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

• Authors: H. Bednarski , J. Cisowski , D. Schmitt , J. Voiron , J. Portal , W. Lubczyński
• Languages of publication: 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.

Keywords

EN

75.40.-s; 75.30.Et

Discipline

• 75.30.Et: Exchange and superexchange interactions(see also 71.70.Gm Exchange interactions)
• 75.40.-s: Critical-point effects, specific heats, short-range order(for equilibrium properties near critical points, see 64.60.F-; for dynamical critical phenomena, see 64.60.Ht)

• Publisher: Institute of Physics, Polish Academy of Sciences
• Journal: Acta Physica Polonica A
• Year: 1993
• Volume: 84
• Issue: 4
• Pages: 705-708

Dates

published

1993-10

Contributors

author

H. Bednarski

• Department of Solid State Physics, Polish Academy of Sciences, Wandy 3, 41-800 Zabrze, Poland

author

J. Cisowski

• Department of Solid State Physics, Polish Academy of Sciences, Wandy 3, 41-800 Zabrze, Poland

author

D. Schmitt

• Laboratoire de Magnétisme Louis Néel, CNRS, Grenoble, France

author

J. Voiron

• Laboratoire de Magnétisme Louis Néel, CNRS, Grenoble, France

author

J. Portal

• Service National des Champs Intenses, CNRS, Grenoble and Departement de Génie Physique, INSA, Toulouse, France

author

W. Lubczyński

• Department of Solid State Physics, Polish Academy of Sciences, Wandy 3, 41-800 Zabrze, Poland

Identifiers

DOI

10.12693/APhysPolA.84.705