Normal-state 63Cu Knight shift and hole-band modification in Y1−xPrxBa2Cu3O7
Reyes, A. P. ; MacLaughlin, D. E. ; Takigawa, M. ; Hammel, P. C. ; Heffner, R. H. ; Thompson, J. D. ; Crow, J. E. ; Kebede, A. ; Mihalisin, T. ; Schwegler, J.
[S.l.] : American Institute of Physics (AIP)
Published 1990
[S.l.] : American Institute of Physics (AIP)
Published 1990
| ISSN: |
1089-7550
|
|---|---|
| Source: |
AIP Digital Archive
|
| Topics: |
Physics
|
| Notes: |
The 63Cu NMR Knight shift K has been measured in oriented powder samples of normal-state Y1−xPrxBa2Cu3O7, x=0.2 and 0.4. At plane Cu sites K is found to decrease with Pr doping, and a temperature dependence (dK/dT〉0) develops. The variation of K with bulk susceptibility χ is considerably greater than can be explained using RKKY coupling between Pr spins and Cu nuclei, and the temperature variation of K resembles that of χ in high-Tc systems with reduced conduction-hole concentration. These results are consistent with the view that Pr impurities significantly modify conduction-band properties, rather than acting as a "conventional'' pair-breaking mechanism.
|
| Type of Medium: |
Electronic Resource
|
| URL: |