<p>In this paper, we theoretically discuss the magnetocaloric effect in the compounds <InlineEquation ID="IEq5"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="339_2025_8881_Article_IEq1.gif" Format="GIF" Height="17" Rendition="HTML" Resolution="72" Type="Linedraw" Width="81" /> </InlineMediaObject> <EquationSource Format="TEX">\(Dy_{2}Cu_{2}In\)</EquationSource> </InlineEquation> and <InlineEquation ID="IEq6"> <InlineMediaObject> <ImageObject Color="BlackWhite" FileRef="339_2025_8881_Article_IEq2.gif" Format="GIF" Height="16" Rendition="HTML" Resolution="72" Type="Linedraw" Width="81" /> </InlineMediaObject> <EquationSource Format="TEX">\(Ho_{2}Cu_{2}In\)</EquationSource> </InlineEquation> whose experimental data indicate the existence of non equivalent magnetic sites. In order to take into account such an important feature, we adopt a model Hamiltonian of local interacting magnetic moments with two sublattices and anisotropy in the exchange magnetic interactions. Our theoretically calculated curves of the isothermal entropy changes are in reasonable agreement with the existing experimental data. However, there are no available experimental data to compare with our theoretical prediction of the adiabatic temperature change.</p>

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Anisotropic effects on the magnetocaloric properties of \(Dy_{2}Cu_{2}In\) and \(Ho_{2}Cu_{2}In\)

  • J. Caro Patiño,
  • N. A. de Oliveira

摘要

In this paper, we theoretically discuss the magnetocaloric effect in the compounds \(Dy_{2}Cu_{2}In\) and \(Ho_{2}Cu_{2}In\) whose experimental data indicate the existence of non equivalent magnetic sites. In order to take into account such an important feature, we adopt a model Hamiltonian of local interacting magnetic moments with two sublattices and anisotropy in the exchange magnetic interactions. Our theoretically calculated curves of the isothermal entropy changes are in reasonable agreement with the existing experimental data. However, there are no available experimental data to compare with our theoretical prediction of the adiabatic temperature change.