MANGANITE WITH COLOSSAL MAGNETORESISTANCE IN TEMPERATURE RANGE OF 190-300 K Russian patent published in 2017 - IPC C01F17/00 C01G45/00 C01F11/00 C01G9/00 C01G17/00 H01F1/01 C30B29/22 

FIELD: physics.

SUBSTANCE: polycrystalline material based on lanthanum-strontium manganite has the composition La_0.810Sr_0.190Mn_1-x(Zn_0.5Ge_0.5)_xO₃, where x takes values from 0.148 to 0.152. The material is made from a charge containing lanthanum oxide, carbonate strontium, manganese dioxide, zinc oxide, and germanium oxide. These components are mixed and spend primary grinding in a ball mill for 4 hours with subsequent heat treatment at a temperature of 1000°C for 4 hours. Secondary grinding in a ball mill is then carried out for 10 hours, moulding and sintering at a temperature of 1200°C for 10 hours. The resulting material has a positive effect on the colossal magnetoresistance achieved in the magnetic field up to 1 T and a gently varying in a wide temperature range from 190 K to 300 K.

EFFECT: invention allows to reduce the cost of manufacturing manganite, to expand the operating temperature range of the devices based on it, eliminating the need for heat sensitive items, to provide increased reliability and reliability of measurements.

1 dwg, 1 ex