DIPOLE-DIPOLE INTERACTION IN A SUPERCONDUCTOR

1994 ◽  
Vol 08 (24) ◽  
pp. 1517-1528
Author(s):  
Z.J. YANG
Keyword(s):  
Interaction Energy ◽  
Magnetic Dipole ◽  
Magnetic Induction ◽  
Dipole Interaction ◽  
Magnetic Dipoles ◽  
Magnetic Induction Distribution ◽  
Theory Of Superconductivity ◽  
London Theory

Based on the London theory and the Pippard theory of superconductivity, we have calculated the magnetic induction distribution from a magnetic dipole located in a superconductor. The results have been used to evaluate the interaction energy between two magnetic dipoles located in the superconductor. The relevant applications of these calculations have been discussed briefly.

LEVITATION FORCE BETWEEN A SHORT MAGNETIC BAR AND A SUPERCONDUCTING CYLINDER IN THE MEISSNER STATE

2006 ◽  
Vol 20 (24) ◽  
pp. 1549-1557 ◽  
Author(s):  
M. K. ALQADI ◽  
F. Y. ALZOUBI ◽  
H. M. AL-KHATEEB ◽  
N. Y. AYOUB
Keyword(s):  
Interaction Energy ◽  
Magnetic Dipole ◽  
Levitation Force ◽  
Orientation Angle ◽  
Interaction Model ◽  
Dipole Interaction ◽  
Meissner State ◽  
Analytical Expression ◽  
Superconducting Cylinder ◽  
Physical Dimensions

We have calculated the levitation force and interaction energy between a short magnetic bar and a superconducting cylinder in the Meissner state using the dipole–dipole interaction model. We derived analytical expression of the levitation force acting on the short magnet as a function of the orientation angle of magnetic dipole, and the physical dimensions of the magnet-superconductor system. The effects of the thickness of the superconductor and the length of the magnet on the levitation force were studied.

scholarly journals Concentration-dependent oscillation of specific loss power in magnetic nanofluid hyperthermia

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Ji-wook Kim ◽  
Jie Wang ◽  
Hyungsub Kim ◽  
Seongtae Bae
Keyword(s):  
Magnetic Dipole ◽  
Critical Role ◽  
Dipole Interaction ◽  
Superparamagnetic Nanoparticles ◽  
Physical Reason ◽  
Strong Concentration ◽  
Magnetic Nanofluid ◽  
Specific Loss ◽  
Specific Loss Power ◽  
Magnetic Nanofluid Hyperthermia

AbstractMagnetic dipole coupling between the colloidal superparamagnetic nanoparticles (SPNPs) depending on the concentration has been paid significant attention due to its critical role in characterizing the Specific Loss Power (SLP) in magnetic nanofluid hyperthermia (MNFH). However, despite immense efforts, the physical mechanism of concentration-dependent SLP change behavior is still poorly understood and some contradictory results have been recently reported. Here, we first report that the SLP of SPNP MNFH agent shows strong concentration-dependent oscillation behavior. According to the experimentally and theoretically analyzed results, the energy competition among the magnetic dipole interaction energy, magnetic potential energy, and exchange energy, was revealed as the main physical reason for the oscillation behavior. Empirically demonstrated new finding and physically established model on the concentration-dependent SLP oscillation behavior is expected to provide biomedically crucial information in determining the critical dose of an agent for clinically safe and highly efficient MNFH in cancer clinics.

scholarly journals Development of improved performance electromagnetic valve for liquid rocket engine

2020 ◽  
Vol 19 (4) ◽  
pp. 30-42
Author(s):  
A. A. Igolkin ◽  
T. A. Chubenko ◽  
A. D. Maksimov
Keyword(s):  
Magnetic Induction ◽  
High Performance ◽  
Rocket Engine ◽  
Mathematic Model ◽  
Liquid Rocket Engine ◽  
Electromagnetic Valve ◽  
Magnetic Induction Distribution ◽  
Improved Performance ◽  
Liquid Rocket ◽  
Distribution Field

The problem of developing optimal-design electromagnetic valves is relevant for many industries. The development of technology is characterized by increased power and pressures used for actuator mechanisms, as well as by reducing the dimensions and mass of automatic units. The goal of this article is to develop an advanced electromagnetic valve that would ensure optimal combination of high performance, reliability, technological effectiveness and minimal cost. On the basis of standard dependences for electromagnetic phenomena a mathematic model of a SU.1 valve was developed. It was calculated in several special-purpose software packages: NISA, FEMM, ANSYS Maxwell. Parametric analysis was implemented in ANSYS Maxwell for variable working gap settings and values of current force in the solenoid. As a result, the magnetic induction distribution field was obtained. The results of modeling the operation of the electromagnetic valve and the magnetic induction distribution field are presented for variable working gap settings and different values of current force in the solenoid. The model of an advanced electromagnetic valve for a liquid rocket engine was developed on the basis of the dependences obtained. The duration of single engine firing obtained is 40 msec. The results obtained make it possible to create a valve with hold-open time of 800msec, which is considered sufficient for application in electromagnetic direct current valves.

Magnetic dipole interaction studied by the differential angular correlation method

1963 ◽  
Vol 40 ◽  
pp. 656-669 ◽  
Author(s):  
E. Matthias ◽  
L. Boström ◽  
Alice Maciel ◽  
M. Salomon ◽  
T. Lindqvist
Keyword(s):  
Angular Correlation ◽  
Magnetic Dipole ◽  
Correlation Method ◽  
Dipole Interaction ◽  
Magnetic Dipole Interaction
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