Shielding the magnetic field from a transcranial stimulator using aluminium and iron: Simulation and experimental results

2015 ◽  
Author(s):  
Nuno Saraiva Santos ◽  
Sonia C. P. Sousa ◽  
Paulo Crespo ◽  
Pedro Cavaleiro Miranda ◽  
Ricardo Salvador ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Experimental Results ◽  
The Magnetic Field

Experimental Research on the Magnetic Field Sensitive Polymeric Actuator

2011 ◽  
Vol 287-290 ◽  
pp. 603-607
Author(s):  
Chun Lin Xia ◽  
Yang Fang Wu ◽  
Qian Qian Lu
Keyword(s):  
Magnetic Field ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Energy Conversion ◽  
Experimental Research ◽  
Experimental Results ◽  
Deformation Characteristics ◽  
Analysis Software ◽  
Element Analysis ◽  
The Magnetic Field

Using domestic MFSP membrane as a medium of energy conversion, a kind of MFSP actuator was designed. The dedicated test equipment was constructed for experimental research, and the experimental results were given. The strip and circular MSFP membrane were analyzed qualitatively to obtain the deformation characteristics of membrane by finite element analysis software.

Viscosity of Potassium Dihydrogen Phosphate Aqueous Solution within Magnetic Field

2017 ◽  
Vol 898 ◽  
pp. 1783-1786
Author(s):  
Lei Zhang ◽  
Yi Su ◽  
Yu Lin Wu ◽  
Yao Liu ◽  
Yong Wang ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Aqueous Solution ◽  
Field Intensity ◽  
Magnetic Field Intensity ◽  
Extreme Values ◽  
Potassium Dihydrogen Phosphate ◽  
Experimental Results ◽  
Dihydrogen Phosphate ◽  
Potassium Dihydrogen ◽  
The Magnetic Field

The viscosity of potassium dihydrogen phosphate, KH2PO4 (KDP), aqueous solution within magnetic field was studied. Experimental results showed that, the viscosity of saturated KDP solution exhibited multiple extreme values when the magnetic field intensity increased from 0 Gs to 2250 Gs. Influences of the magnetic field intensity on the viscosity of KDP solution were very complicated. It’s concerned with the temperature and the concentration of solution. As the KDP was produced from aqueous solution within magnetic field, the temperature and the concentration of solution also needed to be carefully controlled. Magnetic field with intensity values of 300 Gs, 600 Gs and 1800 Gs, all have the strong effects on the structures of KDP aqueous solution.

Analysis of Vibration Characteristics of Magnetorheological Elastomer Sandwich Beam under Non-Homogeneous Magnetic Field

2011 ◽  
Vol 101-102 ◽  
pp. 202-206 ◽  
Author(s):  
Guo Liang Hu ◽  
Miao Guo ◽  
Wei Hua Li
Keyword(s):  
Magnetic Field ◽  
Natural Frequency ◽  
Sandwich Beam ◽  
Homogeneous Magnetic Field ◽  
Experimental Results ◽  
Magnetorheological Elastomer ◽  
Test Rig ◽  
Thin Aluminum ◽  
Set Up ◽  
The Magnetic Field

In this study, the MRE was manufactured, and the sandwich beam was also fabricated by treating with MRE between two thin aluminum layers. The experiment test rig was set up to investigate the vibration response of the MRE sandwich beam under non-homogeneous magnetic field. The experimental results show that the MRE sandwich beam had the capabilities of left shifting first natural frequency when the magnetic field was increased in the activated regions. It is also obvious that the first natural frequency of the MRE sandwich beam decreased as the magnetic field that applied on the beam was moved from the clamped end of the beam to the free end of the beam.

Effect of Magnetostatic Energy on the Magnetic Driving Forces and Field Induced Superelastic Behavior in Ni-Mn-Ga

2013 ◽  
Vol 738-739 ◽  
pp. 405-410 ◽  
Author(s):  
Alexander A. Likhachev
Keyword(s):  
Magnetic Field ◽  
Driving Forces ◽  
Theoretical Concept ◽  
Experimental Results ◽  
Magnetostatic Energy ◽  
Mechanical Cycling ◽  
Magnetostatic Coupling ◽  
Superelastic Behavior ◽  
The Magnetic Field

Abstract. Present publication gives a general theoretical concept and also presents the relevant experimental results concerning the effect of the magnetostatic coupling between the twin layers on the magnetic-field-controlled superelastic behavior during the mechanical cycling in magnetic field in Ni-Mn-Ga.

