PHASE-SEPARATION AND OXYGEN VARIATION IN PR-DOPED BI2SR2CACU2O8+DELTA

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	PHASE-SEPARATION AND OXYGEN VARIATION IN PR-DOPED BI2SR2CACU2O8+DELTA
	X. L. Chen; J. K. Liang; J. R. Min; J. Q. Li; G. H. Rao
	1994
发表期刊	Physical Review B
ISSN	0163-1829
卷号	50 期号:5 页码:3431-3434
摘要	The structural and electrical properties of Bi2Sr2Ca1-xPrxCu2O8+delta have been investigated as a function of x. Powder-x-ray-diffraction patterns indicate that this system forms a continuous solid solution. It is found that phase separation exists in this system. Two phases with different modulated periods appear as the Pr doping changes. At low doping levels, the short-period phase dominates, while at high doping levels the long-period phase dominates. The short-period phase and the long-period phase are thought to correspond to the poor-Pr- and rich-Pr-concentration phases, respectively. T(c) was found to increase slightly for x less-than-or-equal-to 0.1, decrease linearly for 0.1 less-than-or-equal-to x less-than-or-equal-to 0.4, then to be depressed rapidly for 0.4 less-than-or-equal-to x less-than-or-equal-to 0.5, and finally to disappear at x = 0.6. The valence of Pr was inferred to be close to +3 from the measurement of the oxygen content and the comparison with other rare-earth-doped Bi-2212 systems. The variation of T(c) was explained in terms of hole filling and phase separation.
部门归属	acad sinica,int ctr mat phys,shenyang 110015,peoples r china. natl lab supercond,beijing 100080,peoples r china.;chen, xl (reprint author), chinese acad sci,inst phys,beijing 100080,peoples r china
关键词	Normal-state Properties Magnetic-properties Solid-solutions X-ray Superconductivity Tc Bi2sr2ca1-xyxcu2oy Y1-xprxba2cu3o7 Substitution Dependence
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文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/38794
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	X. L. Chen,J. K. Liang,J. R. Min,et al. PHASE-SEPARATION AND OXYGEN VARIATION IN PR-DOPED BI2SR2CACU2O8+DELTA[J]. Physical Review B,1994,50(5):3431-3434.
APA	X. L. Chen,J. K. Liang,J. R. Min,J. Q. Li,&G. H. Rao.(1994).PHASE-SEPARATION AND OXYGEN VARIATION IN PR-DOPED BI2SR2CACU2O8+DELTA.Physical Review B,50(5),3431-3434.
MLA	X. L. Chen,et al."PHASE-SEPARATION AND OXYGEN VARIATION IN PR-DOPED BI2SR2CACU2O8+DELTA".Physical Review B 50.5(1994):3431-3434.