Properties of some perovskites synthesized under pressure

Abstract

Interstitial solid solutions with the perovskite -like structurc wort: synt hesi;.ecl by solid phase reactions a t high prcssure and temperature. The S J nthesis conditions of single phased samples, their stability on heating in air werP detcrinined. The iiiagiietic and electrical properties were measured. ExpcrirnentalPolycrystalline samples were synthesized under 5 GPa in the temperature range from 700 to 1400 "C. The heater was made of graphite and t o avoid interaction with it the samples were contained in nickel or tantalum capsules. X-ray studies were performed with a DRON-3 diffractometer with Fe-Ka-radiation. The magnetization of the samples was measured on a vibrational magnetometer, the dynamical susceptibility -by a mutualinductance bridge and the electrical conductivity by the four-probe method.