METHOD FOR INCREASING THE CURIE TEMPERATURE OF MAGNETORESISTIVE OXIDES HAVING A DOUBLE PEROVSKITE STRUCTURE

摘要

The invention relates to a method for increasing the ferromagnetic order temperature (Curie temperature, TC) of A2BB'O6 double perovskite-type ferromagnetic oxides, wherein B and B' are metal ions (B=Cr, Fe, Co, etc. and B'=Mo, Re, W, etc.). Some of said oxides are metal and ferromagnetic oxides and they have a high magnetoresistance (change in the electric resistance thereof when subjected to a magnetic field), enabling them to be used as magnetoresistive sensors and devices. The invention relates to A2BB'O6-type materials prepared with the composition and method described as well as the magnetoresistive devices (e.g. magnetic sensors, magnetic storage units, magnetic read heads, etc.) that can be produced in this way.