Microwave Characterization of Y3Fe5O12 Ferrite Under a dc-Magnetic Field

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.

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

Research Society and Development ◽

10.33448/rsd-v10i14.22189 ◽

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.

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In situ microwave characterization of microwire composites with external magnetic field

Applied Physics Letters ◽

10.1063/1.4712126 ◽

2012 ◽

Vol 100 (19) ◽

pp. 192903 ◽

Cited By ~ 16

Author(s):

F. X. Qin ◽

C. Brosseau ◽

H. X. Peng ◽

H. Wang ◽

J. Sun

Keyword(s):

Magnetic Field ◽

External Magnetic Field ◽

Microwave Characterization

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I-V characteristic behavior of BSCCO-2223 superconductor under low intensity DC magnetic fields a Home-Made Experiment

Journal of Experimental Techniques and Instrumentation ◽

10.30609/jeti.v1i2.5682 ◽

2018 ◽

Vol 1 (2) ◽

Author(s):

Guilherme Botega Torsoni ◽

Gustavo Quereza Freitas ◽

Claudio Luis Carvalho

Keyword(s):

Magnetic Field ◽

Electrical Resistance ◽

Electrical Characterization ◽

Electrical Current ◽

Double Step ◽

Dc Magnetic Field ◽

Low Intensity ◽

Current Voltage ◽

Copper Coil

Electrical characterization of superconductor materials exposed to external magnetic field play a important role for many technological applications. In this paper, the electrical characterization of Bi-2223 pellet prepared by conventional route was performed. The electrical resistance temperaturedependence (RxT), showed a superconductor transition at around 105 K. The current-voltage (I-V) behavior under magnetic field and temperature has been investigated, the results point to a powerlaw dependence between the electrical current (I) and applied voltage (V), at different conditions, as described by the literature. The external DC magnetic field, was produced by a simple home-made apparatus, where a simple copper coil was used to produce an external DC magnetic field between 2,0 mT and 8,0 mT. Then, the dependence of the critical current (Ic) on magnetic field and temperature has been studied, revealing a double step behavior DOI:http://dx.doi.org/10.30609/JETI.2018-2.5682

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