| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1803081 | Journal of Magnetism and Magnetic Materials | 2008 | 4 Pages |
Abstract
In this work we describe experimental results in which a DC SQUID (superconducting quantum interference device) is used as free induction decay detector. Measurements of a solid ammonium perchlorate (NH4ClO4) sample were performed, in zero field, at 4.2Â K. Unexpected magnetic moment oscillations were detected at 1.5Â kHz. The computation of the magnetic fields suggests that the proton nuclear magnetic resonance may explain the measured resonance, considering reorientation of the ammonium group by quantum tunneling of protons and a magnetic proton dipole-dipole intermolecular interaction model.
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Physical Sciences and Engineering
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Condensed Matter Physics
Authors
V. Montero, G. Cernicchiaro,