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Title: Complex magnetic properties of the rare-earth copper oxides, R sub 2 CuO sub 4 , observed via measurements of the dc and ac magnetization, EPR, microwave magnetoabsorption, and specific heat

Abstract

We report the results of an extensive investigation of the magnetic properties of a large series of undoped {ital R}{sub 2}CuO{sub 4} single crystals with {ital R}==Pr, Nd, Sm, Eu, and Gd (which are the host compounds for the newly discovered series of electron cuprate superconductors) and mixture versions of the form {ital A}{sub 2{minus}{ital x}}B{sub x}CuO{sub 4}, with {ital A}==Pr, Nd, Sm, Eu, or Gd, and {ital B}==Gd, Tb, or Dy. We have measured dc and ac magnetization, microwave magnetoabsorption, EPR, and specific heat. These measurements reveal two characteristic transition temperatures associated with a novel complex magnetic behavior, including weak ferromagnetism, two sharp peaks in the low-field dc magnetization, an unusual anisotropy in the EPR resonance field for {ital R}=Gd, and two additional anisotropic microwave absorption modes. The higher characteristic transition temeperature at {similar to}270 K is associated with antiferromagnetic ordering of the Cu moments which are strongly coupled within the CuO{sub 2} layers. The lower, at {le}20 K, cannot be attributed to antiferromagnetic ordering of the {ital R} moments and is tentatively attributed to a spontaneous canted spin reorientation. An understanding of this magnetic behavior is important in order to ascertain its relationship to possible mechanisms of high-temperaturemore » superconductivity.« less

Authors:
; ;  [1]; ;  [2]; ; ; ;  [3];  [4]
  1. San Diego State University, San Diego, California 92182 (US)
  2. University of California-San Diego, La Jolla, California 92093 (USA)
  3. Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (USA)
  4. Centro Atomico Bariloche 8400 Bariloche, Rio Negro, (Argentina)
Publication Date:
OSTI Identifier:
7172220
Resource Type:
Journal Article
Journal Name:
Physical Review, B: Condensed Matter; (USA)
Additional Journal Information:
Journal Volume: 41:4; Journal ID: ISSN 0163-1829
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; COPPER OXIDES; MAGNETIC PROPERTIES; RARE EARTH COMPOUNDS; ANISOTROPY; ANTIFERROMAGNETISM; CRITICAL TEMPERATURE; ELECTRON SPIN RESONANCE; FERROMAGNETISM; MAGNETIZATION; MONOCRYSTALS; SPECIFIC HEAT; CHALCOGENIDES; COPPER COMPOUNDS; CRYSTALS; MAGNETIC RESONANCE; MAGNETISM; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; RESONANCE; THERMODYNAMIC PROPERTIES; TRANSITION ELEMENT COMPOUNDS; TRANSITION TEMPERATURE; 360204* - Ceramics, Cermets, & Refractories- Physical Properties

Citation Formats

Oseroff, S B, Rao, D, Wright, F, Vier, D C, Schultz, S, Thompson, J D, Fisk, Z, Cheong, S, Hundley, M F, and Tovar, M. Complex magnetic properties of the rare-earth copper oxides, R sub 2 CuO sub 4 , observed via measurements of the dc and ac magnetization, EPR, microwave magnetoabsorption, and specific heat. United States: N. p., 1990. Web. doi:10.1103/PhysRevB.41.1934.
Oseroff, S B, Rao, D, Wright, F, Vier, D C, Schultz, S, Thompson, J D, Fisk, Z, Cheong, S, Hundley, M F, & Tovar, M. Complex magnetic properties of the rare-earth copper oxides, R sub 2 CuO sub 4 , observed via measurements of the dc and ac magnetization, EPR, microwave magnetoabsorption, and specific heat. United States. https://doi.org/10.1103/PhysRevB.41.1934
Oseroff, S B, Rao, D, Wright, F, Vier, D C, Schultz, S, Thompson, J D, Fisk, Z, Cheong, S, Hundley, M F, and Tovar, M. Thu . "Complex magnetic properties of the rare-earth copper oxides, R sub 2 CuO sub 4 , observed via measurements of the dc and ac magnetization, EPR, microwave magnetoabsorption, and specific heat". United States. https://doi.org/10.1103/PhysRevB.41.1934.
@article{osti_7172220,
title = {Complex magnetic properties of the rare-earth copper oxides, R sub 2 CuO sub 4 , observed via measurements of the dc and ac magnetization, EPR, microwave magnetoabsorption, and specific heat},
author = {Oseroff, S B and Rao, D and Wright, F and Vier, D C and Schultz, S and Thompson, J D and Fisk, Z and Cheong, S and Hundley, M F and Tovar, M},
abstractNote = {We report the results of an extensive investigation of the magnetic properties of a large series of undoped {ital R}{sub 2}CuO{sub 4} single crystals with {ital R}==Pr, Nd, Sm, Eu, and Gd (which are the host compounds for the newly discovered series of electron cuprate superconductors) and mixture versions of the form {ital A}{sub 2{minus}{ital x}}B{sub x}CuO{sub 4}, with {ital A}==Pr, Nd, Sm, Eu, or Gd, and {ital B}==Gd, Tb, or Dy. We have measured dc and ac magnetization, microwave magnetoabsorption, EPR, and specific heat. These measurements reveal two characteristic transition temperatures associated with a novel complex magnetic behavior, including weak ferromagnetism, two sharp peaks in the low-field dc magnetization, an unusual anisotropy in the EPR resonance field for {ital R}=Gd, and two additional anisotropic microwave absorption modes. The higher characteristic transition temeperature at {similar to}270 K is associated with antiferromagnetic ordering of the Cu moments which are strongly coupled within the CuO{sub 2} layers. The lower, at {le}20 K, cannot be attributed to antiferromagnetic ordering of the {ital R} moments and is tentatively attributed to a spontaneous canted spin reorientation. An understanding of this magnetic behavior is important in order to ascertain its relationship to possible mechanisms of high-temperature superconductivity.},
doi = {10.1103/PhysRevB.41.1934},
url = {https://www.osti.gov/biblio/7172220}, journal = {Physical Review, B: Condensed Matter; (USA)},
issn = {0163-1829},
number = ,
volume = 41:4,
place = {United States},
year = {1990},
month = {2}
}