Magnetic anisotropy study of UGe2in a static high magnetic field

T. Sakon, S. Saito, K. Koyama, S. Awaji, I. Sato, T. Nojima, K. Watanabe, M. Motokawa, N. K. Sato

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Abstract

UGe2 has orthorhombic Cmmm crystalline symmmetry and shows ferromagnetic Heavy-Fermion (HF) Superconductor, which provides superconductivity under pressure in the range from 1.0 GPa to 1.5 GPa. Magnetic field dependence of magnetization shows strong magnetic anisotropy. When a magnetic field is applied parallel to easy axis (a-axis), magnetization presents ferromagnetic behavior. At 4.2 K, which is much lower than the Curie temperature Tc 54 K. Spontaneous magnetization is 1.4 μB/U, and the magnetization gradually increase with increasing field. On the contrary, when a field is applied parallel to hard axis (b-axis or c-axis), magnetization increases linearly with increasing magnetic field. As for H//b-axis, magnetization is 0.23 μ B/U even at 27 T. Magnetocrystalline anisotropy constant is obtained as 230 [T μB] 3.4[kJ/kg] at 4.2 K. This value is comparable with rare-earth magnet Nd 2Fe17, which is typical strongly correlated ferromagnet.

Original languageEnglish
Article number058
Pages (from-to)255-258
Number of pages4
JournalJournal of Physics: Conference Series
Volume51
Issue number1
DOIs
Publication statusPublished - 2006 Dec 1

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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    Sakon, T., Saito, S., Koyama, K., Awaji, S., Sato, I., Nojima, T., Watanabe, K., Motokawa, M., & Sato, N. K. (2006). Magnetic anisotropy study of UGe2in a static high magnetic field. Journal of Physics: Conference Series, 51(1), 255-258. [058]. https://doi.org/10.1088/1742-6596/51/1/058