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期刊论文
Local electronic structure, O-T phase transition and oxygen content in Y0.8Ca0.2Ba2Cu3Oy (y=6.84-6.32) high-Tc superconductors
L. Li et al. Physica C 418 (2005) 43-48,-0001,():
Y0.8Ca0.2Ba2Cu3Oy samples with large range of oxygen content, have been systematically studied by means of positron annihilation technology, transport property measurements and X-ray diffraction. The positron lifetime parameters have a strong dependence on oxygen content y, and show evident changes during orthorhombic-tetragonal phase transition (y=6.50
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