caa a22 4500 445382902 CHVBK 20180317143022.0 cr unu---uuuuu 170323e20110701xx s 000 0 eng 10.1007/s10948-010-0848-z doi (NATIONALLICENCE)springer-10.1007/s10948-010-0848-z Characterization of FeSe x Superconductor Prepared by Different Thermal Routes by Instrumented Indentation [Elektronische Daten] [Jorge Pimentel Júnior, Francisco Serbena, Alcione Jurelo] The present work reports on the characterization of granular FeSe x superconductor. Two groups of polycrystalline samples were produced by different thermal routes trough a conventional solid-state reaction. The pellets were characterized by scanning electron microscopy, X-ray diffraction and electrical-resistivity measurements. Also, the elastic modulus at room temperature was measured by instrumented indentation. From X-ray analysis, we observed the presence of the α-FeSe1−x , β-FeSe1−x and Fe7Se8 phases for one group of samples and only the β-FeSe1−x and Fe7Se8 phases for another group, besides some minority phases. These results agree with resistivity measurements in which it was observed that for the first group of samples, where α-FeSe1−x is present, the superconductor behavior is noticed to have T C∼8 K, while the other group does not show superconductivity. Elastic modulus for both samples indicated values around 42 GPa at the deepest tip penetration depth. The E/H ratio for these samples is in between those of metals and brittle materials. Springer Science+Business Media, LLC, 2010 FeSe nationallicence Iron-based superconductor nationallicence Polycrystalline nationallicence Characterization nationallicence Hardness nationallicence Elastic modulus nationallicence Instrumented indentation nationallicence Pimentel Júnior Jorge Instituto de Física, Universidade Federal do Rio Grande do Sul, Caixa Postal 15.051, 91.501-970, Porto Alegre, Rio Grande do Sul, Brazil aut Serbena Francisco Departamento de Física, Universidade Estadual de Ponta Grossa, Av. Gen. Carlos Cavalcanti 4748, 84.030-000, Ponta Grossa, Paraná, Brazil aut Jurelo Alcione Departamento de Física, Universidade Estadual de Ponta Grossa, Av. Gen. Carlos Cavalcanti 4748, 84.030-000, Ponta Grossa, Paraná, Brazil aut Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/5(2011-07-01), 1437-1441 1557-1939 24:5<1437 2011 24 10948 https://doi.org/10.1007/s10948-010-0848-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10948-010-0848-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Pimentel Júnior Jorge Instituto de Física, Universidade Federal do Rio Grande do Sul, Caixa Postal 15.051, 91.501-970, Porto Alegre, Rio Grande do Sul, Brazil aut NATIONALLICENCE 700 1- Serbena Francisco Departamento de Física, Universidade Estadual de Ponta Grossa, Av. Gen. Carlos Cavalcanti 4748, 84.030-000, Ponta Grossa, Paraná, Brazil aut NATIONALLICENCE 700 1- Jurelo Alcione Departamento de Física, Universidade Estadual de Ponta Grossa, Av. Gen. Carlos Cavalcanti 4748, 84.030-000, Ponta Grossa, Paraná, Brazil aut NATIONALLICENCE 773 0- Journal of Superconductivity and Novel Magnetism Springer US; http://www.springer-ny.com 24/5(2011-07-01), 1437-1441 1557-1939 24:5<1437 2011 24 10948 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer