Electronic Coupling among the Five Nanomolecules Shuts Down Quantum Tunneling in the Presence and Absence of an Applied Magnetic Field for Indication of the Dimer or other Provide Different Influences on the Magnetic Behavior of Single Molecular Magnets (SMMs) as Qubits for Quantum Computing

2017 ◽  
Vol 04 (02) ◽  
Author(s):  
Alireza Heidari
Keyword(s):  
Magnetic Field ◽  
Quantum Computing ◽  
Applied Magnetic Field ◽  
Quantum Tunneling ◽  
Magnetic Behavior ◽  
Molecular Magnets ◽  
Electronic Coupling ◽  
Presence And Absence

Magnetic behavior of a mixed spin-1 and spin-72Blume–Capel model on the Bethe lattice in the presence of an applied magnetic field

2016 ◽  
Vol 90 (3) ◽  
pp. 268-288 ◽  
Author(s):  
M. Karimou ◽  
R. A. Yessoufou ◽  
F. K. Guedje ◽  
C. Aïnamon ◽  
F. Hontinfinde
Keyword(s):  
Magnetic Field ◽  
Applied Magnetic Field ◽  
Bethe Lattice ◽  
Magnetic Behavior ◽  
Mixed Spin

scholarly journals Quantum tunneling and phase transitions in spin systems with an applied magnetic field

1998 ◽  
Vol 58 (9) ◽  
pp. 5554-5562 ◽  
Author(s):  
S.-Y. Lee ◽  
H. J. W. Müller-Kirsten ◽  
D. K. Park ◽  
F. Zimmerschied
Keyword(s):  
Magnetic Field ◽  
Phase Transitions ◽  
Applied Magnetic Field ◽  
Quantum Tunneling ◽  
Spin Systems

scholarly journals Enhanced Magnetic Behavior of Cobalt Nano-Rods Elaborated by the Polyol Process Assisted with an External Magnetic Field

Nanomaterials ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 334 ◽  
Author(s):  
Mohamed Ali Bousnina ◽  
Amel Dakhlaoui-Omrani ◽  
Frédéric Schoenstein ◽  
Yaghoub Soumare ◽  
Aliou Hamady Barry ◽  
...  
Keyword(s):  
Magnetic Field ◽  
External Magnetic Field ◽  
Aspect Ratio ◽  
Applied Magnetic Field ◽  
Coercive Field ◽  
Permanent Magnets ◽  
Magnetic Behavior ◽  
Particle Morphology ◽  
Nano Rods ◽  
Hcp Structure

Cobalt nano-rods with the hexagonal close-packed (hcp) structure were prepared by reduction of the long-chain carboxylate Co (II) precursor in polyol. The application of an external magnetic field (µ0H = 1.25 T) during the nucleation and growth steps resulted in a noticeable modification of the mean aspect ratio (length/diameter) of the particles. The particle morphology was also modified as the nano-rods did not exhibit conical heads at their extremities anymore, which are observed for particles prepared without application of an external magnetic field. Besides, the stacking faults density along the c axis of the hcp structure in the cobalt nano-rods has been found to decrease with the increase in the applied magnetic field. The coercive field of randomly oriented nano-rods increased with the aspect ratio, showing the highest value (i.e., 5.8 kOe at 300 K) for the cobalt nano-rods obtained under the highest applied magnetic field. For partially oriented Co nano-rods in toluene solution, the magnetic properties were significantly enhanced with a coercive field of 7.2 kOe at 140 K, while the magnetization saturation reached 92% of the bulk. The MR/MS value was about 0.8, indicating a good orientation of the anisotropic particles relative to each other, making them suitable for the preparation of permanent magnets via a bottom-up approach.

scholarly journals Generation of Reverse Meniscus Flow by Applying An Electromagnetic Brake

2021 ◽  
Author(s):  
Alexander Vakhrushev ◽  
Abdellah Kharicha ◽  
Ebrahim Karimi-Sibaki ◽  
Menghuai Wu ◽  
Andreas Ludwig ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Lorentz Force ◽  
Applied Magnetic Field ◽  
Numerical Study ◽  
Flow Direction ◽  
Experimental Studies ◽  
Submerged Entry Nozzle ◽  
Mean Flow ◽  
Slab Caster ◽  
The Mean

AbstractA numerical study is presented that deals with the flow in the mold of a continuous slab caster under the influence of a DC magnetic field (electromagnetic brakes (EMBrs)). The arrangement and geometry investigated here is based on a series of previous experimental studies carried out at the mini-LIMMCAST facility at the Helmholtz-Zentrum Dresden-Rossendorf (HZDR). The magnetic field models a ruler-type EMBr and is installed in the region of the ports of the submerged entry nozzle (SEN). The current article considers magnet field strengths up to 441 mT, corresponding to a Hartmann number of about 600, and takes the electrical conductivity of the solidified shell into account. The numerical model of the turbulent flow under the applied magnetic field is implemented using the open-source CFD package OpenFOAM®. Our numerical results reveal that a growing magnitude of the applied magnetic field may cause a reversal of the flow direction at the meniscus surface, which is related the formation of a “multiroll” flow pattern in the mold. This phenomenon can be explained as a classical magnetohydrodynamics (MHD) effect: (1) the closure of the induced electric current results not primarily in a braking Lorentz force inside the jet but in an acceleration in regions of previously weak velocities, which initiates the formation of an opposite vortex (OV) close to the mean jet; (2) this vortex develops in size at the expense of the main vortex until it reaches the meniscus surface, where it becomes clearly visible. We also show that an acceleration of the meniscus flow must be expected when the applied magnetic field is smaller than a critical value. This acceleration is due to the transfer of kinetic energy from smaller turbulent structures into the mean flow. A further increase in the EMBr intensity leads to the expected damping of the mean flow and, consequently, to a reduction in the size of the upper roll. These investigations show that the Lorentz force cannot be reduced to a simple damping effect; depending on the field strength, its action is found to be topologically complex.

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