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Magnetic phase transitions and phase diagrams of DyMn2Ge2

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Abstract

The experimental studies of magnetic phase transitions in the layered tetragonal intermetallic compound DyMn2Ge2 are continued. The existence of spontaneous phase transitions is confirmed by the results of measurements of the temperature dependences of lattice parameters and the initial magnetic susceptibility. The measurements in strong (up to 50 T) and ultrastrong (up to 150 T) fields revealed two new field-induced magnetic transitions. The inclusion of the exchange interaction between next-to-nearest layers of manganese and the crystal field effects for the rare-earth subsystem along with the antiferromagnetic exchange interaction of nearest Mn layers has made it possible to describe the magnetic properties of DyMn2Ge2 in a wide range of magnetic fields. The parameters of these interactions are determined from a comparison of the experimental and theoretical magnetization curves and H-T phase diagrams.

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Authors and Affiliations

  1. Moscow State University, Vorob’evy gory, Moscow, 119899, Russia

    Guo Guanghua & R. Z. Levitin

  2. Bryansk State Technical University, Bryansk, 241035, Russia

    M. V. Eremin, N. P. Kolmakova & A. A. Sidorenko

  3. von Humboldt Universität, D-10115, Berlin, Germany

    A. Kirste & M. von Ortenberg

  4. Institute of Molecular Physics, Russian Research Centre, Kurchatov Institute, pl. Kurchatova 1, Moscow, 123182, Russia

    A. S. Lagutin

Authors
  1. Guo Guanghua
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  2. M. V. Eremin
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  3. A. Kirste
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  4. N. P. Kolmakova
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  5. A. S. Lagutin
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  6. R. Z. Levitin
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  7. M. von Ortenberg
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  8. A. A. Sidorenko
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Translated from Zhurnal Éksperimental’no\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) i Teoretichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l}\) Fiziki, Vol. 120, No. 4, 2001, pp. 910–920.

Original Russian Text Copyright © 2001 by Guo Guanghua, Eremin, Kirste, Kolmakova, Lagutin, Levitin, von Ortenberg, Sidorenko.

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Guanghua, G., Eremin, M.V., Kirste, A. et al. Magnetic phase transitions and phase diagrams of DyMn2Ge2 . J. Exp. Theor. Phys. 93, 796–804 (2001). https://doi.org/10.1134/1.1420448

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  • DOI: https://doi.org/10.1134/1.1420448

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