Effect of Pressure on the Giant Magnetoresistance for Co/Cu with Different Cu-Layer Thicknesses

Abstract

Effects of pressure on the giant magnetoresistance (GMR) at various temperatures are studied for [Co(10.8Å)/Cu(t_CuÅ)]₁₅ magnetic multilayers (MMLs) with t_Cu near the first peak (t_Cu≈10)of MR ratio. A significant difference is found that the pressure effect on the magnitude of MR ratio of Co/Cu for t_Cu=9.8 decreases with increasing pressure, while that for t_Cu= 11.7 increases. This enhancement of GMR in Co/Cu with t_Cu=11.7 caused by applying pressure, at 5 K, 77 K and room temperature, is the first observation in Co/Cu MMLs.