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Pulsed NMRON measurements on insulators

  • Nuclear Magnetic Resonance on Oriented Nuclei
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Abstract

Selective single and double quantum excitation pulsed NMRON has been utilized to obtain rotation patterns, free induction decays, and spin echoes in antiferromagnetic54Mn−MnCl2·4H2O and the quasi-2 dimensional ferromagnet54Mn−Mn(COOCH3)2·4H2O. The pulsed technique is well suited to observing fast spin-lattice relaxation and T1 values down to 100 ms have been measured in these systems. These short times may make magnetic insulators viable hosts for on-line experiments. The dependence on field and temperature of the54Mn spin-lattice relaxation time T1 has been investigated and a T1 minimum at high fields observed in both systems. A spin-spin relaxation time T2≈50 μs is measured in54Mn−MnCl2·4H2O. The observation of NMRON in the paramagnetic phase of MnCl2·4H2O allows the resonant frequencies in the antiferromagnetic and paramagnetic phases to be compared, yielding a value for the zero point spin deviation in the former phase.

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Authors and Affiliations

  1. Department of Physics, University of British Columbia, V6T 1Z1, Vancouver, BC, Canada

    M. Le Gros, A. Kotlicki & B. G. Turrell

Authors
  1. M. Le Gros
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  2. A. Kotlicki
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  3. B. G. Turrell
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Le Gros, M., Kotlicki, A. & Turrell, B.G. Pulsed NMRON measurements on insulators. Hyperfine Interact 75, 261–268 (1992). https://doi.org/10.1007/BF02398981

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