Magnetic Torque due to Anisotropic Diamagnetism in Neutral BEDT-TTF Crystals

In order to realize the intervention operation in the unstructured and ample environments such as stomach and colon, a dual-spin spherical capsule robot (DSCR) driven by pure magnetic torque generated by the universal rotating magnetic field (URMF) is proposed. The coupled magnetic torque, the viscoelastic friction torque, and the gravity torque were analyzed. Furthermore, the posture dynamic model describing the electric-magnetic-mechanical-liquid coupling dynamic behavior of the DSCR in the gastrointestinal (GI) tract was established. This model is a second-order periodic variable coefficient dynamics equation, which should be regarded as an extension of the Lagrange case for the dual-spin body system under the fixed-point motion, since the external torques were applied. Based on the Floquet–Lyapunov theory, the stability domain of the DSCR for the asymptotically stable motion and periodic motion were obtained by investigating the influence of the angular velocity of the URMF, the magnetic induction intensity, and the centroid deviation. Research results show that the DSCR can realize three kinds of motion, which are asymptotically stable motion, periodic motion, and chaotic motion, according to the distribution of the system characteristic multipliers. Moreover, the posture stability of the DSCR can be improved by increasing the angular velocity of the URMF and reducing the magnetic induction intensity.

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Magnetic torque and convection in the earth's core

Studia Geophysica et Geodaetica ◽

10.1007/bf01613263 ◽

1977 ◽

Vol 21 (3-4) ◽

pp. 320-325

Author(s):

Gustáv Siráň ◽

I. Cupal

Keyword(s):

Magnetic Torque ◽

Earth’S Core ◽

Earth's Core

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Magnetic torque properties for the case of mixed

IEEE Transactions on Magnetics ◽

10.1109/tmag.1975.1058978 ◽

1975 ◽

Vol 11 (6) ◽

pp. 1649-1654 ◽

Cited By ~ 1

Author(s):

W. Swift ◽

W. Reynolds ◽

D. Thornburg

Keyword(s):

Magnetic Torque

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Magnetic torque measurements on cubic manganese ferrites

Czechoslovak Journal of Physics ◽

10.1007/bf01724948 ◽

1971 ◽

Vol 21 (11) ◽

pp. 1187-1197 ◽

Cited By ~ 6

Author(s):

Z. Šimša ◽

V. Roskovec ◽

P. Novák ◽

V. A. M. Brabers

Keyword(s):

Magnetic Torque ◽

Torque Measurements

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An Investigation of Eddy Current, Solid Loss, Induced Voltage and Magnetic Torque in Highly Pure Thin Conductors, Using Finite Element Method

Procedia Materials Science ◽

10.1016/j.mspro.2015.11.016 ◽

2015 ◽

Vol 11 ◽

pp. 412-417 ◽

Cited By ~ 2

Author(s):

M. Jalali Mehrabad ◽

M.H. Ehsani

Keyword(s):

Finite Element Method ◽

Finite Element ◽

Eddy Current ◽

Induced Voltage ◽

Magnetic Torque ◽

Solid Loss ◽

Thin Conductors ◽

Element Method

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Design And Development Of Power And Attitude Control Subsystems For RYESAT

10.32920/ryerson.14656356 ◽

2021 ◽

Author(s):

Michael William Richard. Alger

Keyword(s):

Attitude Control ◽

Sliding Mode ◽

Attitude Motion ◽

Critical Systems ◽

Magnetic Torque ◽

Design And Development ◽

Control Laws ◽

Spacecraft Control ◽

Standard Interface ◽

Data Bus

This thesis describes the design and development of Ryerson University's first CubeSat (RyeSat) with a focus on power and attitude control subsystems. This satellite is intended to become the initial of a series of CubeSats built by Ryerson University to perform research in spacecraft control algorithms and actuators. RyeSat is built around a standard interface, which specifies both a data-bus and a switchable power supply system for non critical systems. To facilitate the development of this satellite a prototype power subsystem was created, programmed and tested. In addition to developing the system's architecture and power subsystem; analysis was preformed to size both reaction wheels and magnetic torquers. This analysis showed that a commercially available motor could be adapted to fulfill the attitude control requirements of a CubeSat and also showed that miniature magnetic torque rods would be more efficient that magnetic torque coils typically used on CubeSats. Finally, control laws for these actuators were designed and an adaptive nonlinear sliding mode controller for reaction wheels was applied to control the 3-axis attitude motion of RyeSat.

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Orbital torque in magnetic bilayers

Nature Communications ◽

10.1038/s41467-021-26650-9 ◽

2021 ◽

Vol 12 (1) ◽

Author(s):

Dongjoon Lee ◽

Dongwook Go ◽

Hyeon-Jong Park ◽

Wonmin Jeong ◽

Hye-Won Ko ◽

...

Keyword(s):

Heavy Metal ◽

Hall Effect ◽

Spin Current ◽

Spin Hall Effect ◽

Spin Orbit ◽

Magnetic Torque ◽

Device Applications ◽

Metal Bilayers ◽

Experiment Analysis ◽

Theory And Experiment

AbstractThe orbital Hall effect describes the generation of the orbital current flowing in a perpendicular direction to an external electric field, analogous to the spin Hall effect. As the orbital current carries the angular momentum as the spin current does, injection of the orbital current into a ferromagnet can result in torque on the magnetization, which provides a way to detect the orbital Hall effect. With this motivation, we examine the current-induced spin-orbit torques in various ferromagnet/heavy metal bilayers by theory and experiment. Analysis of the magnetic torque reveals the presence of the contribution from the orbital Hall effect in the heavy metal, which competes with the contribution from the spin Hall effect. In particular, we find that the net torque in Ni/Ta bilayers is opposite in sign to the spin Hall theory prediction but instead consistent with the orbital Hall theory, which unambiguously confirms the orbital torque generated by the orbital Hall effect. Our finding opens a possibility of utilizing the orbital current for spintronic device applications, and it will invigorate researches on spin-orbit-coupled phenomena based on orbital engineering.

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