Formation of magnetic moments in the cuprate superconductor Hg0.8Cu0.2Ba2Ca2Cu3O8+δ below Tc seen by NQR H. Breitzke, I. Eremin, D. Manske, E.V. Antipov and K. Lüders Fachbereich Physik, Freie Universität Berlin, D-14195 Berlin, Germany Institut für Theoretische Physik, Freie Universität Berlin, D-14195 Berlin, Germany Physics Department, Kazan State University, 420008 Kazan, Russia Department ...

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Methods are described and demonstrated for detecting the coherent evolution of nuclear spin observables in zero magnetic field with the full sensitivity of high field NMR. The principle motivation is to provide a means of obtaining solid state spectra of the magnetic dipole and electric quadrupole interactions of disordered systems without the line broadening associated with random orientation ...

Direct NQR signals from the light nuclei H, B, N use to be weak; their detection is difficult. For these light nuclei nuclear quadrupole double resonance (DNQR) methods are preferable in which the sensitivity is enhanced due to the thermal contact of two spin-systems and indirect detection. The higher the initial magnetic field B0, the better is the DNQR sensitivity. Apart from this, the DNQR s...