Weak ferromagnetism and tricriticality in pure La2CuO4

Tineke Thio; Amnon Aharony

doi:10.1103/PhysRevLett.73.894

Weak ferromagnetism and tricriticality in pure La2CuO4

Tineke Thio
, Amnon Aharony

Research output: Contribution to journal › Article › peer-review

69 Scopus citations

Abstract

New data for the field dependent magnetization M(H) of pure antiferromagnetic La2CuO4 are fitted by a theory which treats the interlayer coupling using mean-field theory (MFT), and includes the Dzyaloshinskii-Moriya coupling. The fits yield a novel measure of the two-dimensional (2D) staggered susceptibility χ2D†, which deviates below 360 K from the 2D Heisenberg model. The fits also imply that the weak-ferromagnetic transition below the Néel point TN is weakly first order, with a tricritical point close to TN. The MFT nicely reproduces the order parameter and the cusp in χ=dMdH.

Original language	English
Pages (from-to)	894-897
Number of pages	4
Journal	Physical Review Letters
Volume	73
Issue number	6
DOIs	https://doi.org/10.1103/PhysRevLett.73.894
State	Published - 1 Jan 1994
Externally published	Yes

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General Physics and Astronomy

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10.1103/PhysRevLett.73.894

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title = "Weak ferromagnetism and tricriticality in pure La2CuO4",

abstract = "New data for the field dependent magnetization M(H) of pure antiferromagnetic La2CuO4 are fitted by a theory which treats the interlayer coupling using mean-field theory (MFT), and includes the Dzyaloshinskii-Moriya coupling. The fits yield a novel measure of the two-dimensional (2D) staggered susceptibility χ2D†, which deviates below 360 K from the 2D Heisenberg model. The fits also imply that the weak-ferromagnetic transition below the N{\'e}el point TN is weakly first order, with a tricritical point close to TN. The MFT nicely reproduces the order parameter and the cusp in χ=dMdH.",

author = "Tineke Thio and Amnon Aharony",

year = "1994",

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doi = "10.1103/PhysRevLett.73.894",

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AU - Aharony, Amnon

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N2 - New data for the field dependent magnetization M(H) of pure antiferromagnetic La2CuO4 are fitted by a theory which treats the interlayer coupling using mean-field theory (MFT), and includes the Dzyaloshinskii-Moriya coupling. The fits yield a novel measure of the two-dimensional (2D) staggered susceptibility χ2D†, which deviates below 360 K from the 2D Heisenberg model. The fits also imply that the weak-ferromagnetic transition below the Néel point TN is weakly first order, with a tricritical point close to TN. The MFT nicely reproduces the order parameter and the cusp in χ=dMdH.

AB - New data for the field dependent magnetization M(H) of pure antiferromagnetic La2CuO4 are fitted by a theory which treats the interlayer coupling using mean-field theory (MFT), and includes the Dzyaloshinskii-Moriya coupling. The fits yield a novel measure of the two-dimensional (2D) staggered susceptibility χ2D†, which deviates below 360 K from the 2D Heisenberg model. The fits also imply that the weak-ferromagnetic transition below the Néel point TN is weakly first order, with a tricritical point close to TN. The MFT nicely reproduces the order parameter and the cusp in χ=dMdH.

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M3 - Article

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JO - Physical Review Letters

JF - Physical Review Letters

IS - 6

ER -

Weak ferromagnetism and tricriticality in pure La2CuO4

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