Compound magnetoresistance effect materials and method for making the same

摘要

A compound magnetoresistance effect material which is an oxide containing thallium(Tl) and manganese(Mn); wherein the oxide has a composition of Tl2Mn2Oy where y represents seven or a value near to seven which varies depending on a combination of components of the oxide, a composition ratio between the components and conditions in synthesis of the oxide and has a pyrochlore structure.