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Cu-63,Cu-65 NQR study of Zn and Ni doped YBa2Cu2O3O7
- Issue Date
- Nov-2000
- Publisher
- ELSEVIER SCIENCE BV
- Citation
- PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS, v.341, pp 2123 - 2124
- Pages
- 2
- Journal Title
- PHYSICA C-SUPERCONDUCTIVITY AND ITS APPLICATIONS
- Volume
- 341
- Start Page
- 2123
- End Page
- 2124
- ISSN
- 0921-4534
1873-2143
- Abstract
- Cu-63,Cu-65 NQR measurements have been performed on Zn and Ni doped. YBCO (YBa2Cu3-xMxO7, M=Zn or Ni, x=0.0 similar to 0.09). Distinctive differences due to the nonmagnetic Zn and the magnetic Ni dopants substituted for copper are compared microscopically based on. the plane and the chain Cu-63,Cu-65 NQR data. Both spin-lattice and spin-spin relaxation rates decrease for Zn doped YBCO whereas they increase for Ni doped YBCO. From the isotopic ratio of Cu-63,Cu-65 spin-lattice relaxation rate, a dominant relaxation mechanism is determined as a function of concentration and discussed in conjunction with magnetic moments of the dopants.
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