Fractional quadrupole spin echo in the NMR of magnetically ordered materials
Abelyashev G. N. , Berzhanskii V. N. , Sergeev N. A., Fedotov Yu. V.
An additional spin echo signal from quadrupole nuclei with / = 3/2 (53Cr nuclei in CdCr2Se4) produced at the time t = 5/2т has been detected. The frequency dependence of the fractional echo amplitude is found to reflect only the quadrupole structure of the NMR spectrum.