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Title: Pr and Cu magnetism in (Pr{sub 1.5}Ce{sub 0.5})Sr{sub 2}Cu{sub 2}MO{sub 10{minus}{delta}} (M=Nb, Ta): Correlations with a suppression of superconductivity

Abstract

The magnetic properties of nonsuperconducting (Pr{sub 1.5}Ce{sub 0.5})Sr{sub 2}Cu{sub 2}MO{sub 10{minus}{delta}} with M=Nb, Ta are characterized with dc magnetization, specific-heat, and neutron-diffraction experiments. Data for (Pr{sub 1.5}Ce{sub 0.5})Sr{sub 2}Cu{sub 2}NbO{sub 10{minus}{delta}} reveal complex Cu magnetism marked by antiferromagnetic order below 200 K, spin structure transitions at 130 and 57 K, both collinear and noncollinear antiferromagnetic spin structures, and weak ferromagnetic behavior below 130 K. The data also indicate an anomalous ordering of the Pr spins near 10 K, a large linear contribution to the low-temperature specific heat, and a Pr 4f crystal-field ground state similar to that found in PrBa{sub 2}Cu{sub 3}O{sub 7}. Furthermore, there is evidence that the weak ferromagnetic behavior couples to the Pr ordering near 10 K. Identical Pr magnetism and similar Cu magnetism are found in (Pr{sub 1.5}Ce{sub 0.5})Sr{sub 2}Cu{sub 2}TaO{sub 10{minus}{delta}}, deoxygenated (Pr{sub 1.5}Ce{sub 0.5})Sr{sub 2}Cu{sub 2}NbO{sub 10{minus}{delta}}, and deoxygenated (Pr{sub 1.5}Ce{sub 0.5})Sr{sub 2}Cu{sub 2}TaO{sub 10{minus}{delta}}. These results indicate that superconductivity is suppressed in these compounds in the same phenomenological manner as in PrBa{sub 2}Cu{sub 3}O{sub 7}. We interpret this as evidence that superconductivity is suppressed by the same mechanism in both structures and propose that a general correlation exists between anomalous Pr magnetism andmore » a lack of superconductivity in these Pr-based high-T{sub C} cuprates. The significance of these results and analyses to understanding and modeling the suppression of superconductivity by Pr in high-T{sub C} cuprates is discussed. {copyright} {ital 1997} {ital The American Physical Society}« less

Authors:
;  [1];  [2]; ;  [3]
  1. Department of Physics, University of California, Davis, California 95616 (United States)
  2. Lawrence Livermore National Laboratory, Livermore, California 94550 (United States)
  3. Reactor Radiation Division, National Institute of Standards and Technology, Gaithersburg, Maryland 20899 (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
OSTI Identifier:
450380
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Journal Article
Journal Name:
Physical Review, B: Condensed Matter
Additional Journal Information:
Journal Volume: 55; Journal Issue: 5; Other Information: PBD: Feb 1997
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; SUPERCONDUCTIVITY; MAGNETIC PROPERTIES; PRASEODYMIUM COMPOUNDS; CERIUM COMPOUNDS; STRONTIUM COMPOUNDS; COPPER COMPOUNDS; NIOBIUM COMPOUNDS; TANTALUM COMPOUNDS; OXYGEN COMPOUNDS; MAGNETIC MOMENTS; PRASEODYMIUM OXIDES; CERIUM OXIDES; STRONTIUM OXIDES; COPPER OXIDES; NIOBIUM OXIDES; TANTALUM OXIDES; SPECIFIC HEAT; NEUTRON DIFFRACTION

