EPR Application in the Study of K3H(SO4)2 Proton Conductor Doped with Mn2+ or VO2+ Ions |
| S. Waplak Institute of Molecular Physics, Polish Academy of Sciences, Smoluchowskiego 17/19, 60-179 Poznań, Poland |
| Received: July 4, 1994 |
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| The EPR of Mn2+- or VO2+-doped superprotonic conductor K3H(SO4)2 is studied in the 80-471 K temperature range. VO2+ EPR spectrum reveals diffusion induced merging of proton transferred superhyperfine structure above 380 K. Line width anomaly is observed in Mn2+ EPR spectrum which is attributed to the intrabond and interbond proton motions, these lead to high protonic conductivity. It is shown that paramagnetic centers namely of electronic spin greater than 1, with excess charge compensated by the protonic vacancy, are good probes to monitor the protonic conductivity on molecular level. |
| DOI: 10.12693/APhysPolA.86.939 PACS numbers: 61.50.-f, 76.30.-v |