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首页> 外文期刊>Materials Research Bulletin >Properties Of Superconducting, Polycrystalline Dysprosium-doped Bi_(1.6)pb_(0.5)sr_(2-x)dy_xca_(1.1)cu_(2.1)o_(8+δ) (0 ≤ X ≤ 0.5)
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Properties Of Superconducting, Polycrystalline Dysprosium-doped Bi_(1.6)pb_(0.5)sr_(2-x)dy_xca_(1.1)cu_(2.1)o_(8+δ) (0 ≤ X ≤ 0.5)

机译：超导多晶Dy掺杂Bi_（1.6）pb_（0.5）sr_（2-x）dy_xca_（1.1）cu_（2.1）o_（8 +δ）的性质（0≤X≤0.5）

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摘要

The structural and superconducting properties of dysprosium (Dy) doped (Bi,Pb)-2212 superconductor have been studied. Dy concentration is varied from x = 0.0 to 0.5 in a general stoichiometry of Bi_(1.6)Pb_(0.5)Sr_(2-x)Dy_xCa_(1.1)Cu_(2.1)O_(8+δ). It is found that the Dy atoms enter into the crystal structure by replacing Sr atoms and induce significant change in lattice parameter, microstructure, hole-concentration and normal state conductivity of the system. The critical temperature (T_c) and critical current density (J_c) at self-field of the Dy-doped samples enhance considerably at optimum doping levels. Maximum T_c of 92.3 K (forx = 0.4) and J_c of 1390 A/cm~2 at 64 K(for x = 0.2) are observed for doped samples as against 79.4 K and 127 A/cm~2, respectively, for the pure sample. The results are discussed on the basis of the change in hole-concentration due to Dy-doping at Sr-site of (Bi,Pb)-2212 superconductor.
机译：研究了掺D（Bi，Pb）-2212超导体的结构和超导性能。在Bi_（1.6）Pb_（0.5）Sr_（2-x）Dy_xCa_（1.1）Cu_（2.1）O_（8 +δ）的一般化学计量中，Dy浓度从x = 0.0到0.5变化。发现Dy原子通过取代Sr原子进入晶体结构，并引起体系晶格参数，微观结构，空穴浓度和常态电导率的显着变化。在最佳掺杂水平下，掺Dy样品的自电场的临界温度（T_c）和临界电流密度（J_c）大大提高。掺杂样品的最大T_c为92.3 K（forx = 0.4），J_c为1390 A / cm〜2（64 x（对于x = 0.2）），而纯样品分别为79.4 K和127 A / cm〜2样品。根据（Bi，Pb）-2212超导体的Sr部位的Dy掺杂引起的空穴浓度变化，对结果进行了讨论。

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