Long-lived frequency shifts observed in a magnetic resonance force microscope experiment following microwave irradiation of a nitroxide spin probe

Journal Article · Mon Apr 01 00:00:00 EDT 2013 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4795018· OSTI ID:22162827

Chen, Lei; Longenecker, Jonilyn G.; Moore, Eric W.; Marohn, John A. ^[1]

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1. Department of Chemistry and Chemical Biology, Cornell University, Ithaca, New York 14853-1301 (United States)

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 T{sub 1}{approx}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.

• OSTI ID: 22162827
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 13 Vol. 102; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
DETECTION
DEUTERONS
DOPED MATERIALS
ELECTRON SPIN RESONANCE
FILMS
IRRADIATION
LIFETIME
MAGNETIZATION
MICROSCOPES
MICROWAVE RADIATION
MODULATION
PARAMAGNETISM
PHYSICAL RADIATION EFFECTS
POLARIZATION
POLYSTYRENE
READOUT SYSTEMS
SPECTROSCOPY
SPIN
SPIN-LATTICE RELAXATION