J. Hinderer

Evidence fors-wave superconductivity in theβ-pyrochlore oxideRbOs2O6

We report the results of 87Rb NMR measurements on RbOs2O6, a new member of the family of the superconducting pyrochlore-type oxides with a critical temperature Tc = 6.4 K. In the normal state, the nuclear spin-lattice relaxation time T1 obeys the Korringa-type relation T1T = constant and the Knight shift is independent of temperature, indicating the absence of strong magnetic correlations. In the superconducting state, T1^{-1}(T) exhibits a tiny coherence enhancement just below Tc, and decreases exponentially with further decreasing temperatures. The value of the corresponding energy gap is close to that predicted by the conventional weak-coupling BCS theory. Our results indicate that RbOs2O6 is a conventional s-wave-type superconductor.

Localized versus itinerant magnetic moments in Na0.7CoO2

Based on experimental

Magnetic phase transition at 88 K in Na 0.5 Co O 2 revealed by Na 23 NMR investigations

^{59}\mathrm{Co}

Unconventional charge ordering in Na0.70CoO2 below 300 K

-NMR data in the temperature range between 0.1 and

NMR study of CeTe at low temperatures

300\phantom{\rule{0.3em}{0ex}}\mathrm{K}

NQR studies of CePd2In under hydrostatic pressure

, we address the problem of the character of the Co

NQR studies of CePd2InCePd2In under hydrostatic pressure

3d

Magnetic transition in Na0.5CoO2 at 88 K

-electron based magnetism in

NQR studies of under hydrostatic pressure

{\mathrm{Na}}_{0.7}\mathrm{Co}{\mathrm{O}}_{2}

Evidence for s-wave superconductivity in the beta-pyrochlore oxide RbOs2O6

. Temperature-dependent