caa a22 4500 445380381 CHVBK 20180317143015.0 cr unu---uuuuu 170323e20110401xx s 000 0 eng 10.1007/s10948-010-1113-1 doi (NATIONALLICENCE)springer-10.1007/s10948-010-1113-1 Local Structure Instability Across the Martensitic Transition inNb3Sn [Elektronische Daten] [M. Acosta-Alejandro, J. Lezama-Pacheco, R. Falconi, R. Escudero, J. MustredeLeón] We report x-ray absorption fine structure (XAFS) measurements at the Nb K-edge of a Nb3Sn single crystal, for temperatures across the martensitic structural transition temperature T m. The Fourier transform amplitude of the peak associated with the second neighbor Nb-Nb and Nb-Sn pairs exhibits hysteresis across the martensitic transition under cooling and heating the sample across the transition. In contrast no such behavior was found for the Nb-Nb nearest neighbor distribution. The observed hysteresis can be attributed to the second neighbor Nb-Nb pairs as only the Debye-Waller factor of these pairs exhibits such a behavior. These results are consistent with a first-order phase transition, which has been previously proposed, and which suggests the possibility of an inhomogeneous ground state similar to other high-temperature superconductors. Springer Science+Business Media, LLC, 2010 Martensitic transition nationallicence Local lattice distortion nationallicence First-order phase transition nationallicence Acosta-Alejandro M. Universidad Juárez Autónoma de Tabasco, 86690, Tabasco, Cunduacán, Mexico aut Lezama-Pacheco J. Stanford Synchrotron Radiation Lightsource, 2575 Sand Hill Road, 94025, Menlo Park, CA, USA aut Falconi R. Universidad Juárez Autónoma de Tabasco, 86690, Tabasco, Cunduacán, Mexico aut Escudero R. Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, A.P. 70-360, 04510, Mexico D.F., Mexico aut MustredeLeón J. Departamento de Física Aplicada, Cinvestav-Mérida, Carretera Antigua a Progreso Km. 6.5, A.P. 73, Mérida, 97310, Yucatan, Mexico aut Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/3(2011-04-01), 1219-1223 1557-1939 24:3<1219 2011 24 10948 https://doi.org/10.1007/s10948-010-1113-1 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10948-010-1113-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Acosta-Alejandro M. Universidad Juárez Autónoma de Tabasco, 86690, Tabasco, Cunduacán, Mexico aut NATIONALLICENCE 700 1- Lezama-Pacheco J. Stanford Synchrotron Radiation Lightsource, 2575 Sand Hill Road, 94025, Menlo Park, CA, USA aut NATIONALLICENCE 700 1- Falconi R. Universidad Juárez Autónoma de Tabasco, 86690, Tabasco, Cunduacán, Mexico aut NATIONALLICENCE 700 1- Escudero R. Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, A.P. 70-360, 04510, Mexico D.F., Mexico aut NATIONALLICENCE 700 1- MustredeLeón J. Departamento de Física Aplicada, Cinvestav-Mérida, Carretera Antigua a Progreso Km. 6.5, A.P. 73, Mérida, 97310, Yucatan, Mexico aut NATIONALLICENCE 773 0- Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/3(2011-04-01), 1219-1223 1557-1939 24:3<1219 2011 24 10948 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer