The Bias-Controlled Magnetoimpedance Effect in a MIS Structure

2015 ◽  
Vol 233-234 ◽  
pp. 451-455
Author(s):  
Dmitry A. Smolyakov ◽  
Anton S. Tarasov ◽  
Arthur O. Gustaitsev ◽  
Nikita V. Volkov
Keyword(s):  
Magnetic Field ◽  
Applied Magnetic Field ◽  
Mis Structure ◽  
Giant Magnetoimpedance ◽  
Metal Insulator ◽  
Giant Magnetoimpedance Effect ◽  
The Real ◽  
Mis Diode ◽  
The Magnetic Field ◽  
Pronounced Peak

We report the giant magnetoimpedance effect in a ferromagnetic metal/insulator/semiconductor (MIS) diode with the Schottky barrier based on the Fe/SiO2/n-Si structure. It was established that the applied magnetic field strongly influences the impedance of the structure in the temperature range 10—30 K. In this range, there is the pronounced peak in the temperature dependence of the real part of the impedance at frequencies from 10 Hz to 1 MHz. The effect of the magnetic field manifests itself as a shift of the peak of the real part of the impedance. Under the action of a bias voltage of 5 V, the peak of the real part of the impedance similarly shifts toward lower temperatures with and without applied magnetic field.

Influence of AC Driving Current on Magneto-Impedance Effect in Glass-Covered Co-Based Microwire

2011 ◽  
Vol 335-336 ◽  
pp. 324-327
Author(s):  
Bin Tian ◽  
Hua Shi
Keyword(s):  
Magnetic Field ◽  
Low Frequency ◽  
Giant Magnetoimpedance ◽  
Double Peak ◽  
Giant Magnetoimpedance Effect ◽  
Driving Current ◽  
Ac Current ◽  
Amorphous Microwires ◽  
The Magnetic Field ◽  
Range Of Values

The influence of ac driving current on the frequency dependence in the range from 0.1 to 20 MHz of the giant magnetoimpedance effect (GMI) of glass-covered amorphous microwires were investigated. The dependence of GMI for a range of values of ac current (from 0.5 mA to 20 mA) flowing along the microwire has been measured in as-prepared samples. The double-peak feature is changed to the single-peak festure and the magnetic field at which the value of GMI reaches a maximum should increase with the higher the amplitude of the ac at low frequency. It was found that the change of GMI related to circular coercivity.

scholarly journals Reversals in the large-scale αΩ-dynamo with memory

2015 ◽  
Vol 22 (4) ◽  
pp. 361-369 ◽  
Author(s):  
L. K. Feschenko ◽  
G. M. Vodinchar
Keyword(s):  
Magnetic Field ◽  
Power Law ◽  
Geomagnetic Field ◽  
Large Scale ◽  
Magnetic Polarity ◽  
Power Law Model ◽  
The Real ◽  
Geomagnetic Polarity ◽  
With Memory ◽  
The Magnetic Field

Abstract. Inversion of the magnetic field in a model of large-scale αΩ-dynamo with α-effect with stochastic memory is under investigation. The model allows us to reproduce the main features of the geomagnetic field reversals. It was established that the polarity intervals in the model are distributed according to the power law. Model magnetic polarity timescale is fractal. Its dimension is consistent with the dimension of the real geomagnetic polarity timescale.

Influence of Applied Magnetic Field on a Wire-Plate Electrostatic Precipitators Under Multi-Field Coupling

2013 ◽  
Vol 135 (8) ◽  
Author(s):  
Jian-Ping Zhang ◽  
Yong-Xia Dai ◽  
Jiong-Lei Wu ◽  
Jian-Xing Ren ◽  
Helen Wu ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Applied Magnetic Field ◽  
Fine Particles ◽  
Collection Efficiency ◽  
Mathematic Model ◽  
Average Diameter ◽  
Dust Particles ◽  
Particle Dynamic ◽  
Electrostatic Precipitators ◽  
The Magnetic Field

The aim of this work is to find an effective method to improve the collection efficiency of electrostatic precipitators (ESPs). A mathematic model of an ESP subjected to the external magnetic field was proposed. The model considered the coupled effects between the gas flow field, particle dynamic field and electromagnetic field. Particles following a Rosin-Rammler distribution were simulated under various conditions and the influence of the magnetic field density on the capture of fine particles was investigated. The collection efficiency and the escaped particle size distribution under different applied magnetic field intensities were discussed. Particle trajectories inside the ESP under aerodynamic and electromagnetic forces were also analyzed. Numerical results indicate that the collection efficiency increases with the increase of applied magnetic field. It was also found that a stronger applied magnetic field results in a larger particle deflection towards the dust collection plates. Furthermore, the average diameter of escaping particles decreases and the dispersion of dust particles with different sizes increases with the increasingly applied magnetic field. Finally, the average diameter decreases almost linearly with the magnetic field until it drops to a certain value. The model proposed in this work is able to obtain important information on the particle collection phenomena inside an industrial ESP under the applied magnetic field.

