Papers by Keyword: Thermal Fluctuation

Abstract: Field dependent polaron transport in a conjugated polymer chain is studied numerically with local thermal fluctuations taken into account. Within a dynamical evolution method, a polaron moves from the left to the right side of the polymer chain in the presence of an applied electric field. Local lattice fluctuations are assumed to occur in a random way. The local thermal fluctuations are found to be equivalent to a potential barrier for the polaron. The range of the thermally disturbed region in the molecule and the effective temperature difference resulted from asymmetric thermal absorptions determine the height of the barrier. The intra-molecule polaron mobility obeys a logarithmic law in low electric field range provided that there exist asymmetric thermal absorptions within the molecule.

Abstract: The presence on any variation in the magnetization direction of an island has a detrimental effect on the ability to recover recorded data.To approve this,Ansys Finite Element Method software has been used to simulate the magnetic field intensity distribution in bit patterned media,from the result, It is seen the magnetization direction variations because of thermal fluctuation can cause errors,But this errors can not diffusion, It is isolated.

Abstract: We consider unstable motion in small magnetic particles, driven by an external magnetic field and influenced by thermal fluctuations. Our studies demonstrate both temporal and spatial complexity of the dynamics in this system. The results are obtained using numerical simulations of the Landau-Lifshitz-Gilbert equations.