M. Uhlarz

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Publications (2)0 Total impact

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    Article: Evolution of ferromagnetic order in URhGe alloyed with Ru, Co and Si
    S. Sakarya, N. T. Huy, N. H. van Dijk, A. de Visser, J. C. P. Klaasse, M. Wagemaker, A. C. Moleman, T. J. Gortenmulder, M. Uhlarz, H. v. Loehneysen
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    ABSTRACT: We have investigated the evolution of ferromagnetic order in the correlated metal URhGe (Curie temperature $T_{\rm C} = $9.5 K) by chemical substitution of Ru, Co and Si. Polycrystalline samples URh$_{1-x}$Ru$_x$Ge ($x \leq $0.6), URh$_{1-x}$Co$_x$Ge ($x \leq $0.9) and URhGe$_{1-x}$Si$_x$ ($x \leq $0.2) have been prepared and the magnetic properties have been investigated by magnetization and transport experiments. In the case of Ru doping, $T_{\rm C}$ initially increases, but then decreases linearly as a function of $x$ and is completely suppressed for $x_{\rm cr} \approx 0.38$. The Curie temperature in the URh$_{1-x}$Co$_x$Ge series has a broad maximum $T_{\rm C} = 20$ K near $x=0.6$ and then drops to 8 K for $x=0.9$. In the case of Si doping $T_{\rm C}$ stays roughly constant. We conclude that the alloy systems URh$_{1-x}$Ru$_x$Ge and URh$_{1-x}$Co$_x$Ge are interesting candidates to study the ferromagnetic instability.
    10/2006;
  • Article: Evolution of ferromagnetic order in URhGe alloyed with Ru, Co and Si
    S. Sakarya, N.T. Huy, N.H. van Dijk, A. de Visser, M. Wagemaker, A.C. Moleman, T.J. Gortenmulder, J.C.P. Klaasse, M. Uhlarz, H.v. Löhneysen
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    ABSTRACT: We have investigated the evolution of ferromagnetic order in the correlated metal URhGe (Curie temperature TC=9.5 K) by chemical substitution of Ru, Co and Si. Polycrystalline samples URh1−xRuxGe (x≤0.6), URh1−xCoxGe (x≤0.9) and URhGe1−xSix (x≤0.2) have been prepared and the magnetic properties have been investigated by magnetization and transport experiments. In the case of Ru doping, TC initially increases, but then decreases linearly as a function of x and is completely suppressed for xcr≈0.38. The Curie temperature in the URh1−xCoxGe series has a broad maximum TC=20 K near x=0.6 and then drops to 8 K for x=0.9. In the case of Si doping TC stays roughly constant. We conclude that the alloy systems URh1−xRuxGe and URh1−xCoxGe are interesting candidates to study the ferromagnetic instability.
    Journal of Alloys and Compounds.
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