Method for increasing the Curie temperature in magnetoresistive oxides with perovskite structure double.

摘要

Method for increasing the Curie temperature in magnetoresistive oxides with perovskite structure double.; This invention relates to a method for increasing the temperature of ferromagnetic order (Curie temperature, T_ {c}) in ferromagnetic double perovskite type oxides A_ {2} {6} BB'O_ where B and B 'are metal ions (B = Cr, Fe, Co, ... and B '= Mo, Re, W, ...). Some of these are metal oxides and ferromagnetic and exhibit a magnetoresistance (change its power when subjected to a magnetic field strength) important, thus can be used in devices and magnetoresistive sensors. The present invention includes materials A_ BB'O_ type {2} {6} prepared with the composition and method to be described and the magnetoresistive devices (e.g., magnetic sensors, magnetic memory, magnetic reading heads, etc.) based on them they could be manufactured.