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Absorption of light by exchange-coupled ions in a 2D antiferromagnet

  • Magnetism and Ferroelectricity
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Abstract

The optical absorption spectra of Rb2MnxCd1−x Cl4 crystals are experimentally studied in the vicinity of a magnon sideband of the exciton band at a manganese content x ranging from 1.0 to 0.4. Additional absorption bands are observed with an increase in the magnetic structural disorder upon replacement of manganese ions by cadmium ions. An analysis of the evolution of the additional absorption bands in a magnetic field during the spin-flop phase transition and the change in the intensity with variations in the manganese content x demonstrates that these bands are associated with the excitation of the exchange-coupled pairs of manganese ions located in different environments in a plane square lattice. The phase boundary between the antiferromagnetic and spin-flop phases is constructed using the results of optical measurements. The manganese content corresponding to the magnetic percolation point is evaluated.

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Authors and Affiliations

  1. Siberian State Aerospace University, Krasnoyarsk, 660014, Russia

    E. A. Popov

  2. Kirensky Institute of Physics, Siberian Division, Russian Academy of Sciences, Akademgorodok, Krasnoyarsk, 660036, Russia

    B. V. Beznosikov

Authors
  1. E. A. Popov
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  2. B. V. Beznosikov
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Additional information

__________

Translated from Fizika Tverdogo Tela, Vol. 45, No. 8, 2003, pp. 1406–1408.

Original Russian Text Copyright © 2003 by Popov, Beznosikov.

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Popov, E.A., Beznosikov, B.V. Absorption of light by exchange-coupled ions in a 2D antiferromagnet. Phys. Solid State 45, 1475–1478 (2003). https://doi.org/10.1134/1.1602882

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  • DOI: https://doi.org/10.1134/1.1602882

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