Field ◽  
Room Temperature ◽  
Spin Electronics ◽  
Wide Range ◽  
Semiconductor Spintronics ◽  
Europium Monoxide

The results of the creation of a high-temperature spin injector based on EuO: Fe composite material are discussed. Their magnetic, electrical, structural and resonance parameters are given in a wide range of temperatures and an external magnetic field. A model calculation of the electronic spectrum of the solid solution Eu–Fe–O, responsible for the manifestation of the outstanding properties of the composite, is performed. The possibility of creating semiconductor spin electronics devices capable of operating at room temperature is shown.

scholarly journals Смена знака магнитоемкости в парамагнитной области в катион-замещенном селениде марганца

2018 ◽  
Vol 60 (4) ◽  
pp. 670
Author(s):  
С.С. Аплеснин ◽  
М.Н. Ситников ◽  
А.М. Живулько
Keyword(s):  
Magnetic Field ◽  
Solid Solution ◽  
Magnetic Susceptibility ◽  
Dielectric Loss ◽  
Dielectric Permittivity ◽  
Room Temperature ◽  
Frequency Range ◽  
Wagner Model ◽  
Paramagnetic Region ◽  
Orbital Electron

AbstractThe capacity and the dielectric loss tangent of a Gd_ x Mn_1– x Se ( x ≤ 0.2) solid solution have been measured in the frequency range 1–300 kHz without a magnetic field and in a magnetic field of 8 kOe in the temperature range 100–450 K, and the magnetic moment of the solid solution has been measured in a field of 8.6 kOe. The magnetocapacity effect and the change in the magnetocapacity sign have been observed in room temperature in the paramagnetic region. A correlation of the changes in the dielectric permittivity and the magnetic susceptibility with temperature has been revealed. The magnetocapacity is described using the model with orbital electron ordering and the Maxwell–Wagner model.

Viscomagnetic Heat Flux Experiments as a Test of Gas Kinetic Theory in the Burnett Regime

1978 ◽  
Vol 33 (7) ◽  
pp. 749-760 ◽  
Author(s):  
G. E. J. Eggermont ◽  
P. W. Hermans ◽  
L. J. F. Hermans ◽  
H. F. P. Knaap ◽  
J. J. M. Beenakker
Keyword(s):  
Magnetic Field ◽  
Boundary Layer ◽  
Heat Flux ◽  
External Magnetic Field ◽  
Room Temperature ◽  
Flow Direction ◽  
Rectangular Channel ◽  
Gas Kinetic Theory ◽  
The Magnetic Field ◽  
Good Agreement

In a rarefied polyatomic gas streaming through a rectangular channel, an external magnetic field produces a heat flux perpendicular to the flow direction. Experiments on this “viscom agnetic heat flux” have been performed for CO, N2, CH4 and HD at room temperature, with different orientations of the magnetic field. Such measurements enable one to separate the boundary layer contribution from the purely bulk contribution by means of the theory recently developed by Vestner. Very good agreement is found between the experimentally determined bulk contribution and the theoretical Burnett value for CO, N2 and CH4 , yet the behavior of HD is found to be anomalous.

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