scholarly journals Magnetoelectric, magnetodielectric and magneto-impedance couplings in Bi1−xNdxFe0.99Co0.01O3 compounds

2021 ◽  
Vol 10 (14) ◽  
pp. e470101422189
Author(s):  
Anuar José Mincache ◽  
Odair Gonçalves de Oliveira ◽  
Lilian Felipe da Silva Tupan ◽  
Daniel Matos Silva ◽  
Ivair Aparecido dos Santos ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Electrical Impedance ◽  
Structural Refinement ◽  
Relative Variation ◽  
Dc Magnetic Field ◽  
Magnetoelectric Coefficient ◽  
Impedance Characterization ◽  
The Magnetic Field ◽  
Rhombohedral Symmetry

In this work Bi1−xNdxFe0.99Co0.01O3 ceramics compositions were synthesized for x = 0.05, 0.20 and, y = 0.01. Structural refinement results show that most of the samples crystallized in a rhombohedral symmetry with R3c. Measurements magnetoelectric coefficient, show that the magnetoelectric coefficients are of second order. The electrical impedance characterization of in function external magnetic fields, has a relative variation of the real dielectric response, the loss tangent and the electrical impedance. The systems, as the DC magnetic field strength increased a gain in both the values of the dielectric constant variation, as well as the variation of the electrical impedance. In other words, the greater the intensity of the magnetic field, the greater your response. There were also significant variations with of the magnetic field AC.  

scholarly journals Magnetic properties of cobalt microwires measured by piezoresistive cantilever magnetometry

2014 ◽  
Vol 1 (1) ◽  
Author(s):  
G. Tosolini ◽  
J. M. Michalik ◽  
R. Córdoba ◽  
J. M. de Teresa ◽  
F. Pérez-Murano ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Room Temperature ◽  
Signal To Noise Ratio ◽  
Static Deflection ◽  
Magnetic Structures ◽  
Dual Beam ◽  
Piezoresistive Cantilevers ◽  
Good Signal ◽  
The Magnetic Field

AbstractWe present the magnetic characterization of cobalt wires grown by focused electron beam-induced deposition (FEBID) and studied using static piezoresistive cantilever magnetometry. We have used previously developed high force sensitive submicron-thick silicon piezoresistive cantilevers. High quality polycrystalline cobalt microwires have been grown by FEBID onto the free end of the cantilevers using dual beam equipment. In the presence of an external magnetic field, the magnetic cobalt wires become magnetized, which leads to the magnetic field dependent static deflection of the cantilevers. We show that the piezoresistive signal from the cantilevers, corresponding to a maximum force of about 1 nN, can be measured as a function of the applied magnetic field with a good signal to noise ratio at room temperature. The results highlight the flexibility of the FEBID technique for the growth of magnetic structures on specific substrates, in this case piezoresistive cantilevers.

scholarly journals Microwave Characterization of Metal-Decorated Carbon Nanopowders Using a Single Transmission Line

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Francisco Mederos-Henry ◽  
Sophie Hermans ◽  
Isabelle Huynen
Keyword(s):  
Magnetic Field ◽  
Dielectric Constant ◽  
Transmission Line ◽  
Dc Magnetic Field ◽  
Microwave Characterization ◽  
Novel Approach ◽  
Measurement Results ◽  
Complex Magnetic Permeability

This paper presents a novel approach for the characterization of microwave properties of carbon-based nanopowders, decorated or not with magnetic nanoparticles. Their microwave parameters, dielectric constant, electrical conductivity, and complex magnetic permeability are extracted from measurements performed using a single transmission line acting as a test cell. Two geometries of transmission line were tested, and successful results were obtained with each one of them. The measurement results are assessed by a phenomenological model enabling to fit the measurement of the dielectric constant and conductivity, providing an insight on the compacity quality of the powder sample. Also, the extraction of the permeability is validated by the detection of a ferromagnetic resonance showing a linear dependence on external DC magnetic field.

A Review of Electrical Impedance Characterization of Cells for Label-Free and Real-Time Assays

2019 ◽  
Vol 13 (4) ◽  
pp. 295-305 ◽  
Author(s):  
Hien T. Ngoc Le ◽  
Junsub Kim ◽  
Jinsoo Park ◽  
Sungbo Cho
Keyword(s):  
Real Time ◽  
Electrical Impedance ◽  
Label Free ◽  
Impedance Characterization

Electrical Impedance Based Characterization of Wettability During Electrostatic Suppression of the Leidenfrost State

2019 ◽  
Author(s):  
Onur Ozkan ◽  
Vaibhav Bahadur
Keyword(s):  
Heat Transfer ◽  
Electrical Impedance ◽  
Statistical Nature ◽  
Impedance Measurements ◽  
Threshold Voltages ◽  
Different Temperatures ◽  
Order Of Magnitude ◽  
Wetted Area ◽  
Impedance Characterization

Abstract An electric field can suppress the Leidenfrost state by electrostatically attracting liquid to the surface, which results in significantly higher heat transfer. This study highlights and quantifies the statistical nature of wetting during electrostatic suppression via electrical impedance characterization of Leidenfrost pools. Firstly, electrical impedance characterization is used to study the onset of suppression of the Leidenfrost state. Two different threshold voltages are defined and measured. The first threshold voltage corresponds to the onset of transient (intermittent) wetting and the second threshold corresponds to the onset of continuous wetting. The effect of the temperature and the applied AC waveform frequency on the threshold voltages is studied. Next, the wetted area is measured for different temperatures and voltages. The statistical nature of wetting during electrostatic suppression of the Leidenfrost state is characterized. The measured wetting enhancement indicates that heat transfer can be enhanced by an order of magnitude via electrostatic suppression. Together, these results provide an in-depth understanding of electrostatic suppression, and highlight electrical impedance measurements as a powerful diagnostic tool for this field.

Electrical Impedance Characterization of Bi Doped BaTiO3 Prepared through Chemical Route

2010 ◽  
Vol 116 (1) ◽  
pp. 151-160 ◽  
Author(s):  
K. Sreenu ◽  
G. S. Kumar ◽  
N. V. Prasad ◽  
M. Vithal ◽  
G. Prasad
Keyword(s):  
Electrical Impedance ◽  
Chemical Route ◽  
Impedance Characterization
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