Sensitivity of Nuclear Magnetic Double Resonance

Paul R. Spencer, H. Dankward Schmid, and Charles P. Slichter
Phys. Rev. B 1, 2989 – Published 1 April 1970
PDFExport Citation

Abstract

The dynamics of the nuclear magnetic double-resonance process for Na nuclei in a (2,0,0) position relative to a substitutional Ag+ impurity in NaCl has been studied for several Ag concentrations. The purpose was to determine experimentally the factors which limit the double-resonance sensitivity. For Ag concentrations below 0.03 mole%, the magnetization of unperturbed Na nuclei decayed exponentially with rates proportional to the impurity concentration when a rf field at the resonance frequency of the quadrupole-shifted transitions was applied. Using a method of intermittent search-field irradiation, evidence was found that the finite spin diffusion rate caused a double-resonance energy transfer rate under continuous search-field irradiation about 30% less than the transfer rate which would be observed if the spin diffusion were infinitely fast. A theoretical explanation of the results is given using a perturbation approach based on the concept of spin diffusion. In addition, we have studied the Na spin-lattice relaxation in the completely demagnetized state as a function of impurity concentration, and found a rapid initial decrease of spin order. This was caused by cross relaxation within the nuclear spin system.

  • Received 6 October 1969

DOI:https://doi.org/10.1103/PhysRevB.1.2989

©1970 American Physical Society

Authors & Affiliations

Paul R. Spencer*, H. Dankward Schmid, and Charles P. Slichter

  • Department of Physics and Materials Research Laboratory, University of Illinois, Urbana, Illinois 61801

  • *Present address: II Physikalisches Institut, Universitaet Stuttgart, Stuttgart, Germany.
  • Present address: III Physikalisches Institut, Universitaet Stuttgart, 7 Stuttgart, Germany.

References (Subscription Required)

Click to Expand
Issue

Vol. 1, Iss. 7 — 1 April 1970

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review B

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×