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Journal of Research in Physics

The Journal of University of Novi Sad

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2217-933X
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Magnetic Susceptibility of Quasi-two-dimensional Cuprate Antiferromagnets

Milica S. Rutonjski
  • Corresponding author
  • Department of Physics, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 4, Novi Sad, Serbia
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/ Milan R. Pantić
  • Department of Physics, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 4, Novi Sad, Serbia
  • Other articles by this author:
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/ Slobodan M. Radošević
  • Department of Physics, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 4, Novi Sad, Serbia
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/ Milica V. Pavkov-Hrvojević
  • Department of Physics, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 4, Novi Sad, Serbia
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  • De Gruyter OnlineGoogle Scholar
Published Online: 2014-05-27 | DOI: https://doi.org/10.2478/jrp-2013-0002

Abstract

Parallel magnetic susceptibility temperature dependence of the high-TC superconducting parent compound La2CuO4 is calculated in both antiferromagnetic (AFM) and paramagnetic phase. By making use of the quantum Heisenberg three-dimensional AFM model including the in-plane spin anisotropy, the calculation is performed within the framework of three different theories: Green’s function theory in random-phase approximation (RPA), linear spinwave (LSW) theory and mean-field (MF) theory. The results suggest that at low temperatures quantum spin fluctuations play an important role, while at the temperatures above the critical one short-range correlations have a great impact on the behavior of the system. This leads to the discrepancy between RPA and MF results, since the later neglects the above phenomena. Further, LSW theory expectedly agrees with RPA results only at low temperatures where the magnon interactions are negligible. Comparison to the theoretical and experimental results quoted in literature confirms that RPA method presents the most appropriate method among the applied ones, suggesting that this approach is satisfactory in the case of the parallel magnetic susceptibility, while in order to reproduce the transversal one, spin-orbit coupling must be included.

Keywords: Quasi-two-dimensional antiferromagnetic copper oxides; magnetic susceptibility; Green’s function approach

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About the article

Received: 2013-11-07

Published Online: 2014-05-27

Published in Print: 2013-01-01


Citation Information: Journal of Research in Physics, ISSN (Online) 2217-933X, DOI: https://doi.org/10.2478/jrp-2013-0002.

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© by Milica S. Rutonjski. This article is distributed under the terms of the Creative Commons Attribution Non-Commercial License, which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. BY-NC-ND 3.0

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