ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Resistivity and magnetization studies of [Ni83Fe17(27 Å)|Cu(37 Å)]10 multilayers, grown by electron-beam evaporation, reveal that the magnetoresistance (ΔR/R) increases from 〈0.3% to 4.4% following a heat treatment at 325 °C. Polarized neutron reflectivity measurements on annealed samples show that the interlayer coupling changes from ferromagnetic to antiferromagnetic, confirming the conclusions of the bulk studies. Data for the 300 and 325 °C annealed samples in small fields show a magnetic peak at half-order that is absent for the as-deposited and 275 °C annealed multilayers. Some of the Ni–Fe spins in the annealed multilayers are thus ordered in large (〉100 μm) in-plane domains aligned antiparallel across the Cu layers. An increase in the magnetic scattering at low angles indicates that some of the remaining Ni–Fe moments are randomly oriented from one layer to the next. © 1997 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.364745
