Solid solutions (Ru,Nb)Sr2(Sm1.4Ce0.6)Cu2O10−δ: Synthesis, structure, and properties

被引：0
|
作者：
G. M. Kuz’micheva
I. E. Kostyleva
E. P. Khlybov
A. Zaleski
L. N. Bogacheva
机构：
[1] Lomonosov State Academy of Fine Chemical Technology,Vereshchagin Institute of High
[2] Russian Academy of Sciences,Pressure Physics
[3] Laboratory of High Magnetic Fields and Low Temperatures,Institute of Low Temperature and Structure Research
[4] Polish Academy of Sciences,undefined
来源：
Russian Journal of Inorganic Chemistry | 2007年 / 52卷
关键词：
Unit Cell Parameter; Superconducting Transition Temperature; Stoichiometric Mixture; Compact Sample; Batch Composition;
D O I：
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中图分类号：
学科分类号：
摘要：
Solid solutions of as-batch composition (Ru1−xNbx)Sr2(Sm1.4Ce0.6)Cu2O10−δ (the Ru,Nb)-1222 phase), where x = 0.0, 0.25, 0.50, 0.75, or 1.00, have been synthesized and characterized by X-ray diffraction. A correlation is proposed between the refined composition of the Ru-1222 and Nb-1222 phases and their structural features. With increasing oxygen concentration in the Ru-1222 phase, the superconducting transition temperature increases from Tc = 28 to Tc = 34 K. The composition and magnetic properties of the Ru-1222 phase are affected by the batch composition: unlike in Ru + RuO2 mixtures, the presence of ruthenium in the batch decreases the oxygen proportion and increases the magnetic ordering temperature Tm; the phase of as-batch composition NbSr2(Sm1.4Ce0.6)Cu2O10−δ is paramagnetic.
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页码：844 / 853
页数：9
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