Self-diffusion as a criterion for melting of dust crystal in the presence of magnetic field

Begum, Mahmuda; Das, Nilakshi

doi:10.1140/epjp/i2016-16046-2

Cited by 17 publications

(21 citation statements)

References 27 publications

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“…Our numerical simulations are directly motivated by previous numerical studies of diffusion in magnetized 3D Yukawa systems [19,39], studies on the connection between caging and diffusion in 2D Yukawa systems [40], and studies that identify superdiffusion in 2D magnetized systems [12,41]. Earlier investigations of non-magnetized Yukawa systems [33,[42][43][44][45][46] provide valuable references for the methodology, the possible presence of superdiffusion, and numerical data.…”

Section: MD Simulationsmentioning

confidence: 99%

Self-diffusion in two-dimensional quasimagnetized rotating dusty plasmas

et al. 2019

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The self-diffusion phenomenon in a two-dimensional dusty plasma at extremely strong (effective) magnetic fields is studied experimentally and by means of molecular dynamics simulations. In the experiment the high magnetic field is introduced by rotating the particle cloud and observing the particle trajectories in a co-rotating frame, which allows reaching effective magnetic fields up to 3000 Tesla. The experimental results confirm the predictions of the simulations: (i) super-diffusive behavior is found at intermediate timescales and (ii) the dependence of the self-diffusion coefficient on the magnetic field is well reproduced.

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Section: MD Simulationsmentioning

confidence: 99%

Self-diffusion in two-dimensional quasimagnetized rotating dusty plasmas

et al. 2019

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“…Thermophysical properties such as thermal conductivity [2][3][4][5], diffusion [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37] and viscosity [38] play an important role in system design, optimization and have various applications in many processes.…”

Section: Introductionmentioning

confidence: 99%

“…It determines the energy dissipation or stopping power in the eld of Yukawa (CPs) systems. The diffusion of dust grain also plays a vital role in exploring the dynamical properties of various physical, chemical and biological systems [20][21][22][23][24][25][26][27][28][29][30][31][32][33][34][35][36][37]. An extensive amount of previous theoretical predictions, computer simulations, and experiments have understood the diffusion of a dust grain in CPs without an electric eld.…”

Section: Introductionmentioning

confidence: 99%

Diffusion coefficients of electrorheological complex (dusty) plasmas

Shakoori

Shahzad

et al. 2022

J Mol Model

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Equilibrium molecular dynamics (EMD) simulations have been executed to investigate the parallel (D ) and perpendicular (D ┴ ) diffusion coe cients for three-dimensional (3D) strongly coupled (SC) electrorheological complex (dusty) plasmas (ERCPs). The effects of uniaxial (z-axis) ac electric eld (M T ) on dust grains have been investigated along with various combinations of plasma parameters (Γ, κ). The new outcomes obtained by mean squared displacement of Einstein relation show diffusion coe cients for low-intermediate to high plasma couplings (Γ) for varying M T . The D and D ┴ at M T = 0.01 are agree well with earlier available data obtained from the Green-Kubo and Einstein relation for 3D SC-Yukawa systems. The simulation data show that D increase with an increase of moderate M T strength and D ┴ decreased for the intermediate to large M T strength Both (D , D ┴ ) remained nearly constant for low M T values. The investigations show that the current EMD scheme is more e cient for nonideal gas-like, liquids-like and solid-like states of SC-ERCPs. It has been demonstrated that present simulation outcomes extended the M T range up to 0.01 ≤ M T ≤ 10 to understand the diffusive and rheological behavior of dusty plasmas systems.

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“…However, the direct effect of magnetic field on the dust grain dynamics has not been taken into account. Mahmuda et al 20 have reported that the self-diffusion is a criterion for melting of dust crystal in the presence of magnetic field. A detailed investigation of crystalline behavior and phase transition of dusty plasma in presence of magnetic field is important for the point of understanding of fundamental physics as well as for production and control of the properties of dust crystal.…”

Section: Introductionmentioning

confidence: 99%

“…Some recent theoretical works have shown that the phase transition phenomenon can also be controlled by varying magnetic field strength [17][18][19][20] . Presence of magnetic field alters the internal energy of the particulates in plasma and hence affects the points of phase transition from solid to liquid state.…”

Section: Introductionmentioning

confidence: 99%

Effect of magnetic field on the phase transition in a dusty plasma

et al. 2017

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The formation of self-consistent crystalline structure is a well-known phenomenon in complex plasmas. In most experiments the pressure and rf power are the main controlling parameters in determining the phase of the system. We have studied the effect of externally applied magnetic field on the configuration of plasma crystals, suspended in the sheath of a radio-frequency discharge using the Magnetized Dusty Plasma Experiment (MDPX) device. Experiments are performed at a fixed pressure and rf power where a crystalline structure is formed within a confining ring. The magnetic field is then increased from 0 to 1.28 T. We report on the breakdown of the crystalline structure with increasing magnetic field. The magnetic field affects the dynamics of the plasma particles and first leads to a rotation of the crystal. At higher magnetic field, there is a radial variation (shear) in the angular velocity of the moving particles which we believe leads to the melting of the crystal. This melting is confirmed by evaluating the variation of the pair correlation function as a function of magnetic field.Comment: 9 pages, 5 figure

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Self-diffusion as a criterion for melting of dust crystal in the presence of magnetic field

Cited by 17 publications

References 27 publications

Self-diffusion in two-dimensional quasimagnetized rotating dusty plasmas

Self-diffusion in two-dimensional quasimagnetized rotating dusty plasmas

Diffusion coefficients of electrorheological complex (dusty) plasmas

Effect of magnetic field on the phase transition in a dusty plasma

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