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Local Structure in Pure and Substitute Thin Films of High Tc Superconductors: an EXAFS Study

Local Structure in Pure and Substitute Thin Films of High Tc Superconductors: an EXAFS Study
高温超导体纯薄膜和替代薄膜的局域结构:一项 EXAFS 研究
批准号:
9205204
负责人:
Frank Bridges
金额:
$19.65万
依托单位国家:
美国
项目类别:
Continuing Grant
财政年份:
1992
资助国家:
美国
项目状态:
已结题
起止时间:
1992-09-01 至 1996-08-31

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中文摘要
翻译
YBa_2Cu_3O_7(YBCO)和(La)薄膜的局域结构 Sr)2CuO 4超导体将使用一系列 EXAFS实验。研究了c轴Cu(1)-O(4)和C轴Cu(1)-O(4)的行为。 Cu(2)-O(4)键,因为O被移除并重新引入相同的 样品通过退火将被测量,以确定如何 非谐性随Tc变化。将研究替代样本 了解当地的结构和网站,Jc, 准粒子寿命取决于不同的掺杂剂。这将是 用c轴和a轴膜澄清。更稀的浓度 的Fe,Cu,Ni和Zn在块体YBCO将被调查作为低 浓度制度对于控制或限制 准粒子寿命
英文摘要
The local structure in thin films of YBa2Cu3O7 (YBCO) and (La Sr)2CuO4 superconductors will be investigated using a series of EXAFS experiments. The behavior of the c-axis Cu(1)-O(4) and the Cu(2)-O(4) bonds as O is removed and reintroduced in the same sample via anneals will be measured to determine how the anharmonicity changes with Tc. Substituted samples will be studied to understand how the local structure and site, Jc, and quasiparticle lifetimes depend on different dopants. This will be clarified with c-axis and a-axis films. More dilute concentrations of Fe, Cu, Ni and Zn in bulk YBCO will be investigated as the low concentration regime may be important for controlling or limiting the quasiparticle lifetime.
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Important Correlations Between Local Structure and Thermoelectric Properties
  • 批准号:
    1005568
  • 项目类别:
    Continuing Grant
  • 资助金额:
    $48.0万
  • 财政年份:
    2010
  • 负责人:
    Frank Bridges
  • 依托单位:
Spin-Charge-Lattice Couplings in the Mn Oxide Systems
  • 批准号:
    0301971
  • 项目类别:
    Continuing Grant
  • 资助金额:
    $33.0万
  • 财政年份:
    2003
  • 负责人:
    Frank Bridges
  • 依托单位:
Novel Vibrational Modes and Thermal Properties in Systems with Large, Open Unit Cells
  • 批准号:
    0071863
  • 项目类别:
    Continuing Grant
  • 资助金额:
    $30.0万
  • 财政年份:
    2000
  • 负责人:
    Frank Bridges
  • 依托单位:
Polaron-Induced Local Distortions in Correlated Electron Systems
  • 批准号:
    9705117
  • 项目类别:
    Continuing Grant
  • 资助金额:
    $24.5万
  • 财政年份:
    1997
  • 负责人:
    Frank Bridges
  • 依托单位:
海外基金