Modification of the oxygen-isotope effect in high-temperature superconductors due to transition-metal doping
- Morris Research Inc., 1918 University Avenue, Berkeley, California 94704 (United States)
- Department of Material Science and Mineral Engineering, University of California, Berkeley, California 94708 (United States)
We have investigated the effect on the oxygen-isotope-effect parameter [alpha][sub 0] of transition-metal substitutions at the Cu sites in YBa[sub 2]Cu[sub 3]O[sub 7[minus][delta]] (Y 1:2:3), YBa[sub 2]Cu[sub 4]O[sub 8] (Y 1:2:4), and Bi[sub 2]Sr[sub 2]CaCu[sub 2]O[sub 8] compounds. The effects of the dopants are found to be quite diverse. In the case of Zn doping, [alpha][sub 0] remains small in both Y 1:2:3 and Y 1:2:4 although [ital T][sub [ital c]] is rapidly depressed. On the other hand, doping with Fe or Ni has quite different effects in Y 1:2:3 and in Y 1:2:4. Our results suggest that the modification of the isotope effect depends upon the location of the dopant (Cu-O chains versus planes).
- OSTI ID:
- 5945671
- Journal Information:
- Physical Review, B: Condensed Matter; (United States), Journal Name: Physical Review, B: Condensed Matter; (United States) Vol. 48:13; ISSN 0163-1829; ISSN PRBMDO
- Country of Publication:
- United States
- Language:
- English
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