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1993 | 84 | 4 | 705-708
Article title

Magnetic Specific Heat of (Cd_{1-x-y}Zn_{y}Mn_{x})_{3}As_{2}

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EN
Abstracts
EN
The specific heat of (Cd_{1-x-y}Zn_{y}Mn_{x})_{3}As_{2} with low Mn concentration (x ≤ 0.067) and for two Zn contents (y = 0.14 and y = 0.34) has been measured in the temperature range of 1.5-30 K. The magnetic contribution to the total specific heat has been analysed within our generalized pair approximation model which takes into account the complicated tetragonal crystal structure of Cd_{1-x-y}Zn_{y}Mn_{x})_{3}As_{2}. Assuming that the total Mn-Mn interaction strength is a sum of superexchange and the Bloembergen-Rowland exchange, we have obtained a very good agreement between our approach and experiment by using the analytical formulae with only two adjustable parameters, i.e. the first nearest-neighbour exchange constants for both mechanisms which appear to be strongly dependent on Zn content.
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Contributors
author
  • Department of Solid State Physics, Polish Academy of Sciences, Wandy 3, 41-800 Zabrze, Poland
author
  • Department of Solid State Physics, Polish Academy of Sciences, Wandy 3, 41-800 Zabrze, Poland
author
  • Laboratoire de Magnétisme Louis Néel, CNRS, Grenoble, France
author
  • Laboratoire de Magnétisme Louis Néel, CNRS, Grenoble, France
author
  • Service National des Champs Intenses, CNRS, Grenoble and Departement de Génie Physique, INSA, Toulouse, France
  • Department of Solid State Physics, Polish Academy of Sciences, Wandy 3, 41-800 Zabrze, Poland
References
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Publication order reference
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bwmeta1.element.bwnjournal-article-appv84z423kz
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