Experiment Using a Magnetically Controlled Ferrofluid Flow in a Flatplate Laminar Flow System

2014 ◽  
Vol 896 ◽  
pp. 444-447
Author(s):  
Yi Hua Fan ◽  
Liao Yong Lou ◽  
Yu Ming Chen
Keyword(s):  
Magnetic Field ◽  
Laminar Flow ◽  
Magnetic Particles ◽  
Flow System ◽  
Experimental Results ◽  
Carrier Fluid ◽  
Field Coefficient ◽  
Coefficient Of Viscosity ◽  
Relationship Of ◽  
The Magnetic Field

The Phenomenon of a Magnetic Controlled Ferrofluid Flow in the Flat Plate Laminar Flow System is Discussed in this Paper. the Ferrofluid Flow is One Kind of Colloid Mixture, which is Composited by the Magnetic Particles, Carrier Fluid and Surfactant. its Motion is Followed the Fluid Dynamics and can be Controlled by a Magnetic Field. from the Theoretic Analysis and the Experimental Test, the Coefficient of Viscosity of the Ferrofluid Flow will be Affected by the Magnetic Field. Thus, an Experimental Rig is Built to Test the Influences of the Gap of the Plate and the Strength and Direction of the Magnetic Field for Several Ferrofluid Flows with Different Dividing Rates of Volume. Experimental Results Showed that the Coefficient of Viscosity of the Ferrofluid Flow is Almost Not Upgrading in a Wide Gap Condition by the Magnetic Field, but as the Gap is Smaller, the Coefficient of Viscosity will be Promoted Obviously. Furthermore, Enhancing the Magnetic Field, it will be Increase the Coefficient of Viscosity of the Ferrofluid Flow. from the Experimental Results, the Relationship of the Magnetic Field, Coefficient of Viscosity of Ferrofluid Flow and the Carrier Fluid can be Confirmed.

Magnetic Properties and Phase Diagram of Quasi-two-dimensional Na2Co2TeO6 Single Crystal Under High Magnetic Field

2021 ◽  
Author(s):  
Guiling Xiao ◽  
Zhengcai Xia ◽  
Yujie Song ◽  
Lixia Xiao
Keyword(s):  
Magnetic Field ◽  
Phase Transition ◽  
Phase Diagram ◽  
Magnetic Phase ◽  
Magnetic Coupling ◽  
Experimental Results ◽  
Antiferromagnetic Coupling ◽  
Magnetic Field Direction ◽  
Antiferromagnetic Ordering ◽  
The Magnetic Field

Abstract We investigated the magnetic characteristics of Na2Co2TeO6 at different temperatures and magnetic field. The experimental results indicated that the magnetic field can disturb the antiferromagnetic interaction and lead to the disorder. Magnetization curves measured with different angles θ (θ is between the magnetic field direction and c axis) express the magnetocrystalline anisotropy in this system. when the angle θ=0 (magnetic field parallel to c axis), two continuous magnetic phase transitions at critical temperature TN1 and TN3 were observed. As θ changes, TN1 is almost independent on θ, indicating the magnetic ordering at TN1 was a spontaneous behavior with a robust AFM characteristic. On the other hand, as θ increases from 0 to 180, TN3 presents extreme value at θ=90 (magnetic field perpendicular to c axis). It indicates that TN3 were sensitive to temperature and magnetic fields. At some angles closing to ab plane, an additional phase transition was observed at TN2. This phase transition at TN2 may mainly result from the long range antiferromagnetic ordering within ab-plane. Furthermore, the magnetization measurement up to 50 T revealed the strong antiferromagnetic coupling in the system, and in which the magnetic coupling within the honeycomb layers is strong and the magnetic coupling interaction between honeycomb layers is weaker. Based on the experimental results, we have obtained the complete magnetic phase diagram.

