Anomalous Thermal Expansion in La_<2-x>Sr_xCuO_4
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概要
- 論文の詳細を見る
Lattice constants of La_<2-x>Sr_xCuO_4 (x=0.05, 0.10 and 0.15) are precisely determined as a function of temperature from 13 K to room temperature by Rietveld analysis using X-ray powder diffraction data. In La_<1.95>Sr_<0.05>CuO_4 and La_<1.90>Sr_<0.10>CuO_4, unit cell volumes show a small change below 50 K and 70 K, respectively. Anomalous volume change around T_c found in La_<1.85>Sr_<0,15>CuO_4 and La_<1.90>Sr_<0.10>CuO_4 cannot be explained only by superconductivity. The comparison between lattice constants in all samples is suggestive of the structural phase transition preceding the appearance of superconductivity.
- 社団法人応用物理学会の論文
- 1992-03-01
著者
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Ono Yasuhiro
Department Of Applied Chemistry Faculty Of Engineering & High Technology Research Center Kansai
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NARITA Shin-ya
Department of Applied Physics, Faculty of Engineering, Tohoku University
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Narita Shin-ya
Department Of Applied Physics Faculty Of Engineering Tohoku University
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