Potential and force between a magnet and a bulk Y1Ba2Cu3O7-δsuperconductor studied by a mechanical pendulum

Yang, Zhe; Johansen, T. H.; Bratsberg, H.; Helgesen, Geir; Skjeltorp, A. T.

doi:10.1088/0953-2048/3/12/004

Cited by 45 publications

(22 citation statements)

References 23 publications

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“…The magnetic bridge is to magnetic circuit what electrical wires are to electric one; it allows to close the magnetic field. The magnetic field generated by these two cuboidal magnets can be evaluated using the analytical expression of [ 45 ], based on [ 46 ]. Note that the results fully agree with [ 47 ] provided that the magnetization field B r e z is added within the magnet.…”

Section: Thruster Magnetic Propertiesmentioning

confidence: 99%

Experimental and theoretical study of magnetohydrodynamic ship models

et al. 2017

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Magnetohydrodynamic (MHD) ships represent a clear demonstration of the Lorentz force in fluids, which explains the number of students practicals or exercises described on the web. However, the related literature is rather specific and no complete comparison between theory and typical small scale experiments is currently available. This work provides, in a self-consistent framework, a detailed presentation of the relevant theoretical equations for small MHD ships and experimental measurements for future benchmarks. Theoretical results of the literature are adapted to these simple battery/magnets powered ships moving on salt water. Comparison between theory and experiments are performed to validate each theoretical step such as the Tafel and the Kohlrausch laws, or the predicted ship speed. A successful agreement is obtained without any adjustable parameter. Finally, based on these results, an optimal design is then deduced from the theory. Therefore this work provides a solid theoretical and experimental ground for small scale MHD ships, by presenting in detail several approximations and how they affect the boat efficiency. Moreover, the theory is general enough to be adapted to other contexts, such as large scale ships or industrial flow measurement techniques.

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Section: Thruster Magnetic Propertiesmentioning

confidence: 99%

Experimental and theoretical study of magnetohydrodynamic ship models

et al. 2017

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“…Such a geometry provides a unique magnetic map. For the analytical analysis of the magnetic field the method presented in [10] was used together with standard descriptions for motion degrees of freedom.…”

Section: Methodsmentioning

confidence: 99%

Analytical Modelling of Magnetic Multimedia Control Elements Based on a Single Magnetic Sensor

et al. 2018

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Magnetic multimedia control elements have many advantages in comparison with other systems based on mechanical, electrical, or optical readout. For system layouting, the practicality of analytical models over extensive numerical simulation was demonstrated in the past. In this work, we apply the analytical approach to design magnetic multimedia control elements. Particularly, we focus on a joystick that includes only a single 3D magnetic sensor and can be used in continuous operating mode. Presented results relate to a system based on a single permanent magnet and a single 3D sensor. The scheme was used to build a prototype to perform prove of principle experiments. A semi-analytic method to determine positions of the joystick from the observed magnetic field is discussed.

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“…where 𝜇 0 is the vacuum permeability, 𝜇 𝑟 is the relative permeability of the magnetic material and 𝑁 𝑥 is its demagnetizing factor [13].…”

Section: Device Sensitivity and Resolutionmentioning

confidence: 99%