Effect of a magnetic field on phase transformation of steel

2001 ◽  
Vol 16 (8) ◽  
pp. 2280-2282 ◽  
Author(s):  
W. Liu ◽  
D. R. Ou ◽  
H. H. Zhou ◽  
G. Y. Tang ◽  
F. Wu
Keyword(s):  
Magnetic Field ◽  
Free Energy ◽  
Phase Transformation ◽  
Electromagnetic Theory ◽  
Metals And Alloys ◽  
Experimental Results ◽  
Nucleation Process ◽  
The Magnetic Field ◽  
Magnetization Processes

Electromagnetic theory is used to characterize the magnetization processes in metals and alloys. The analysis shows that the free energy of a phase transformation may be reduced or enhanced by the magnetic field depending on the ratio of the permeability of the old and new phases. This means that the magnetic field can either stimulate or inhibit the nucleation process. The theory is in accord with the experimental results by others and us.

Dynamic Testing of Magnetic Elastomer Material Prototypes

2019 ◽  
Vol 945 ◽  
pp. 369-373 ◽  
Author(s):  
A.J. Minaev ◽  
J.V. Korovkin
Keyword(s):  
Magnetic Field ◽  
Frequency Response ◽  
Dynamic Characteristics ◽  
Dynamic Testing ◽  
Considerable Effect ◽  
Experimental Results ◽  
New Materials ◽  
Resonant Frequencies ◽  
Input And Output ◽  
The Magnetic Field

This research is aimed at obtaining the experimental dynamic characteristics of new materials (magnetoactive elastomers exposed to the magnetic field). It demonstrates that the strength of a magnetic field has a considerable effect on the increase in the resonant frequencies of tested materials. For tests, we used a vibration stand equipped with virtual meters to visualize the experimental results on a computer display. We herein present an example of recording the frequency response on the magnetic elastomer sample input and output when exposed to vibrations caused by the unbalanced motor forces.

Magnetic susceptibility of buckytubes

1994 ◽  
Vol 9 (6) ◽  
pp. 1578-1582 ◽  
Author(s):  
X.K. Wang ◽  
R.P.H. Chang ◽  
A. Patashinski ◽  
J.B. Ketterson
Keyword(s):  
Magnetic Field ◽  
Magnetic Susceptibility ◽  
Electronic Structure ◽  
Room Temperature ◽  
Bulk Sample ◽  
Experimental Results ◽  
Structure Model ◽  
Field Parallel ◽  
Room Temperature Magnetic Susceptibility ◽  
The Magnetic Field

The measured room temperature magnetic susceptibility of a bulk sample of buckytubes (buckybundle) is −10.75 × 10−6 emu/g for the magnetic field parallel to the buckybundle axis, which is approximately 1.1 times the perpendicular value and 30 times larger than that of C60. The experimental results are discussed in terms of a graphite-like electronic structure model.

scholarly journals Impact of Magnetic Field on Variation of Partial Discharges Parameters in the Insulation Model with a Distributed Defect

2020 ◽  
Vol 20 (4) ◽  
pp. 64-69
Keyword(s):  
Magnetic Field ◽  
Experimental Technique ◽  
Partial Discharges ◽  
Experimental Results ◽  
Alternating Magnetic Field ◽  
Data Series ◽  
Experimental Setup ◽  
Mathematical Methods ◽  
New Phase ◽  
The Magnetic Field

The paper presents the experimental results of studies into the influence of an alternating magnetic field on the changes in the partial discharges parameters in the model of insulation with a distributed defect. The studies were carried out on a developed experimental setup, isolation model and based on the author's experimental technique. The research confirms the influence of the magnetic field on changes in the amplitude, number of pulses and intensity of partial discharges in practice. The analysis of the obtained data series for the reliability of differences was carried out using mathematical methods. Based on the results of the analysis of the phase-distributed patterns of the occurrence of partial discharges, the repeated appearance of additional discharges in new phase windows under the additional action of an alternating magnetic field was established.

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