Thermal variation and dependence on Cu-layer thickness tCu (tCu = 7.6-25.7 Å) of magnetoresistance (MR) and the magnetization (M) of [Co(10.2 Å)/Cu(tCu)]25 magnetic multilayers (MMLs) have been measured between 4.2 and 300 K. So as long as the magnetization of adjacent Co layers are aligned antiparallel, the MR increases with decreasing temperature. This temperature dependence becomes weak as the antiparallel coupling weakens, and it is almost temperature-independent for samples with tCu where the magnetization is aligned parallel. The temperature dependence of MR for tCu = 11.4 Å, for which the coupling crosses over from antiparallel to parallel, is complex.
- Gaint magnetoresistance
- Spin-dependent scattering
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics