Strategies for solid-state NMR in high-field Bitter and hybrid magnets

Strategies for successful solid-state NMR experiments in high-field Bitter and hybrid magnets are discussed and implemented on an older generation 24 T system. In general, the stability and homogeneity of this type of magnets do not meet the requirements for most NMR experiments. Nevertheless, we wi...

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Bibliographic Details
Published in:Chemical physics letters 2003-07, Vol.376 (3), p.338-345
Main Authors: van Bentum, P.J.M, Maan, J.C, van Os, J.W.M, Kentgens, A.P.M
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Exact sciences and technology
Magnetic resonances and relaxations in condensed matter, mössbauer effect
Nuclear magnetic resonance and relaxation
Physics
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Summary:Strategies for successful solid-state NMR experiments in high-field Bitter and hybrid magnets are discussed and implemented on an older generation 24 T system. In general, the stability and homogeneity of this type of magnets do not meet the requirements for most NMR experiments. Nevertheless, we will show that a new type of shimming with ferromagnetic inserts, combined with feedback control of the power-supply and NMR reference deconvolution can be used to obtain well-resolved solid-state NMR spectra. We will demonstrate that this approach is especially useful for the study of half-integer quadrupolar nuclei. Experimental results include static and Magic Angle Spinning (MAS) 27Al NMR spectra of the minerals sillimanite and andalusite.
ISSN:0009-2614
1873-4448
DOI:10.1016/S0009-2614(03)01014-5