Neutron diffraction study of antiferromagnetic ErNi3Ga9 in magnetic fields

Hiroki Ninomiya, Takaaki Sato, Yuji Matsumoto, Taketo Moyoshi, Akiko Nakao, Kazuki Ohishi, Yusuke Kousaka, Jun Akimitsu, Katsuya Inoue, Shigeo Ohara

    Research output: Contribution to journalArticlepeer-review

    1 Citation (Scopus)

    Abstract

    We report specific heat, magnetization, magnetoresistance, and neutron diffraction measurements of single crystals of ErNi3Ga9. This compound crystalizes in a chiral structure with space group R32. The erbium ions form a two–dimensional honeycomb structure. ErNi3Ga9 displays antiferromagnetic order below 6.4 K. We determined that the magnetic structure is slightly amplitude–modulated as well as antiferromagnetic with q=(0,0,0.5). The magnetic properties are described by an Ising–like model in which the magnetic moment is always along the c–axis owing to the large uniaxial anisotropy caused by the crystalline electric field effect in the low temperature region. When the magnetic field is applied along the c–axis, a metamagnetic transition is observed around 12 kOe at 2 K. ErNi3Ga9 possesses crystal chirality, but the antisymmetric magnetic interaction, the so-called Dzyaloshinskii–Moriya (DM) interaction, does not contribute to the magnetic structure, because the magnetic moments are parallel to the DM–vector.

    Original languageEnglish
    Pages (from-to)392-396
    Number of pages5
    JournalPhysica B: Condensed Matter
    Volume536
    DOIs
    Publication statusPublished - May 1 2018

    Keywords

    • Chiral crystal
    • DM-interaction
    • ErNiGa
    • Ising antiferromagnet
    • Metamagnetism
    • Neutron diffraction

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Electrical and Electronic Engineering

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