Magnetic dynamics of La2CuO4 studied by Mössbauer spectroscopy

1 May 1990

journal article
research article
Published by AIP Publishing in Journal of Applied Physics

Vol. 67 (9), 4518-4520
https://doi.org/10.1063/1.344855

Abstract

By doping a very small amount of ⁵⁷Fe into La₂CuO₄, Mössbauer spectroscopy has been applied to study the magnetic property of the parent compound. From the measurement of the magnetic hyperfine field at the Fe nuclei for various temperatures between 4.2 K and T_N, the temperature dependence of the sublattice magnetization for La₂CuO₄ has been discussed. A theoretical calculation shows that, with temperature increasing a 3D‐2D dimensional crossover occurs in the magnetic dynamics of an anisotropic antiferromagnetic, which is indeed confirmed by the data. The best fit to the data using this theory yields J=1600 K and r=0.011.

Keywords

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