Long-lived frequency shifts observed in a magnetic resonance force microscope experiment following microwave irradiation of a nitroxide spin probe
Abstract
We introduce a spin-modulation protocol for force-gradient detection of magnetic resonance that enables the real-time readout of longitudinal magnetization in an electron spin resonance experiment involving fast-relaxing spins. We applied this method to observe a prompt change in longitudinal magnetization following the microwave irradiation of a nitroxide-doped perdeuterated polystyrene film having an electron spin-lattice relaxation time of T1∼1ms. The protocol allowed us to discover a large, long-lived cantilever frequency shift. Based on its magnitude, lifetime, and field dependence, we tentatively attribute this persistent signal to deuteron spin magnetization created via transfer of polarization from nitroxide spins.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Apr 01, 2013
- Source ID
- 10.1063/1.4795018
Entities
People
- Eric W. Moore
- John A Marohn
- Jonilyn G. Longenecker
- Lei Chen
Organizations
- Army Research Office
- Cornell University
- National Science Foundation