Magnetic studies of Ta doping in Pr{sub 1.5}Ce{sub 0.5}Sr{sub 2}Cu{sub 2}NbO{sub 10}
- Department of Applied Science, University of California at Davis, Livermore, California 94550 (United States)
- Department of Physics, University of California at Davis, Davis, California 95616 (United States)
- Department of Physics, North Carolina Agricultural and Technical State University, Greensboro, North Carolina 27411 (United States)
The Pr{sub 1.5}Ce{sub 0.5}Sr{sub 2}Cu{sub 2}Nb{sub 1{minus}{ital x}}Ta{sub {ital x}}O{sub 10} (0{le}{ital x}{le}1) compounds display an in-plane weak ferromagnetic component similar to that observed in the Nd{sub 2}CuO{sub 4}-type {ital T}{prime} structure. Zero-field-cooled and field-cooled magnetization spectra indicate that the magnetic peak, previously ascribed by neutron diffraction in the Pr{sub 1.5}Ce{sub 0.5}Sr{sub 2}Cu{sub 2}NbO{sub 10} system as originating from an interlayer Cu spin reorientation, shifts towards lower temperature as the content of Ta increases. In addition, the effective Pr ion moment obtained by Curie-Weiss fits to the magnetization data taken at fields sufficiently high to saturate the weak ferromagnetic component indicate that the long-range antiferromagnetic ordering of the Pr ions in these compounds ({approximately}2.8{mu}{sub {ital B}}) is not affected by the substitution of Ta in for Nb. The nature of the complex magnetic behavior of these compounds originates from a thermal competition between magnetocrystalline anisotropy and magnetic exchange interactions. {copyright} {ital 1996 The American Physical Society.}
- Research Organization:
- Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 278713
- Journal Information:
- Physical Review, B: Condensed Matter, Vol. 53, Issue 5; Other Information: PBD: Feb 1996
- Country of Publication:
- United States
- Language:
- English
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