Manipulation of magnetic field on dielectric constant and electric polarization in Cr2WO6

2014 ◽  
Vol 104 (13) ◽  
pp. 132908 ◽  
Author(s):  
Y. Fang ◽  
L. Y. Wang ◽  
Y. Q. Song ◽  
T. Tang ◽  
D. H. Wang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Dielectric Constant ◽  
Electric Polarization

Generation of Electric Polarization with Rotating Magnetic Field in Helimagnet ZnCr2Se4

2008 ◽  
Vol 77 (4) ◽  
pp. 043709 ◽  
Author(s):  
Hiroshi Murakawa ◽  
Yoshinori Onose ◽  
Kenya Ohgushi ◽  
Shintaro Ishiwata ◽  
Yoshinori Tokura
Keyword(s):  
Magnetic Field ◽  
Electric Polarization ◽  
Rotating Magnetic Field

scholarly journals Large linear magnetoelectric effect and field-induced ferromagnetism and ferroelectricity in DyCrO4

2019 ◽  
Vol 11 (1) ◽  
Author(s):  
Xudong Shen ◽  
Long Zhou ◽  
Yisheng Chai ◽  
Yan Wu ◽  
Zhehong Liu ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Electric Field ◽  
Spin Structure ◽  
Magnetoelectric Effect ◽  
Electric Polarization ◽  
Metamagnetic Transition ◽  
Ferromagnetic Component ◽  
Antiferromagnetic Structure ◽  
Field Control ◽  
Ferromagnetic Magnetization

Abstract All the magnetoelectric properties of scheelite-type DyCrO4 are characterized by temperature- and field-dependent magnetization, specific heat, permittivity, electric polarization, and neutron diffraction measurements. Upon application of a magnetic field within ±3 T, the nonpolar collinear antiferromagnetic structure leads to a large linear magnetoelectric effect with a considerable coupling coefficient. An applied electric field can induce the converse linear magnetoelectric effect, realizing magnetic field control of ferroelectricity and electric field control of magnetism. Furthermore, a higher magnetic field (>3 T) can cause a metamagnetic transition from the initially collinear antiferromagnetic structure to a canted structure, generating a large ferromagnetic magnetization up to 7.0 μB f.u.−1. Moreover, the new spin structure can break the space inversion symmetry, yielding ferroelectric polarization, which leads to coupling of ferromagnetism and ferroelectricity with a large ferromagnetic component.

Effect of Magneto-Optical Material Dielectric Constant on Internal Axial Magnetic Field of Solenoid Modulated by Alternating Current

2018 ◽  
Vol 38 (4) ◽  
pp. 0426002
Author(s):  
杨志勇 Yang Zhiyong ◽  
蔡伟 Cai Wei ◽  
张志利 Zhang Zhili ◽  
邢俊晖 Xing Junhui ◽  
赵云芳 Zhao Yunfang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Dielectric Constant ◽  
Axial Magnetic Field ◽  
Alternating Current ◽  
Optical Material

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.

The magnetic field dependence of the dielectric constant of liquids

1981 ◽  
Vol 62 (1-2) ◽  
pp. 207-216
Author(s):  
T.M. Plantenga ◽  
J. Bulthuis ◽  
J.P. Van Dieren ◽  
W. Mels ◽  
C. MacLean
Keyword(s):  
Magnetic Field ◽  
Dielectric Constant ◽  
Field Dependence ◽  
Magnetic Field Dependence ◽  
The Magnetic Field

Conduction electron diamagnetism in alloys and magnetic-field-dependent dielectric constant of a Fermi gas

1964 ◽  
Vol 280 (1380) ◽  
pp. 85-96 ◽  
Keyword(s):  
Magnetic Field ◽  
Dielectric Constant ◽  
Free Electrons ◽  
Impurity Potential ◽  
First Order ◽  
Dilute Alloys ◽  
A Value ◽  
Field Dependent ◽  
Self Consistency ◽  
The Magnetic Field

The diamagnetism of free electrons in the presence of charged impurity centres which are sufficiently dilute to be non-interacting is calculated to first order in the strength of the potential of the impurity centre. This is done by combining the density-matrix treatment of Landau diamagnetism with the impurity-screening theory o f March & Murray. The susceptibility involves the integrated value of the impurity potential through the crystal, and its first derivative with respect to the magnetic field, B. If the impurity potential is assumed to have a value appropriate to B — 0, then the result for the change in diamagnetic susceptibility on alloying agrees with that of Kohn & Luming (1963). It is shown, however, that the impurity potential is modified in the presence of the magnetic field, and in particular it has angular dependence. The correction to the dia­magnetic susceptibility due to this self-consistency is shown to be significant (25% ). The relevance of the theory to experimental results on dilute alloys is briefly discussed. Finally, as a by-product of the investigation, we have obtained interesting results about the form of the field-dependent dielectric constant.

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