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Title: Field-dependent antiferromagnetism and ferromagnetism of the two copper sublattices in Sr{sub 2}Cu{sub 3}O{sub 4}Cl{sub 2}

Abstract

The Cu{sub 3}O{sub 4} layer in Sr{sub 2}Cu{sub 3}O{sub 4}Cl{sub 2} is a variant of the square CuO{sub 2} lattice of the high-temperature superconductors, in which the center of every second plaquette contains an extra Cu{sup 2+} ion. The ions that make up the conventional CuO{sub 2} network, called CuI, have CuI-CuI exchange energy {approx}130thinspmeV, and order antiferromagnetically at about 380 K; the CuII-CuII exchange is only {approx}10thinspmeV, and the CuII{close_quote}s order at {approx}40thinspK. A study is reported here of the dependence of the magnetization on field, temperature, and crystallographic orientation for this interesting system. We show that the small permanent ferromagnetic moment, that appears when the CuI spins order, and the unusual spin rotation transitions seen most clearly for one particular direction of the magnetic field, are the result of several small bond-dependent anisotropic terms in the spin Hamiltonian that are revealed because of the frustration of the isotropic Heisenberg interaction between CuI and CuII spins. These include a term which favors collinearity of the CuI and CuII spins, which originates from quantum fluctuations, and also the pseudodipolar interaction. Some of these small interactions also come into play in other lamellar cuprates, connected with the high-T{sub c} superconductivity materials,more » and in many spin-chain and spin-ladder compounds. {copyright} {ital 1999} {ital The American Physical Society}« less

Authors:
 [1];  [1]; ;  [1];  [2];  [1];  [3]; ; ;  [1];  [4]
  1. Center of Materials Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139 (United States)
  2. School of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978 (Israel)
  3. Department of Physics, University of Pennsylvania, Philadelphia, Pennsylvania 19104 (United States)
  4. Department of Physics, Brookhaven National Laboratory, Upton, New York 11973 (United States)
Publication Date:
OSTI Identifier:
345427
Resource Type:
Journal Article
Journal Name:
Physical Review, B: Condensed Matter
Additional Journal Information:
Journal Volume: 59; Journal Issue: 22; Other Information: PBD: Jun 1999
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; STRONTIUM COMPOUNDS; COPPER COMPOUNDS; ANTIFERROMAGNETIC MATERIALS; ANTIFERROMAGNETISM; STRONTIUM OXIDES; HIGH-TC SUPERCONDUCTORS; COPPER OXIDES; CHLORINE OXIDES; SPIN; MAGNETIC MOMENTS; COPPER IONS; COPPER; HEISENBERG MODEL; EXCHANGE INTERACTIONS

Citation Formats

Kastner, M A, Aharony, A, School of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Birgeneau, R J, Chou, F C, Entin-Wohlman, O, Greven, M, Harris, A B, Kim, Y J, Lee, Y S, Parks, M E, and Zhu, Q. Field-dependent antiferromagnetism and ferromagnetism of the two copper sublattices in Sr{sub 2}Cu{sub 3}O{sub 4}Cl{sub 2}. United States: N. p., 1999. Web. doi:10.1103/PhysRevB.59.14702.
Kastner, M A, Aharony, A, School of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Birgeneau, R J, Chou, F C, Entin-Wohlman, O, Greven, M, Harris, A B, Kim, Y J, Lee, Y S, Parks, M E, & Zhu, Q. Field-dependent antiferromagnetism and ferromagnetism of the two copper sublattices in Sr{sub 2}Cu{sub 3}O{sub 4}Cl{sub 2}. United States. https://doi.org/10.1103/PhysRevB.59.14702
Kastner, M A, Aharony, A, School of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978, Birgeneau, R J, Chou, F C, Entin-Wohlman, O, Greven, M, Harris, A B, Kim, Y J, Lee, Y S, Parks, M E, and Zhu, Q. Tue . "Field-dependent antiferromagnetism and ferromagnetism of the two copper sublattices in Sr{sub 2}Cu{sub 3}O{sub 4}Cl{sub 2}". United States. https://doi.org/10.1103/PhysRevB.59.14702.
@article{osti_345427,
title = {Field-dependent antiferromagnetism and ferromagnetism of the two copper sublattices in Sr{sub 2}Cu{sub 3}O{sub 4}Cl{sub 2}},
author = {Kastner, M A and Aharony, A and School of Physics and Astronomy, Raymond and Beverly Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv 69978 and Birgeneau, R J and Chou, F C and Entin-Wohlman, O and Greven, M and Harris, A B and Kim, Y J and Lee, Y S and Parks, M E and Zhu, Q},
abstractNote = {The Cu{sub 3}O{sub 4} layer in Sr{sub 2}Cu{sub 3}O{sub 4}Cl{sub 2} is a variant of the square CuO{sub 2} lattice of the high-temperature superconductors, in which the center of every second plaquette contains an extra Cu{sup 2+} ion. The ions that make up the conventional CuO{sub 2} network, called CuI, have CuI-CuI exchange energy {approx}130thinspmeV, and order antiferromagnetically at about 380 K; the CuII-CuII exchange is only {approx}10thinspmeV, and the CuII{close_quote}s order at {approx}40thinspK. A study is reported here of the dependence of the magnetization on field, temperature, and crystallographic orientation for this interesting system. We show that the small permanent ferromagnetic moment, that appears when the CuI spins order, and the unusual spin rotation transitions seen most clearly for one particular direction of the magnetic field, are the result of several small bond-dependent anisotropic terms in the spin Hamiltonian that are revealed because of the frustration of the isotropic Heisenberg interaction between CuI and CuII spins. These include a term which favors collinearity of the CuI and CuII spins, which originates from quantum fluctuations, and also the pseudodipolar interaction. Some of these small interactions also come into play in other lamellar cuprates, connected with the high-T{sub c} superconductivity materials, and in many spin-chain and spin-ladder compounds. {copyright} {ital 1999} {ital The American Physical Society}},
doi = {10.1103/PhysRevB.59.14702},
url = {https://www.osti.gov/biblio/345427}, journal = {Physical Review, B: Condensed Matter},
number = 22,
volume = 59,
place = {United States},
year = {1999},
month = {6}
}