In recent experiments on triplet superconductivity in full film CrO2-based triplet spin valves a surprisingly large proximity effect was shown under an out-of-plane magnet field by Singh et al. We...Show moreIn recent experiments on triplet superconductivity in full film CrO2-based triplet spin valves a surprisingly large proximity effect was shown under an out-of-plane magnet field by Singh et al. We aim to investigated this further with improved control over the current paths and magnetic non-collinearity in a new configuration. This is done by using more confined structures rather than a full film and by applying an in-plane field. We find that more control is needed over the magnetic non-collinearity required for triplet generation in in-plane experiments. A further improved design based on shape anisotropy is proposed to achieve this. Out-of-plane field measurements find a proximity effect coinciding in order of magnitude with the previously published results.Show less
Triplet superconductivity in lateral Josephson junctions has only been shown in the ferromagnet CrO2. We succeeded in creating a disk-shaped lateral cobalt Josephson junction with a trench width...Show moreTriplet superconductivity in lateral Josephson junctions has only been shown in the ferromagnet CrO2. We succeeded in creating a disk-shaped lateral cobalt Josephson junction with a trench width below 20 nm. The device shows promising signs of superconducting triplet correlations. For exchange fields up to 15 mT we see an increase in the critical current, possibly caused by an increase of the magnetic non-collinearity as the Ni generating layer aligns with the field. We also observe oscillations in the critical current. These oscillations have a period of approximately 4 mT and are believed to be the result of a flux quantisation effect in the superconducting cobalt disk.Show less
