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Scaling study and thermodynamic properties of the cubic helimagnet FeGe

DOI: 10.1103/PhysRevB.94.144424 DOI Help

Authors: H. Wilhelm (Diamond Light Source) , A. O. Leonov (University of Groningen, Hiroshima University) , U. K. Rößler (IFW Dresden) , P. Burger (Karlsruhe Institute of Technology) , F. Hardy (Karlsruhe Institute of Technology) , C. Meingast (Karlsruhe Institute of Technology) , M. E. Gruner (University of Duisburg-Essen) , W. Schnelle (Max Planck Institute for Chemical Physics of Solids) , M. Schmidt (Max Planck Institute for Chemical Physics of Solids) , M. Baenitz (Max Planck Institute for Chemical Physics of Solids)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review B , VOL 94 , PAGES 144424

State: Published (Approved)
Published: October 2016

Abstract: The critical behavior of the cubic helimagnet FeGe was obtained from isothermal magnetization data in very close vicinity of the ordering temperature. A thorough and consistent scaling analysis of these data revealed the critical exponents β = 0.368, γ = 1.382, and δ = 4.787. The anomaly in the specific heat associated with the magnetic ordering can be well described by the critical exponent α =−0.133. The values of these exponents corroborate that the magnetic phase transition in FeGe belongs to the isotropic 3D-Heisenberg universality class. The specific heat data are well described by ab initio phonon calculations and confirm the localized character of the magnetic moments.

Journal Keywords: Critical exponents; Magnetic phase transitions; Magnetization measurements; Specific heat measurements; Thermal techniques

Subject Areas: Physics, Materials

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Added On: 21/10/2016 11:07

Discipline Tags:

Physics Magnetism Materials Science

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