Citation Formats

Goodwin, T J, Shelton, R N, Radousky, H B, Department of Physics, University of California, Davis, California 95616, Rosov, N, and Lynn, J W. Pr and Cu magnetism in (Pr{sub 1.5}Ce{sub 0.5})Sr{sub 2}Cu{sub 2}MO{sub 10{minus}{delta}} (M=Nb, Ta): Correlations with a suppression of superconductivity. United States: N. p., 1997. Web. doi:10.1103/PhysRevB.55.3297.
Goodwin, T J, Shelton, R N, Radousky, H B, Department of Physics, University of California, Davis, California 95616, Rosov, N, & Lynn, J W. Pr and Cu magnetism in (Pr{sub 1.5}Ce{sub 0.5})Sr{sub 2}Cu{sub 2}MO{sub 10{minus}{delta}} (M=Nb, Ta): Correlations with a suppression of superconductivity. United States. https://doi.org/10.1103/PhysRevB.55.3297
Goodwin, T J, Shelton, R N, Radousky, H B, Department of Physics, University of California, Davis, California 95616, Rosov, N, and Lynn, J W. Sat . "Pr and Cu magnetism in (Pr{sub 1.5}Ce{sub 0.5})Sr{sub 2}Cu{sub 2}MO{sub 10{minus}{delta}} (M=Nb, Ta): Correlations with a suppression of superconductivity". United States. https://doi.org/10.1103/PhysRevB.55.3297.
@article{osti_450380,
title = {Pr and Cu magnetism in (Pr{sub 1.5}Ce{sub 0.5})Sr{sub 2}Cu{sub 2}MO{sub 10{minus}{delta}} (M=Nb, Ta): Correlations with a suppression of superconductivity},
author = {Goodwin, T J and Shelton, R N and Radousky, H B and Department of Physics, University of California, Davis, California 95616 and Rosov, N and Lynn, J W},
abstractNote = {The magnetic properties of nonsuperconducting (Pr{sub 1.5}Ce{sub 0.5})Sr{sub 2}Cu{sub 2}MO{sub 10{minus}{delta}} with M=Nb, Ta are characterized with dc magnetization, specific-heat, and neutron-diffraction experiments. Data for (Pr{sub 1.5}Ce{sub 0.5})Sr{sub 2}Cu{sub 2}NbO{sub 10{minus}{delta}} reveal complex Cu magnetism marked by antiferromagnetic order below 200 K, spin structure transitions at 130 and 57 K, both collinear and noncollinear antiferromagnetic spin structures, and weak ferromagnetic behavior below 130 K. The data also indicate an anomalous ordering of the Pr spins near 10 K, a large linear contribution to the low-temperature specific heat, and a Pr 4f crystal-field ground state similar to that found in PrBa{sub 2}Cu{sub 3}O{sub 7}. Furthermore, there is evidence that the weak ferromagnetic behavior couples to the Pr ordering near 10 K. Identical Pr magnetism and similar Cu magnetism are found in (Pr{sub 1.5}Ce{sub 0.5})Sr{sub 2}Cu{sub 2}TaO{sub 10{minus}{delta}}, deoxygenated (Pr{sub 1.5}Ce{sub 0.5})Sr{sub 2}Cu{sub 2}NbO{sub 10{minus}{delta}}, and deoxygenated (Pr{sub 1.5}Ce{sub 0.5})Sr{sub 2}Cu{sub 2}TaO{sub 10{minus}{delta}}. These results indicate that superconductivity is suppressed in these compounds in the same phenomenological manner as in PrBa{sub 2}Cu{sub 3}O{sub 7}. We interpret this as evidence that superconductivity is suppressed by the same mechanism in both structures and propose that a general correlation exists between anomalous Pr magnetism and a lack of superconductivity in these Pr-based high-T{sub C} cuprates. The significance of these results and analyses to understanding and modeling the suppression of superconductivity by Pr in high-T{sub C} cuprates is discussed. {copyright} {ital 1997} {ital The American Physical Society}},
doi = {10.1103/PhysRevB.55.3297},
url = {https://www.osti.gov/biblio/450380}, journal = {Physical Review, B: Condensed Matter},
number = 5,
volume = 55,
place = {United States},
year = {1997},
month = {2}
}