نتایج جستجو برای: magneto hydro dynamics

تعداد نتایج: 460799  

Journal: :Journal of High Energy Physics 2021

A bstract We use the Crooks fluctuation theorem [1, 2] together with Zubarev hydro- dynamics [3] to develop a bottom-up theory of hydrodynamic fluctuations. also thermodynamic uncertainity relations estimate limits dissipative transport coefficients.

Journal: :Journal of Physics: Condensed Matter 2021

The Landau-Lifshitz-Gilbert (LLG) equation, used to model magneto-dynamics in ferromagnets, tacitly assumes that the angular momentum associated with spin precession can relax instantaneously when real or effective magnetic field causing is turned off. This neglect of "spin inertia" unphysical and would violate energy conservation. Recently, LLG equation was modified account for inertia effects...

Journal: :international journal of environmental research 0

the current state of whitefish population and their organisms have been investigated in subarctic lake chuna exposed to long-term air pollution from copper-nickel industry. both annual and long-term heavy metals and acid oxides loads on the lake have been determined. a qualitative assessment has been made for water and bottom sediments. the investigation results have been compared with those of...

MS Omar, TA Abbas,

The temperature dependence of magneto-optical and magneto-photoconductivity measurements were carried out in the range of (200-330) K. A home made optical cryostat was used for the measurements. The measured room temperature value of the energy gap was found to be 2.211 eV. The temperature coefficient of energy gap was found to be -5.48×10-4 eV/K obtained by the optical absorption method and -4...

Journal: :Engineering Letters 2008
Y. H. Eng Michael Wai Shing Lau Eicher Low Gerald Seet C. S. Chin

good dynamics model is essential and critical for the successful design of navigation and control system of an underwater vehicle. However, it is difficult to determine the hydro-dynamics forces, especially the added mass and the drag coefficients. In this paper, a new experimental method has been used to find the hydrodynamics forces for the ROV II, a remotely operated underwater vehicle. The ...

Journal: :Communications physics 2023

Abstract Macroscopic superconducting components are an important building block of various quantum circuits. Since several the envisioned applications require exposure to magnetic fields, it is utmost importance explore impact fields on their performance. Here we complex pattern field penetration and identify its resonance frequency NbTiN resonators by combining magneto-optical imaging high-fre...

Journal: :Optics express 2010
T Zigdon A D Wilson-Gordon S Guttikonda E J Bahr O Neitzke S M Rochester D Budker

We report measurements of nonlinear magneto-optical rotation (NMOR) for the D2 line of 87Rb atoms in an antirelaxation-coated vapor cell in the presence of a radio-frequency (rf) field. The experimental NMOR signals as a function of rf field frequency for various rf field powers are compared to a theoretical model based on the density-matrix formalism. The comparison betwe...

Journal: :Physical review letters 2012
S O Mariager F Pressacco G Ingold A Caviezel E Möhr-Vorobeva P Beaud S L Johnson C J Milne E Mancini S Moyerman E E Fullerton R Feidenhans'l C H Back C Quitmann

We use time-resolved x-ray diffraction and magneto-optical Kerr effect to study the laser-induced antiferromagnetic to ferromagnetic phase transition in FeRh. The structural response is given by the nucleation of independent ferromagnetic domains (τ(1)~30 ps). This is significantly faster than the magnetic response (τ(2)~60 ps) given by the subsequent domain realignment. X-ray diffraction shows...

2004
R. Wester

We present quantitative measurements of the photoassociation of cesium molecules inside a far-detuned optical dipole trap. A model of the trap depletion dynamics is derived which allows to extract absolute photoassociation rate coefficients for the initial single-photon photoassociation step from measured trap-loss spectra. The sensitivity of this approach is demonstrated by measuring the Franc...

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