Graphical programming for pulse automated NMR experiments

We describe a software program designed to control a broadband pulse nuclear magnetic resonance (NMR) spectrometer used in zero-field NMR studies of magnetic metals. The software is written in the graphical language Labview. This type of programming allows modifications and the inclusion of new routines to be carried out easily by the non-specialist, without changing the basic structure of the program. The program corrects for differences in the gain of the two acquisition channels (U (phase) and V (quadrature)), and automatic baseline subtraction. We present examples of measurements of NMR spectra, spin-echo decay (T-2), and quadrupolar oscillations, performed in magnetic intermetallic compounds.