Defect Thermodynamics of (La_<1-x>Sr_x)_2CuO_<4-δ> Superconducting Oxide
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概要
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The oxygen deficit δ of (La_<1-x>Sr_x)_2CuO_<4-δ> was determined as a function of oxygen partial pressure(P_<O_2>) at various temperatures. When the δ-log P_<O_2> curve at a specified temperature was chosen as the reference and the curves for other temperatures were shifted along the abscissa, all the data points were found to form a single smooth curve (master curve). A theoretical equation providing δ as functions of P_<O_2> and strontium content was derived by combining defect equilibrium, mass action law and site conservation condition. The calculated curve was found to be in good agreement with the master curve. The relationship between copper valence and strontium content at constant oxygen pressure and temperature was determined experimentally and compared with calculated values. Good agreement was found between them.
- 社団法人応用物理学会の論文
- 1990-12-20
著者
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Idemoto Y
Sci. Univ. Tokyo Chiba Jpn
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Idemoto Yasushi
Department Of Industrial Chemistry Faculty Of Science And Technology Science University Of Tokyo
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Fueki Kazuo
Department Of Industrial Chemisrty Faculty Of Science And Technology Science University Of Tokyo
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Fueki Kazuo
Department Of Industrial Chemistry Faculty Of Science And Technology Science University Of Tokyo
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IDEMOTO Yasushi
Department of Industrial and Engineering Chemistry, Faculty of Science and Technology, Tokyo University of Science
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