Time and Magnetic Field Variations of Magnetic Structure in the Triangular Lattice Magnet Ca₃Co₂O₆

Journal Article · 08 October 2018 · Journal of the Physical Society of Japan

DOI: https://doi.org/10.7566/JPSJ.87.114703 · OSTI ID:1513413

Motoya, Kiyoichiro ^[1]; Kihara, Takumi ^[2]; Nojiri, Hiroyuki ^[2]; Uwatoko, Yoshiya ^[3]; Matsuda, Masaaki  ^[4]; Hong, Tao  ^[4]

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1. Tokyo Univ. of Science, Chiba (Japan)
2. Tohoku Univ., Sendai (Japan)
3. Univ. of Tokyo, Chiba (Japan)
4. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

In a previous study, the long-time variation of the magnetic structure was investigated in the triangular lattice compound Ca₃Co₂O₆ in zero magnetic field. In this study, the magnetic field and time variations of the magnetic structure have been studied by magnetization and neutron scattering measurements. The magnetization curve shows a multistep increase, which suggests the presence of successive transitions to different magnetic structures. However, magnetic Bragg peaks corresponding to the long-period antiferromagnetic structure persist up to a high magnetic field close to saturation magnetization. After the magnetic field is removed, a diffuse magnetic scattering signal due to short-range correlations grows with time instead of the Bragg peaks owing to the antiferromagnetic structure in the initial state. A model to account for the magnetic field and time variations of the magnetic structure is presented.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
• Grant/Contract Number: AC05-00OR22725
• OSTI ID: 1513413
• Journal Information: Journal of the Physical Society of Japan, Journal Name: Journal of the Physical Society of Japan Journal Issue: 11 Vol. 87; ISSN 0031-9015
• Publisher: Physical Society of JapanCopyright Statement
• Country of Publication: United States
• Language: English