Optical Detection by a La_0.67Ca_0.33MnO_3-y Thin-Film Microbridge

Abstract

We study the dynamics of a three-dimensional laser bullet propagating inside a nonlinear saturable medium. We show that an increase of the pump parameter destabilizes the bullet and leads to its destruction through oscillations with increasing amplitude. We propose an inhomogeneous and anisotropic external excitation mechanism leading to a stable oscillating bullet. By varying the frequency of the external excitation, a stable quasi-in-phase or quasi-antiphase internal state can be reached.

Thermal response of grained La0.67Ca0.33MnO3films to microwave radiation

“…Electrical properties of both single crystals of the manganites [6,7] and their thin films [8][9][10][11] were studied recently either by applying dc or microwave current, by using short laser pulses, as well as by employing various resonant techniques [12][13][14].…”