Böhmer, RolandGerhard, G.Drexler, F.Loidl, A.Ngai, K. L.Pannhorst, W.2008-06-112008-06-111993Böhmer, R.; Gerhard, G.; Drexler, F.; Loidl, A.; Ngai, K. L.; Pannhorst, W.: Single particle jumps and correlated ionic motions in glass ceramics. In Journal of Non-Crystalline Solids Nr. 2, Jg. 155(1993), S. 189-193, doi: 10.1016/0022-3093(93)91325-W.http://hdl.handle.net/2003/2550410.17877/DE290R-2843Using impedance spectroscopy, the ion transport in poorly Li-conducting aluminosilicate glass ceramics and their precursor glasses has been measured for temperatures 50 K < T < 550 K and covering a frequency range of more than 14 decades from 10 mHz up to 3 THz. In addition to the familiar cooperative ionic motion dominating at high temperatures, for the first time dielectric relaxation due to elementary hopping processes is observed well below room temperature.enElsevier53010.1016/0022-3093(93)91325-Warticle (journal)