A Faster Diamond MagnetometerOctober 1, 2018
The spin state of a diamond defect known as a nitrogen-vacancy (NV) center is highly sensitive to a magnetic field. As such, NV centers can be used as tiny magnetometers. However, sequential measurements are needed to detect each spatial component of a magnetic field, limiting the use of these devices. Now, Dr. Ronald Walsworth and colleagues from Harvard Center for Brain Science have created an NV-center magnetometer that simultaneously measures all three spatial components of a magnetic field. The new device is 4 times faster than existing diamond-defect magnetometers and can measure fields that are 2 times smaller in strength...
Read a synopsis by Christopher Crockett, "A Faster Diamond Magnetometer" in Physics, Sep 20, 2018, https://physics.aps.org/synopsis-for/10.1103/PhysRevApplied.10.034044, and a Harvard Gazette article by Peter Reuell, "New Tool Aids in Sensing Magnetic Fields,"Oct 11, 2018, https://news.harvard.edu/gazette/story/2018/10/new-tool-simultaneously-senses-magnetic-fields-in-various-directions/.
Also read the original research article: J. M. Schloss, J.F. Barry, M. J. Turner, and R. L. Walsworth, "Simultaneous Broadband Vector Magnetometry Using Solid-State Spins," Phys. Rev. Applied 10 (2018) DOI: 10.1103/PhysRevApplied.10.034044.