The broadband ferromagnetic resonance FMR linewidth of the free layer of magnetic tunnel junctions is used as a simple diagnostic of the quality of the magnetic structure. The FMR linewidth increases near the field regions of free layer reversal and pinned layer reversal, and this increase correlates with an increase in magnetic hysteresis in unpatterned films, low-frequency noise in patterned ...

The dynamic transition between the ordered flow and the plastic flow is studied for a two-dimensional driven vortex lattice, in the presence of sharp and dense pinning centers, from numerical simulations. For this system, which does not show smectic ordering, the lattice exhibits a first order transition from a crystal to a liquid, shortly followed by the dynamical transition to the plastic flo...

Using x-ray magnetic circular dichroism, we have detected the very interfacial spins that are responsible for the horizontal loop shift in three different exchange bias sandwiches, chosen because of their potential for device applications. The "pinned" uncompensated interfacial spins constitute only a fraction of a monolayer and do not rotate in an external magnetic field since they are tightly...

Here, we describe a dual spin valve structure with distinct switching fields for two pinned layers. A device with this structure has a staircase of three distinct magnetoresistive states. The multiple resistance states are achieved by controlling the exchange coupling between two ferromagnetic pinned layers and two adjacent antiferromagnetic pinning layers. The maximum magnetoresistance ratio i...

Dynamic analysis of supported pipes conveying pulsating fluid is investigated in Hamiltonian system using precise integration method PIM . First, symplectic canonical equations of supported pipes are deduced with state variable vectors composed of displacement and momentum. Then, PIM with linear interpolation formula is proposed to solve these equations. Finally, this approach’s precision is te...

We derive exact results for displacement fields that develop as a response to external pinning forces in two dimensional athermal networks. For triangular lattice arrangement of particles interacting through soft potentials, we Green's function formalism which use produced by localized forces. show the continuum limit decay $1/r$ at large distances $r$ away from force dipole. Finally, extend ou...

We revisit the problem of pinning a reaction-diffusion front by defect, in particular reaction-free region. Using collective variables for and numerical simulations, we compare behaviors bistable monostable front. A can be pinned as confirmed criterion, analysis time independant simulations. Conversely, never pinned, it gives rise to secondary pulse past defect calculate this takes appear. Thes...