In situ Transmission Electron Microscopy (TEM) techniques can potentially fill in gaps in the current understanding interfacial phenomena in complex oxides. Select multiferroic oxide materials, such as BiFeO(3) (BFO), exhibit ferroelectric and magnetic order, and the two order parameters are coupled through a quantum-mechanical exchange interaction. The magneto-electric coupling in BFO allows c...

We report experimental evidence that submicron-scale local coercivity variation determines magnetization reversal dynamics in ferromagnetic thin films. Local coercivity distribution is generated from a twodimensional array of hysteresis loops each of 0.3230.32 mm spots simultaneously measured using a magneto-optical microscope magnetometer. We directly demonstrate that domain reversal pattern i...

We present magneto-optical measurements on two liquid crystals that exhibit a wide temperature-range amorphous blue phase (BPIII). Magnetic fields up to 25 T are found to suppress the onset of BPIII in both materials by almost 1 °C. This effect appears to increase nonlinearly with the field strength. The effect of high fields on established BPIIIs is also reported, in which we find significant ...

We have investigated the dynamics of flux penetration into thin superconducting YBa2Cu307--x films using a magneto-optic technique with nanosecond time resolution. For films carrying large shielding currents an instability in the magnetic Aux distribution is discovered, which can be triggered by a local’perturbation, e.g., by a focused laser pulse. The instability develops in the form of fine r...

We investigate the ultrafast spin dynamics in an epitaxial hcp(11¯00) cobalt thin film. By performing pump–probe magneto-optical measurements with magnetization along either easy or hard magnetic axis, we determine demagnetization and recovery time for two axes. observe average of 33% slower which attribute to magneto-crystalline anisotropy electron–phonon coupling, supported by our ab initio c...

An analytical model for the soil carbon and nitrogen cycles is studied from the dynamical system point of view. Its main nonlinearities and feedbacks are analyzed by considering the steady state solution under deterministic hydro-climatic conditions. It is shown that, changing hydroclimatic conditions, the system undergoes dynamical bifurcations, shifting from a stable focus to a stable node an...

In this paper, the stability of a functionally graded magneto-electro-elastic (FG-MEE) micro-beam under actuation of electrostatic pressure is studied. For this purpose Euler-Bernoulli beam theory and constitutive relations for magneto-electro-elastic (MEE) materials have been used. We have supposed that material properties vary exponentially along the thickness direction of the micro-beam. Gov...

Rapidly oscillating Ap stars exhibit an astrophysically interesting combination of strong, dipolar-like magnetic fields and high-overtone p-mode pulsations similar to the Sun. Recent time-resolved spectroscopy of these stars unravelled a complex picture of propagating magneto-acoustic pulsation waves, with amplitude and phase strongly changing as a function of atmospheric height. To interpret t...