Magnetic materials containing LaSr manganite phase

Ferromagnetic glass-crystalline materials were produced by sintering of glasses from the systems Bi2O3-B2O3-MnO and crystalline phase La0.6Sr0.4MnO3. The appropriate preparation procedure was applied as follows: synthesis of the starting components, mixing, milling, pressing and sintering at selected temperatures. The steps of the technological scheme were controlled by X-ray diffraction and infrared spectroscopy. Small crystals with size in the order of 1-5 mum were detected by transmission electron microscopy observations [TEM] after heath treatment. The magnetic properties were studied by a vibrating sample magnetometer [VSM] and the Curie temperature was detected at 353 K. The presence of a narrow hysteresis loop proves the ferromagnetic properties of the materials. (C) 2003 Elsevier SAS. All rights reserved.