We present data related to the temperature (Formula presented) and angular (θ) dependencies of the upper critical field (Formula presented) of Nb(superconductor)-CuMn(spin glass) multilayers as a function of CuMn layer thickness and Mn concentration. We observe two-dimensional (2D) behavior for large CuMn thickness. As the CuMn layer thickness is decreased, the (Formula presented) curves correspond to three-dimensional (3D) behavior, while the (Formula presented) dependencies measured in the range (Formula presented) are more sensitive to the dimensionality of the system. In particular, the experimental data reveal a (Formula presented) crossover at very low angle when the Mn percentage is increased at fixed CuMn thickness. This behavior can be related to vortex dimensionality change in anisotropic superconductors.
|Original language||English (US)|
|Number of pages||5|
|Journal||Physical Review B - Condensed Matter and Materials Physics|
|State||Published - 1998|
ASJC Scopus subject areas
- Electronic, Optical and Magnetic Materials
- Condensed Matter Physics