Effects of Electromagnetic Fields on the Quantum Yield of Free Radicals in Cryptochrome

2019 ◽  
Vol 953 ◽  
pp. 127-132
Author(s):  
Yu Ling Chen ◽  
Du Yan Geng ◽  
Chuan Fang Chen
Keyword(s):  
Magnetic Field ◽  
Electromagnetic Field ◽  
Free Radicals ◽  
Free Radical ◽  
Quantum Yield ◽  
Electromagnetic Fields ◽  
Applied Magnetic Field ◽  
Geomagnetic Field ◽  
Quantum Biology ◽  
The Magnetic Field

In this paper, the effects of the quantum yield of free radicals in cryptochrome exposed to different electromagnetic fields were studied through the quantum biology. The results showed that the spikes characteristics was produced in the free radicals in cryptochrome, when it exposed to the applied magnetic field (ω = 50 Hz, B0 = 50 μT). The spikes produced by the electromagnetic field was independent of the changes of polar θ. When the frequency of the magnetic field increased, the spikes characteristics produced in unit time also increased. These results showed that the environmental electromagnetic field could affect the response of organisms to the geomagnetic field by influencing the quantum yield in the mechanism of free radical pair.It provided a basis for studying the influence of environmental electromagnetic field on biology, especially the navigation of biological magnetism.

Electromagnetic damping of elastic waves: Experimental results

1968 ◽  
Vol 5 (4) ◽  
pp. 825-829 ◽  
Author(s):  
F. E. M. Lilley ◽  
C. M. Carmichael
Keyword(s):  
Magnetic Field ◽  
Elastic Wave ◽  
Applied Magnetic Field ◽  
Elastic Waves ◽  
Applied Field ◽  
Eddy Currents ◽  
Electrical Conductor ◽  
Electromagnetic Damping ◽  
The Waves ◽  
The Magnetic Field

The passage of an elastic wave causes straining and translation in the transmitting material. If a magnetic field is applied, and the medium is an electrical conductor, some of the energy of the wave is dissipated by the flow of electrical eddy currents. Usually the amount of energy lost is very small, but it may be greatly increased if the applied field is strongly non-uniform.Laboratory experiments are described which demonstrate this effect for standing elastic waves in a metal bar. The applied magnetic field changes from almost zero to its full strength over a distance which is short compared to the length of the standing wave. The result of this strong non-uniformity is that the energy lost due to the translation of the bar in the field greatly exceeds the energy lost due to the straining of the bar in the field.The dependence of the attenuation of the waves by the magnetic field is investigated for variation in frequency of vibration, bar thickness, and field gradient.

Metal–insulator transition tuned by magnetic field in Bi1.7V8O16 hollandite

2017 ◽  
Vol 5 (20) ◽  
pp. 4967-4976 ◽  
Author(s):  
Amber M. Larson ◽  
Brandon Wilfong ◽  
Pouya Moetakef ◽  
Craig M. Brown ◽  
Peter Zavalij ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Applied Magnetic Field ◽  
Insulator Transition ◽  
Orbital Ordering ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
Metal To Insulator Transition

Bi1.7V8O16 undergoes a metal-to-insulator transition driven by charge and orbital ordering that can be tuned by an applied magnetic field.

The effect of a magnetic field on the impurity band density of states in the atomic limit

1982 ◽  
Vol 60 (12) ◽  
pp. 1743-1750 ◽  
Author(s):  
K. L. Liu ◽  
P. Modrak ◽  
B. Bergersen
Keyword(s):  
Magnetic Field ◽  
Density Of States ◽  
Gaussian Model ◽  
Impurity Band ◽  
Metal Insulator ◽  
Atomic Limit ◽  
Doped Silicon ◽  
Hydrogenic Model ◽  
Type Response ◽  
The Magnetic Field

A marked magnetic field dependence is found for the impurity band density of states in an idealized model of a doped semiconductor. The calculations are based on the Hubbard model in the atomic limit. We have obtained exactly the first eight moments of the distribution using a Gaussian model for the hopping integral, and the first seven moments with a hydrogenic model. A simple Zeeman type response of the spin system to the magnetic field is assumed. The predicted density of states is then obtained using a modified moment method with a trial density of states function obtained from the expected asymptotic behaviour of the distribution. Finally, we adjust the parameters of our models to correspond to phosphorous doped silicon below the metal insulator transition.

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