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Abstrakt
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.
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Autorzy (12)
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Magnus H. Sorby Dr
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Maria Balaguer Dr
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José M Serra
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Ragnar Strandbakke Dr
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Pełna treść
- Wersja publikacji
- Accepted albo Published Version
- Licencja
- Copyright (2019 The American Ceramic Society)
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Informacje szczegółowe
- Kategoria:
- Publikacja w czasopiśmie
- Typ:
- artykuły w czasopismach
- Opublikowano w:
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JOURNAL OF THE AMERICAN CERAMIC SOCIETY
nr 103,
strony 1809 - 1818,
ISSN: 0002-7820 - Język:
- angielski
- Rok wydania:
- 2020
- Opis bibliograficzny:
- Szpunar I., Wachowski S. L., Miruszewski T., Dzierzgowski K., Górnicka K., Klimczuk T., Sorby M., Balaguer M., Serra J., Strandbakke R., Mielewczyk-Gryń A. D., Gazda M.: Electric and magnetic properties of Lanthanum Barium Cobaltite// JOURNAL OF THE AMERICAN CERAMIC SOCIETY -Vol. 103,iss. 3 (2020), s.1809-1818
- DOI:
- Cyfrowy identyfikator dokumentu elektronicznego (otwiera się w nowej karcie) 10.1111/jace.16865
- Weryfikacja:
- Politechnika Gdańska
wyświetlono 206 razy