Critical Scaling of the Magnetization and Magnetostriction in the Weak Itinerant Ferromagnet UIr

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概要

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• The weak itinerant ferromagnet UIr is studied by magnetization and magnetostriction. Critical behavior, which surprisingly extends up to several Tesla, is observed at the Curie temperature $T_{\text{C}}\simeq 45$ K and is analyzed using Arrott and Maxwell relations. Critical exponents are found that do not match with any of the well-known universality classes. The low-temperature magnetization $M_{\text{s}}\simeq 0.5$ $\mu_{\text{B}}$ below 3 T rises towards higher fields and converges asymptotically around 50 T with the magnetization at $T_{\text{C}}$. From the magnetostriction and magnetization data, we extract the uniaxial pressure dependences of $T_{\text{C}}$, using a new method presented here, and of $M_{\text{s}}$. These results may serve as a basis for understanding spin fluctuations in anisotropic itinerant ferromagnets.

• 2009-04-15

著者

• Van Dijk

  Fundamental Aspects And Materials And Energy Delft University Of Technology

• Huang Yingkai

  Van Der Waals-zeeman Institute University Of Amsterdam

• Knafo William

  Forschungszentrum Karlsruhe Institut Fur Festkorperphysik

• Sakarya Serdar

  Fundamental Aspects And Materials And Energy Delft University Of Technology

• Meingast Christoph

  Forschungszentrum Karlsruhe Institut Fur Festkorperphysik

• Meingast Christoph

  Forschungszentrum Karlsruhe, Institut für Festkörperphysik, D-76021 Karlsruhe, Germany

• Knafo William

  Forschungszentrum Karlsruhe, Institut für Festkörperphysik, D-76021 Karlsruhe, Germany

• Broto Jean-Marc

  Laboratoire National des Champs Magnétiques Intenses, UPR 3228, CNRS-UPS-INSA-UJF, 143 Avenue de Rangueil, 31400 Toulouse, Cedex 4, France

• van Dijk

  Fundamental Aspects of Materials and Energy, Delft University of Technology, Mekelweg 15, 2629 JB Delft, The Netherlands

• Rakoto Harison

  Laboratoire National des Champs Magnétiques Intenses, UPR 3228, CNRS-UPS-INSA-UJF, 143 Avenue de Rangueil, 31400 Toulouse, Cedex 4, France

• Sakarya Serdar

  Fundamental Aspects of Materials and Energy, Delft University of Technology, Mekelweg 15, 2629 JB Delft, The Netherlands

• v. Löhneysen

  Forschungszentrum Karlsruhe, Institut für Festkörperphysik, D-76021 Karlsruhe, Germany

• Huang Yingkai

  Van der Waals–Zeeman Institute, University of Amsterdam, Valckenierstraat 65, 1018 XE Amsterdam, The Netherlands

関連論文

• Critical Scaling of the Magnetization and Magnetostriction in the Weak Itinerant Ferromagnet UIr
• Characterization of the Weak Itinerant Ferromagnetic Order in Single-Crystalline UIr
• High-Resolution Thermal Expansion of Solids : Recent Results on Superconducting YBa_2Cu_3O_x Single Crystals
• Critical Scaling of the Magnetization and Magnetostriction in the Weak Itinerant Ferromagnet UIr

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