Magnetic Susceptibility of Quasi-two-dimensional Cuprate Antiferromagnets

Parallel magnetic susceptibility temperature dependence of the high-TC superconducting parent compound La CuO 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 calculat...

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Bibliographic Details
Published inJournal of Research in Physics Vol. 37; no. 1; pp. 19 - 32
Main Authors Rutonjski, Milica S., Pantić, Milan R., Radošević, Slobodan M., Pavkov-Hrvojević, Milica V.
Format Journal Article
LanguageEnglish
Published Novi Sad De Gruyter Open 01.01.2013
De Gruyter Poland
Subjects
Anisotropy
Antiferromagnetism
Atomic force microscopy
COPPER OXIDE
Green’s function approach
MAGNETIC PERMEABILITY
MAGNETIC PROPERTIES
Magnetic susceptibility
MAGNETS
Magnons
MATHEMATICAL ANALYSIS
Mathematical models
PERMEABILITY
Quasi-two-dimensional antiferromagnetic copper oxides
Temperature dependence
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Summary:Parallel magnetic susceptibility temperature dependence of the high-TC superconducting parent compound La CuO 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.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
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ISSN:2217-933X
1450-7404
2217-933X
DOI:10.2478/jrp-2013-0002