Eur. Phys. J. B (2013) 86: 354
https://doi.org/10.1140/epjb/e2013-40544-x

Regular Article

Iterative deconvolution of quadrupole split NMR spectra

¹ Institute of Theoretical Physics, Ecole Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
² Institute for Solid State Physics, University of Tokyo, Kashiwa, 277-8581 Chiba, Japan

^a e-mail: frederic.mila@epfl.ch

Received: 4 June 2013
Received in final form: 3 July 2013
Published online: 7 August 2013

Abstract

We propose a simple method to deconvolute NMR spectra of quadrupolar nuclei in order to separate the distribution of local magnetic hyperfine field from the quadrupole splitting. It is based on an iterative procedure which allows to express the intensity of a single NMR line directly as a linear combination of the intensities of the total experimental spectrum at a few related frequencies. This procedure is argued to be an interesting complement to Fourier transformation since it can lead to a significant noise reduction in some frequency ranges. This is demonstrated in the case of the ¹¹B-NMR spectrum in SrCu₂(BO₃)₂ at a field of 31.7 T, where a magnetization plateau at 1/6 of the saturation has been observed.