3 years ago

$1/f$ flux noise in low-${T}_{c}$ SQUIDs due to superparamagnetic phase transitions in defect clusters

$1/f$ flux noise in low-${T}_{c}$ SQUIDs due to superparamagnetic phase transitions in defect clusters
Amrit De
It is shown here that $1/{f}^{α}$ flux noise in conventional low-${T}_{c}$ SQUIDs is a result of low temperature superparamagnetic phase transitions in small clusters of strongly correlated color center defects. The spins in each cluster interact via long-range ferromagnetic interactions. Due to its...

Publisher URL: http://link.aps.org/doi/10.1103/PhysRevB.99.024305

Open URL: http://arxiv.org/pdf/1710.09114

DOI: 10.1103/PhysRevB.99.024305

Open access
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