Detection of the Meissner Effect with a Diamond Magnetometer
arXiv:0911.2533 · doi:10.1088/1367-2630/13/2/025017
Abstract
We examine the possibility of probing superconductivity effects in metal nanoclusters via diamond magnetometry. Metal nanoclusters have been proposed as constitutive elements of high T superconducting nanostructured materials. Magnetometry based on the detection of spin-selective fluorescence of nitrogen-vacancy (NV) centers in diamond is capable of nanoscale spatial resolution and could be used as a tool for investigating the properties of single or multiple clusters interacting among each other or with a surface. We have carried out sensitivity estimates and experiments to understand how these magnetometers could be used in such a situation. We studied the behavior of the sensor as a function of temperature and detected the flux exclusion effect in a superconductor by monitoring the [111]-orientation fine structure spectrum in high-NV density diamond. Our results show that phase transitions can be ascertained in a bulk superconductor with this technique while the principal zero field splitting parameter () demonstrates a temperature dependence that may require compensation schemes.
References in corpus (3)
Cited by in corpus (30)
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