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Effects of Gd substitution on magnetic, structural and superconducting properties of Bi_(1.7-x)Pb_(0.3)Gd_xSr_2Ca_2Cu_3O_y

机译:Gd取代对Bi_(1.7-x)Pb_(0.3)Gd_xSr_2Ca_2Cu_3O_y的磁性,结构和超导性能的影响

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摘要

The effects of Gd addition on the structural and magnetic properties of Bi_(1.7-x)Pb_(0.3)Gd_xSr_2Ca_2Cu_3O_y (x = 0.00-0.20) superconducting samples were investigated. The samples were prepared by conventional solid state reaction method. The phase formation, phase fraction and lattice parameters were determined from X-ray diffraction (XRD) measurements, while the microstructure, surface morphology analyses of the samples were carried out using scanning electron microscope. As Gd addition was increased, surface morphology and grain connectivity of the samples were observed to degrade. XRD results indicated that the lattice parameter c decrease with increasing Gd addition while Bi-2223 phase disappear and Bi-2212 phase become dominant. AC susceptibility measurements were performed at various ac fields (ranging from 20 to 160 A/m) to understand the effect of Gd addition on magnetic properties of Bi_(1.7-x)Pb_(0.3)Gd_xSr_2Ca_2Cu_3O_y superconductors. The results showed that both critical temperature (T_c) and critical current densities (J_c) were found to decrease with increasing Gd addition. It was found that T_c values decrease from 108 to 70 K with increasing Gd addition.
机译:研究了添加Gd对Bi_(1.7-x)Pb_(0.3)Gd_xSr_2Ca_2Cu_3O_y(x = 0.00-0.20)超导样品的结构和磁性的影响。通过常规的固态反应方法制备样品。通过X射线衍射(XRD)测量确定相形成,相分数和晶格参数,同时使用扫描电子显微镜进行样品的微观结构,表面形态分析。随着Gd添加量的增加,观察到样品的表面形态和晶粒连通性降低。 XRD结果表明,随着Gd添加量的增加,晶格参数c减小,而Bi-2223相消失,Bi-2212相占主导。在各个交流场(范围从20至160 A / m)进行交流磁化率测量,以了解Gd添加对Bi_(1.7-x)Pb_(0.3)Gd_xSr_2Ca_2Cu_3O_y超导体的磁性的影响。结果表明,临界温度(T_c)和临界电流密度(J_c)随添加Gd的增加而降低。发现随着Gd添加量的增加,T_c值从108K降低到70K。

著录项

  • 来源
    《Journal of materials science》 |2015年第3期|1700-1708|共9页
  • 作者

    Ozlem Bilgili; Kemal Kocabas;

  • 作者单位

    Department of Physics, Dokuz Eylul University, 35160 Buca Izmir, Turkey;

    Department of Physics, Dokuz Eylul University, 35160 Buca Izmir, Turkey;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

  • 入库时间 2022-08-17 13:45:20

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