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Ca掺杂对Y1-xCaxBa2Cu3O7-δ（0．05≤x≤0．20）薄膜超导电性的影响
  • ISSN号：1000-3258
  • 期刊名称：《低温物理学报》
  • 时间：0
  • 分类：O511.2[理学—低温物理;理学—物理]
  • 作者机构：[1]上海大学理学院,上海200444, [2]上海大学微结构重点实验室,上海200444
  • 相关基金：国家自然科学基金（批准号：10904088,11074163,50932003）资助课题.
作者： 余慧玲[1], 彭香连[1], 张金仓[1], 曹世勋[1], 鲁波[2], 冯振杰[1]
关键词： Y1-xCaxBa2Cu3O7-δ超导薄膜, 晶体结构, 磁化曲线, Y1-xCaxBa2Cu3O7-δ films, structure of crystal, magnetizing curve
中文摘要：

本文利用脉冲激光沉积法在（LaAlO3）0．3（Sr2AlTaO6）0.7（LSAT）的（001）面上外延生长了系列Y1-xCaxBa2Cu3O7-δ（0．05≤x≤0．20）超导薄膜．充分退火后的样品均为富氧材料，其X射线衍射（XRD）数据显示样品具有良好（001）取向，随着掺杂量z的增大，样品有由正交相变为四方相的趋势．低场下M～T测量数据显示超导态时样品具有抗磁性，随着Ca含量的增加超导转变温度（Tc）降低，当x=0．2时，仅有46K．当外加磁场达到10kOe时，磁化发生反转出现正值，表现为顺磁迈斯纳效应．

英文摘要：

A series of Y1-xCaxBa2Cu3O7-δ epitaxial superconductivity films with different Calcium doping are prepared by pulsed laser deposition （PLD） system on （001） direction of （LaAlO3）0.3 （Sr2AlTaO6）0.7 （LSAT） sub- strates. It is proved that the quality of the samples is good from the X-ray diffraction spectrum. The crystal struc-ture of the samples has the trend to change from orthogonal phase to tetragonal phase with the increasing of Ca sub- stitution. The diamagnetic signals are observed in low field magnetization measurements in all YCBCO samples and the superconducting transition temperature are depressed by Ca substitution, the of x=0. 2 sample was only 46K. The diamagnetic signals are observed changing to paramagnetic signals with magnetic field incredsing to 10kOe which is applied in a-b plane. This effect is called the paramagnetic Messner effect （PME）.

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期刊信息
  • 《低温物理学报》
  • 北大核心期刊（2011版）
  • 主管单位:中国科学院
  • 主办单位:中国科学技术大学
  • 主编：赵忠贤
  • 地址：安徽省合肥市金寨路96号
  • 邮编：230026
  • 邮箱：LiBiyou@ustc.edu.cn
  • 电话：0551-3601359
  • 国际标准刊号：ISSN：1000-3258
  • 国内统一刊号：ISSN：34-1053/O4
  • 邮发代号:26-136
  • 获奖情况:
  • 国内外数据库收录:
  • 美国化学文摘（网络版）,日本日本科学技术振兴机构数据库,中国中国科技核心期刊,中国北大核心期刊（2004版）,中国北大核心期刊（2008版）,中国北大核心期刊（2011版）,中国北大核心期刊（2014版）,中国北大核心期刊（2000版）
  • 被引量:1577