Probing magneto-elastic phenomena through an effective spin-bath coupling model

Magneto-elastic coupling model of deformable anisotropic superconductors

We develop a magneto-elastic (ME) coupling model for the interaction between the vortex lattice and crystal elasticity. The theory extends the Kogan-Clem’s anisotropic Ginzburg-Landau (GL) model to include the elasticity effect. The anisotropies in superconductivity and elasticity are simultaneously considered in the GL theory frame. We compare the field and angular dependences of the magnetiza...

Non-adiabatic Laser Induced Spin Coupling Phenomena

remaining a pure state. Mixing coefficients are given by a and b with a + b = 1. When allowed external Zeeman or Stark interactions are switched on, which exceed the internal interaction energy C, then states |l'> and |2'> become pure basis states |l> and |2> respectively as a •*• 1 and b * 0. This problem is solved for four levels explictly in ref. 1 for the case of spin-rotation interaction i...

Magneto-elastic Coupling in the Layered Manganite La1.2Sr1.8Mn2O7

We have studied the magneto-elastic coupling in the double layered Mn perovskite La1.2Sr1.8Mn2O7 with an ultrasonic velocity technique. The temperature profile of both the in-plane and out-of-plane longitudinal velocities showed a large stiffening anomaly below the insulating paramagnetic to metallic ferromagnetic transition. Magnetic fluctuations effects consistent with the layered structure a...

Magneto-Spatial Dispersion Phenomena

An integrable model for stable:unstable wave coupling phenomena

We report instability structures and nonlinear phenomena that arise when unstable and stable nonlinear wave fields are coupled nonlinearly. This interaction is modelled with an integrable system of cubic nonlinear Schrödinger (NLS) equations and plane wave data. The linearized analysis is straightforward, and robust to non-integrable perturbations. The coupled nonlinear Schrödinger (CNLS) model...