Vector vortex state preservation in the Fresnel cylindrical diffraction

2021 ◽  
Author(s):  
Yanwen Hu ◽  
Guangcui Mo ◽  
Zixian Ma ◽  
Shenhe Fu ◽  
Si-Qi Zhu ◽  
...  
Keyword(s):  
Vortex State

Tuning the Magnetic Vortex State in Magnetite Nanodiscs for Remote Control of Biological Signalling

2019 ◽  
Author(s):  
Danijela Gregurec ◽  
Alexander W. Senko ◽  
Andrey Chuvilin ◽  
Pooja Reddy ◽  
Ashwin Sankararaman ◽  
...  
Keyword(s):  
Remote Control ◽  
Ion Channels ◽  
Ground State ◽  
Magnetic Particles ◽  
Colloidal Stability ◽  
Vortex State ◽  
Magnetic Vortex ◽  
Electron Holography ◽  
Dipole Interactions ◽  
Magnetite Particles

In this work, we demonstrate the application of anisotropic magnetite nanodiscs (MNDs) as transducers of torque to mechanosensory cells under weak, slowly varying magnetic fields (MFs). These MNDs possess a ground state vortex configuration of magnetic spins which affords greater colloidal stability due to eliminated dipole-dipole interactions characteristic of isotropic magnetic particles of similar size. We first predict vortex magnetization using micromagnetic stimulations in sub-micron anisotropic magnetite particles and then use electron holography to experimentally investigate the magnetization of MNDs 98–226 nm in diameter. When MNDs are coupled to MFs, they transition between vortex and in-plane magnetization allowing for the exertion of the torque on the pN scale, which is sufficient to activate mechanosensitive ion channels in cell membranes.<br>

scholarly journals Vortex State Microwave Resistivity in Tl-2212 Thin Films

2007 ◽  
Vol 20 (1) ◽  
pp. 43-49 ◽  
Author(s):  
N. Pompeo ◽  
S. Sarti ◽  
R. Marcon ◽  
H. Schneidewind ◽  
E. Silva
Keyword(s):  
Thin Films ◽  
Vortex State ◽  
Microwave Resistivity

Josephson vortex state across the phase diagram ofLa2−xSrxCuO4: A magneto-optics study

2005 ◽  
Vol 71 (5) ◽  
Author(s):  
S. V. Dordevic ◽  
Seiki Komiya ◽  
Yoichi Ando ◽  
Y. J. Wang ◽  
D. N. Basov
Keyword(s):  
Phase Diagram ◽  
Vortex State ◽  
Josephson Vortex

Penetration depth and core radius μSR measurements in the vortex state near the lower critical field

2003 ◽  
Vol 326 (1-4) ◽  
pp. 296-299 ◽  
Author(s):  
R.I. Miller ◽  
R.F. Kiefl ◽  
J.H. Brewer ◽  
J.C. Chakhalian ◽  
S. Dunsiger ◽  
...  
Keyword(s):  
Penetration Depth ◽  
Critical Field ◽  
Vortex State ◽  
Core Radius ◽  
Lower Critical Field

AC flow effect on a vortex state in thin4He superfluid films on porous glass

1996 ◽  
Vol 46 (S1) ◽  
pp. 143-144 ◽  
Author(s):  
Muneyuki Fukuda ◽  
Maxim K. Zalalutdinov ◽  
Vladimir Kovacik ◽  
Takeshi Igarashi ◽  
Minoru Kubota
Keyword(s):  
Porous Glass ◽  
Vortex State ◽  
Flow Effect ◽  
Superfluid Films

scholarly journals Symmetry-breaking phase transitions in highly concentrated semen

2016 ◽  
Vol 13 (123) ◽  
pp. 20160575 ◽  
Author(s):  
Adama Creppy ◽  
Franck Plouraboué ◽  
Olivier Praud ◽  
Xavier Druart ◽  
Sébastien Cazin ◽  
...  
Keyword(s):  
Collective Motion ◽  
Sperm Concentration ◽  
Vortex State ◽  
Local Alignment ◽  
Macroscopic Theory ◽  
Vicsek Model ◽  
Highly Active ◽  
Self Organized ◽  
Self Motion ◽  
Fresh Semen

New experimental evidence of self-motion of a confined active suspension is presented. Depositing fresh semen sample in an annular shaped microfluidic chip leads to a spontaneous vortex state of the fluid at sufficiently large sperm concentration. The rotation occurs unpredictably clockwise or counterclockwise and is robust and stable. Furthermore, for highly active and concentrated semen, richer dynamics can occur such as self-sustained or damped rotation oscillations. Experimental results obtained with systematic dilution provide a clear evidence of a phase transition towards collective motion associated with local alignment of spermatozoa akin to the Vicsek model. A macroscopic theory based on previously derived self-organized hydrodynamics models is adapted to this context and provides predictions consistent with the observed stationary motion.

Ginzburg–Landau theory of the Abrikosov vortex state near the upper critical field

1982 ◽  
Vol 60 (3) ◽  
pp. 299-303 ◽  
Author(s):  
A. E. Jacobs
Keyword(s):  
Critical Field ◽  
Landau Theory ◽  
Upper Critical Field ◽  
Vortex State ◽  
Quantization Condition ◽  
Abrikosov Vortex ◽  
Ginzburg Landau ◽  
Type Ii Superconductors ◽  
Flux Quantization ◽  
The Magnetic Field

A method which preserves the flux-quantization condition in all orders of perturbation theory is applied to the Ginzburg–Landau theory of type-II superconductors near the upper critical field. Expansions are obtained for the order parameter, the magnetic field, and the free energy; previous results are verified and extended to one higher order in Hc2 – Ha.

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