Media type: E-Article Title: Evidence for vortex surface pinning inYBa2Cu3O7−δfrom the frequency dependence of the complex penetration depth Contributor: Pautrat, Alain; Goupil, Christophe; Simon, Charles; Lütke-Entrup, Norbert; Plaçais, Bernard; Mathieu, Patrice; Simon, Yvan; Rykov, Alexander; Tajima, Setsuko imprint: American Physical Society (APS), 2001 Published in: Physical Review B Language: English DOI: 10.1103/physrevb.63.054503 ISSN: 0163-1829; 1095-3795 Origination: Footnote: