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Magnetic pair-breaking effects: Moment formation and critical doping level in superconducting La sub 1. 85 Sr sub 0. 15 Cu sub 1 minus x A sub x O sub 4 systems ( A =Fe,Co,Ni,Zn,Ga,Al)

Journal Article · · Physical Review, B: Condensed Matter; (USA)
 [1];  [2]; ;  [3]
  1. Department of Physics and Astronomy, Brown University, Providence, RI (USA)
  2. Department of Physics and Astronomy, The Johns Hopkins University, Baltimore, MD (USA) Institute of Physics, Polish Academy of Sciences, 02668 Warsaw (Poland)
  3. Department of Physics, The Johns Hopkins University, Baltimore, MD (USA)

We have conducted a systematic study on the effect of Cu-site doping in La{sub 1.85}Sr{sub 0.15}CuO{sub 4} system. The relations between {Tc} and doping level as well as the critical doping levels {ital x}{sub {ital c}} have been determined accurately for the Fe-, Co-, Ni-, Zn-, Ga-, and Al-doped systems. Every dopant either carries an intrinsic magnetic moment or induces a net moment on the Cu-O{sub 2} plane. The size of the moment is correlated with the suppression of superconductivity, consistent with the magnetic-pair-breaking effect. The ground states of the dopants have also been determined.

OSTI ID:
6362124
Journal Information:
Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 42:13; ISSN PRBMD; ISSN 0163-1829
Country of Publication:
United States
Language:
English