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 journalArticle

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

Fingerprint

Magnetic structure
Neutron diffraction
Magnetic moments
neutron diffraction
Erbium
Magnetic fields
Electric field effects
Honeycomb structures
Chirality
Magnetoresistance
magnetic moments
diffraction
magnetic fields
Specific heat
honeycomb structures
Magnetization
Magnetic properties
Anisotropy
Single crystals
Ions

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

Cite this

Ninomiya, H., Sato, T., Matsumoto, Y., Moyoshi, T., Nakao, A., Ohishi, K., ... Ohara, S. (2018). Neutron diffraction study of antiferromagnetic ErNi3Ga9 in magnetic fields. Physica B: Condensed Matter, 536, 392-396. https://doi.org/10.1016/j.physb.2017.09.057

Neutron diffraction study of antiferromagnetic ErNi3Ga9 in magnetic fields. / Ninomiya, Hiroki; Sato, Takaaki; Matsumoto, Yuji; Moyoshi, Taketo; Nakao, Akiko; Ohishi, Kazuki; Kousaka, Yusuke; Akimitsu, Jun; Inoue, Katsuya; Ohara, Shigeo.

In: Physica B: Condensed Matter, Vol. 536, 01.05.2018, p. 392-396.

Research output: Contribution to journalArticle

Ninomiya, H, Sato, T, Matsumoto, Y, Moyoshi, T, Nakao, A, Ohishi, K, Kousaka, Y, Akimitsu, J, Inoue, K & Ohara, S 2018, 'Neutron diffraction study of antiferromagnetic ErNi3Ga9 in magnetic fields', Physica B: Condensed Matter, vol. 536, pp. 392-396. https://doi.org/10.1016/j.physb.2017.09.057
Ninomiya H, Sato T, Matsumoto Y, Moyoshi T, Nakao A, Ohishi K et al. Neutron diffraction study of antiferromagnetic ErNi3Ga9 in magnetic fields. Physica B: Condensed Matter. 2018 May 1;536:392-396. https://doi.org/10.1016/j.physb.2017.09.057
Ninomiya, Hiroki ; Sato, Takaaki ; Matsumoto, Yuji ; Moyoshi, Taketo ; Nakao, Akiko ; Ohishi, Kazuki ; Kousaka, Yusuke ; Akimitsu, Jun ; Inoue, Katsuya ; Ohara, Shigeo. / Neutron diffraction study of antiferromagnetic ErNi3Ga9 in magnetic fields. In: Physica B: Condensed Matter. 2018 ; Vol. 536. pp. 392-396.
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AB - 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.

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