Publications Repository - Gdańsk University of Technology

The cubic Ba0.5La0.5CoO3‐δ was synthesized using solid state reaction. The structural properties were determined by the simultaneous refinement of Synchrotron Powder X‐ray Diffraction and Neutron Powder Diffraction data. Iodometric titration was used to examine the oxygen stoichiometry and average cobalt oxidation state. Low‐temperature magnetic studies show soft ferromagnetic character of fully oxidized material, with θP = 198(3) K and μeff = 2.11(2) μB. Electric measurements show the thermally activated nature of conductivity at low temperatures, whereas, due to the variable oxidation and spin state of cobalt, a single charge transport mechanism cannot be distinguished. Around room temperature, a wide transition from thermally activated conductivity to semi‐metallic behavior is observed. Under the inert atmos-phere, the oxygen content lowers and the cation ordering takes place, leading to coex-istence of two, ordered and disordered, phases. As a result of this change, thermally activated conductivity is observed also at high temperatures in inert atmosphere.

Authors

• dr inż. Iga Szpunar link open in new tab ,
• dr inż. Sebastian Lech Wachowski link open in new tab ,
• dr inż. Tadeusz Miruszewski link open in new tab ,
• dr inż. Kacper Dzierzgowski link open in new tab ,
• dr inż. Karolina Górnicka link open in new tab ,
• prof. dr hab. inż. Tomasz Klimczuk link open in new tab ,
• Dr Magnus H. Sorby,
• Dr Maria Balaguer,
• José M Serra,
• Dr Ragnar Strandbakke,
• dr hab. inż. Aleksandra Dorota Mielewczyk-Gryń link open in new tab ,
• prof. dr hab. inż. Maria Gazda link open in new tab