Electron spin resonance of Eu2+ in the Eu doped clathrate Ba6Ge25 J. Sichelschmidt, W. Carrillo-Cabrera, V. A. Ivanshin, Yu. Grin and F. Steglich Eur. Phys. J. B, 46 2 (2005) 201-205 Published online: 11 August 2005 DOI: 10.1140/epjb/e2005-00246-8