1. Superhyperfine interactions in inhomogeneously broadened paramagnetic centers observed via a hole-burned free induction decay
- Author
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Simon C. Drew, John R. Pilbrow, Douglas R. MacFarlane, and Peter J Newman
- Subjects
Condensed matter physics ,Chemistry ,Pulsed EPR ,General Physics and Astronomy ,Molecular physics ,law.invention ,Free induction decay ,Paramagnetism ,symbols.namesake ,Fourier transform ,law ,symbols ,Physical and Theoretical Chemistry ,Electron paramagnetic resonance ,Spectroscopy ,Hyperfine structure ,Excitation - Abstract
Superhyperfine interactions in inhomogeneously broadened paramagnetic centers are observed using a single high-turn-angle microwave pulse. The free induction signal that follows the hole-burning pulse exhibits oscillations that are distinct from the oscillatory free induction decay observable in some inhomogeneously broadened systems. It contains frequencies characteristic of the superhyperfine splittings, together with a zero frequency component. Experimental examples of the effect in both orientationally disordered (powdered) and structurally disordered (glassy) systems are presented and compared with the conceptually similar Fourier transform electron paramagnetic resonance detected nuclear magnetic resonance experiment, together with numerical simulations.
- Published
- 2003
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