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dc.creator Luz M. S. da
dc.creator Santos C. A. M. dos
dc.creator Machado A. J. S.
dc.creator Ferreira B.
dc.date 2002
dc.date.accessioned 2013-06-01T09:35:53Z
dc.date.available 2013-06-01T09:35:53Z
dc.date.issued 2013-06-01
dc.identifier http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332002000400012
dc.identifier http://www.doaj.org/doaj?func=openurl&genre=article&issn=01039733&date=2002&volume=32&issue=3&spage=744
dc.identifier.uri http://koha.mediu.edu.my:8181/jspui/handle/123456789/7874
dc.description This work presents a study of structural and magnetic properties of the Ba2Cu3O4Cl2 (Ba2342) compound. Doped samples with K or Sr in the Ba site and Zn or Mg in the Cu site of the Ba2342 were prepared using a solid state diffusion method. They were characterized by X-ray powder diffractometry, scanning electron microscopy and dc-magnetization. Samples with Ba2342 composition presented tetragonal structure of the I4/mmm space group when heat-treated at 750ºC. A structural transition was observed when the samples were doped with Zn or Mg or heat-treated at 700ºC. dc-Magnetization measurements performed in SQUID showed the existence of diamagnetic signal. A difference of the magnetic moments measured at zero field cooled (ZFC) and field-cooled (FC) procedures was observed suggesting the existence of localized superconductivity in this oxychloride system.
dc.publisher Sociedade Brasileira de Física
dc.source Brazilian Journal of Physics
dc.title Diamagnetism and structural transition in the Ba2Cu3O4Cl2 compound


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أعرض تسجيلة المادة بشكل مبسط