Diamagnetism and Structural Transition in the Ba 2 Cu 3 O 4 Cl 2 Compound
نویسندگان
چکیده
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 di usion method. They were characterized by X-ray powder di ractometry, scanning electron microscopy and dc-magnetization. Samples with Ba2342 composition presented tetragonal structure of the I4/mmm space group when heat-treated at 750C. A structural transition was observed when the samples were doped with Zn or Mg or heat-treated at 700C. dc-Magnetization measurements performed in SQUID showed the existence of diamagnetic signal. A di erence of the magnetic moments measured at zero eld cooled (ZFC) and eld-cooled (FC) procedures was observed suggesting the existence of localized superconductivity in this oxychloride system.
منابع مشابه
Magnetic Model for Ba 2 Cu 3 O 4 Cl 2
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