Synthesis of high-temperature superconductive and colossal magnetoresistive surfaces on insulating particles

The surfaces of insulating alumina particles have been coated with high-temperature superconducting YBa2Cu3O7-x, and colossal magnetoresistive Pr0.65Ba0.05Ca0.3MnO3-x , films. These coatings on particulate surfaces have been realized using a technique which is based on laser-assisted generation of a homogeneous flux of ablated materials in front of a fluidized bed of host particles. The coated particulates have been characterized using scanning electron microscopy, energy dispersive x-ray analysis, Auger electron spectroscopy, and superconducting quantum interference device magnetometer. (C) 1998 American Institute of Physics.