About this Abstract |
| Meeting |
MS&T25: Materials Science & Technology
|
| Symposium
|
Processing and Performance of Materials Using Microwaves, Electric and Magnetic Fields, Ultrasound, Lasers, and Mechanical Work – Rustum Roy Symposium
|
| Presentation Title |
Detecting rare earth elements and critical transition metals via optically detected magnetic resonance (ODMR) and spin-relaxometry using nitrogen vacancy centers in nanodiamonds |
| Author(s) |
Ghadendra Bhandari, Gary Lander, Matthew M. Brister, Crawford E. Scott , Hari Paudel, Jeffrey Wuenschell, Michael P. Buric, Ruishu Wright, Yuhua Duan |
| On-Site Speaker (Planned) |
Ghadendra Bhandari |
| Abstract Scope |
Nanodiamonds with nitrogen-vacancy (NV) centers are emerging as powerful tools in quantum sensing due to their remarkable sensitivity to local variations in electromagnetic fields, temperature, and pressure. The magnetic properties of these point defects in the diamond lattice can be probed using optically detected magnetic resonance (ODMR) and spin relaxometry techniques. The sensing mechanism relies on laser-induced excitation of the NV center's non-degenerate triplet ground state, which promotes electrons to an excited state. Subsequent photoluminescence emission, which is spin-state dependent, is then measured. These spin states are highly responsive to magnetic perturbations from the surrounding. By analyzing changes in the ODMR spectra and spin relaxation times, we can effectively monitor how magnetic species influence the NV center's spin dynamics, thus enabling sensitive and selective characterization of nanoscale magnetic materials. These techniques have been applied for the characterization of critical transition metals and rare earth elements which show natural ferromagnetic properties. |