MAGNETIC DEVICE, MAGNETIC MEMORY DEVICE, MAGNETIC REGISTER EFFECT HEAD AND MAGNETIC STORAGE SYSTEM

摘要

PURPOSE: A magnetic device is provided to have a large magnetic-resister variation rate in a less magnetic field, and to be no variation of a resister and a sensitivity for a magnetic field. CONSTITUTION: In a magnetic device, a ferromagnetic-dielectric mixture layer(3) has a ferromagnetic material and a dielectric material. A first and a second tunnel dielectric barriers(2,4) are formed on the ferromagnetic-dielectric mixture layer, respectively. A first layer(1) of a ferromagnetic material is formed so that the first dielectric barrier exists between the ferromagnetic-dielectric mixture layer and the first layer of the ferromagnetic material. A second layer(5) of a ferromagnetic material is formed on the second dielectric barrier so that a current between the first layer and the second layer flows through the first and second dielectric tunnel barriers and through the ferromagnetic-dielectric mixture layer. A volume of the ferromagnetic material in the ferromagnetic-dielectric mixture layer is larger than that of the dielectric material in the ferromagnetic-dielectric mixture layer.