Paleomagnetism Studies with Nitrogen-Vacancy Defect Centers in Diamond
Presented by Dr. Pauli Kehayias, postdoctoral researcher working with Dr. Ronald Walsworth, Harvard University
Nitrogen-vacancy (NV) color centers in diamond have generated much recent attention for magnetometry applications. NV centers work at ambient conditions and can be placed close to the diamond surface, allowing a small sample-sensor separation and high spatial resolution. I will discuss ongoing work on using ensembles of near-surface NVs for magnetic microscopy, where we image magnetic grains in rock samples for paleomagnetism studies. The micron-scale spatial resolution enables us to spatially distinguish between different ferromagnetic minerals and isolate high-coercivity magnetic inclusions from possible contamination. In addition to presenting continuing sensitivity and instrumentation improvements, I will describe ongoing paleomagnetism measurements, including constraining the magnetic field strength of the early Earth and assessing whether meteorite parent bodies had magnetic dynamo activity.
11:00 am, Thursday, March 23, 2017
Room 190, Physics & Astronomy
Northeast corner of Lomas and Yale, Albuquerque, New Mexico
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