scholarly journals Controllable Inductors and Transformers Based On Ferromagnet-Piezoelectric Heterostructuresformers Based On Ferromagnet-Piezoelectric Heterostructures

2021 ◽  
Vol 13 (1) ◽  
pp. 27-38
Author(s):  
Leonid Yu. Fetisov ◽  
◽  
Dmitry V. Chashin ◽  
Yuri K. Fetisov ◽  
◽  
...  
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Electric Field ◽  
Low Power ◽  
Transfer Coefficient ◽  
Piezoelectric Layer ◽  
Magnetoelectric Effect ◽  
Electrical Circuits ◽  
Radio Engineering ◽  
Transformation Ratio

The elements of electrical circuits, which inductance L can be tuned electrically (the so-called "inductors"), and transforemers are used in modern electronics, radio engineering and low-power energy for galvanic isolation of circuits and converting voltage amplitudes. In this work, new devices of this type have been manufactured and investigated, using the magnetoelectric effect in ferromagnetic-piezoelectric heterostructures. The inductance of the manufactured inductor is tuned by 400% by a control electric field of up to 10 kV/cm applied to the piezoelectric layer of the structure, and by 1000% by an external magnetic field of up to 10 Oe, acting on the structure. The transformer operates in the range of input voltages of 0-8 V, has a power transfer coefficient of 30% and a voltage transformation ratio of 0-14, tunable by a control magnetic field of up to 80 Oe. Methods for calculating the characteristics of magnetoelectric inductor and transformer are described.

Effect of external magnetic field on lane formation in driven pair-ion plasmas

2021 ◽  
Vol 87 (2) ◽  
Author(s):  
Swati Baruah ◽  
U. Sarma ◽  
R. Ganesh
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Field Strength ◽  
Electric Field ◽  
Electric Field Strength ◽  
Coupling Parameter ◽  
Critical Parameters ◽  
Coulomb Coupling ◽  
Lane Formation ◽  
Parameter Values

Lane formation dynamics in externally driven pair-ion plasma (PIP) particles is studied in the presence of external magnetic field using Langevin dynamics (LD) simulation. The phase diagram obtained distinguishing the no-lane and lane states is systematically determined from a study of various Coulomb coupling parameter values. A peculiar lane formation-disintegration parameter space is identified; lane formation area extended to a wide range of Coulomb coupling parameter values is observed before disappearing to a mixed phase. The different phases are identified by calculating the order parameter. This and the critical parameters are calculated directly from LD simulation. The critical electric field strength value above which the lanes are formed distinctly is obtained, and it is observed that in the presence of the external magnetic field, the PIP system requires a higher value of the electric field strength to enter into the lane formation state than that in the absence of the magnetic field. We further find out the critical value of electric field frequency beyond which the system exhibits a transition back to the disordered state and this critical frequency is found as an increasing function of the electric field strength in the presence of an external magnetic field. The movement of the lanes is also observed in a direction perpendicular to that of the applied electric and magnetic field directions, which reveals the existence of the electric field drift in the system under study. We also use an oblique force field as the external driving force, both in the presence and absence of the external magnetic field. The application of this oblique force changes the orientation of the lane structures for different applied oblique angle values.

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.

scholarly journals Параметрическое усиление магнитоакустических колебаний в структуре ферромагнетик-пьезоэлектрик

2020 ◽  
Vol 46 (4) ◽  
pp. 52
Author(s):  
Д.А. Бурдин ◽  
Д.В. Чашин ◽  
Н.А. Экономов ◽  
Ю.К. Фетисов
Keyword(s):  
Magnetic Field ◽  
Electric Field ◽  
Lead Zirconate Titanate ◽  
Piezoelectric Layer ◽  
Ferromagnetic Layer ◽  
Lead Zirconate ◽  
Parametric Amplification ◽  
Bias Magnetic Field ◽  
Disk Resonator ◽  
Double Frequency

Parametric amplification of magnetoacoustic oscillations was observed in a disk resonator containing a ferromagnetic layer of FeBSiC and a piezoelectric layer of lead zirconate-titanate. Oscillations with a frequency of 3.08 kHz were excited and recorded using two coils with orthogonal axes. Pumping was performed by an electric field with a double frequency applied to the piezoelectric layer. The amplification of vibrations arises due to a change in the rigidity of the structure under influence of an electric field. It is shown that the gain can be changed using a permanent bias magnetic field applied to the structure.

Effect of External Magnetic Field on the Flow and Heat Transfer in DC Arc Plasma Torch

2010 ◽  
Vol 97-101 ◽  
pp. 2797-2800
Author(s):  
Da Pei Tang ◽  
Qing Gao ◽  
Ying Hui Li ◽  
Fan Xiu Lu
Keyword(s):  
Magnetic Field ◽  
Heat Transfer ◽  
Temperature Field ◽  
External Magnetic Field ◽  
Flow Field ◽  
Electric Field ◽  
Diamond Film ◽  
Plasma Torch ◽  
Current Intensity ◽  
Flow And Heat Transfer

A multiple fields’ coupled model of new magnetic controlled DC plasma torch, which was used for CVD diamond film, was presented. In this model, the effects of electric field and magnetic field on the flow field and temperature field were taken into account, and the fluid dynamics equations were modified by the addition of some source terms relating to electromagnetic field, such as Lorentz force, joule heating, and radiative cooling. Conversely, the generalized ohm’s law was used to solve the current density, which reflected the effects of flow field and temperature field on the electric field and magnetic field. In addition, the rest Maxwell’s equations and external solenoid magnetic field equation were also modeled. In order to know the effect of external magnetic field on the torch, the current intensity of external solenoid was chosen to simulate its influence on the flow and heat transfer in the torch. Results show that external magnetic field plays a part in stirring the plasma, which is advantageous for the preparation of diamond film. The larger the external solenoid current intensity is, the better the uniformity of the temperature and velocity of plasma is.

Influence of low external magnetic field on electric field induced strain behavior of 9/70/30, 9/65/35 and 9/60/40 PLZT ceramics

2016 ◽  
Vol 42 (11) ◽  
pp. 13223-13231 ◽  
Author(s):  
Siripong Somwan ◽  
Narit Funsueb ◽  
Apichart Limpichaipanit ◽  
Athipong Ngamjarurojana
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Electric Field ◽  
Strain Behavior ◽  
Electric Field Induced Strain
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