X-ray study of ferroic octupole order producing anomalous Hall effect

• Kimata, Motoi

  Institute for Materials Research, Tohoku University

• Sasabe, Norimasa

  Japan Synchrotron Radiation Research Institute (JASRI)

• Kurita, Kensuke

  Department of Physics, Tohoku University

• Yamasaki, Yuichi

  Research and Services Division of Materials Data and Integrated System (MaDIS), National Institute for Materials Science (NIMS); Center for Emergent Matter Science (CEMS), RIKEN; PRESTO, Japan Science and Technology Agency (JST); Institute of Materials Structure Science, High Energy Accelerator Research Organization

• Tabata, Chihiro

  Institute for Integrated Radiation and Nuclear Science, Kyoto University

• Yokoyama, Yuichi

  Japan Synchrotron Radiation Research Institute (JASRI)

• Kotani, Yoshinori

  Japan Synchrotron Radiation Research Institute (JASRI)

• Ikhlas, Muhammad

  Institute for Solid State Physics, University of Tokyo

• Tomita, Takahiro

  Institute for Solid State Physics, University of Tokyo

• Amemiya, Kenta

  Institute of Materials Structure Science, High Energy Accelerator Research Organization

• Nojiri, Hiroyuki

  Institute for Materials Research, Tohoku University

• Nakatsuji, Satoru

  Institute for Solid State Physics, University of Tokyo; Department of Physics, University of Tokyo; The Institute for Quantum Matter, Johns Hopkins University; Trans-scale Quantum Science Institute, University of Tokyo

• Koretsune, Takashi

  Department of Physics, Tohoku University

• Nakao, Hironori

  Institute of Materials Structure Science, High Energy Accelerator Research Organization

• Arima, Taka-hisa

  Center for Emergent Matter Science (CEMS), RIKEN; Department of Advanced Materials Science, University of Tokyo

• Nakamura, Tetsuya

  Institute for Materials Research, Tohoku University; Japan Synchrotron Radiation Research Institute (JASRI); International Center for Synchrotron Radiation Innovation Smart, Tohoku University

Abstract

Recently found anomalous Hall, Nernst, magnetooptical Kerr, and spin Hall effects in the antiferromagnets Mn₃X (X = Sn, Ge) are attracting much attention for spintronics and energy harvesting. Since these materials are antiferromagnets, the origin of these functionalities is expected to be different from that of conventional ferromagnets. Here, we report the observation of ferroic order of magnetic octupole in Mn₃Sn by X-ray magnetic circular dichroism, which is only predicted theoretically so far. The observed signals are clearly decoupled with the behaviors of uniform magnetization, indicating that the present X-ray magnetic circular dichroism is not arising from the conventional magnetization. We have found that the appearance of this anomalous signal coincides with the time reversal symmetry broken cluster magnetic octupole order. Our study demonstrates that the exotic material functionalities are closely related to the multipole order, which can produce unconventional cross correlation functionalities.

Journal

• Nature Communications

  Nature Communications 12 2021

  Springer Nature

Keywords

• Magnetic properties and materials
• Spintronics

Details

• CRID: 1050852581550963328
• NII Article ID: 120007153096
• DOI: 10.1038/s41467-021-25834-7
• ISSN: 20411723
• HANDLE: 2433/265316
• Web Site: https://www.nature.com/articles/s41467-021-25834-7.pdf
• Web Site: https://www.nature.com/articles/s41467-021-25834-7
• Text Lang: en
• Article Type: journal article
• Data Source:
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  • Crossref
  • CiNii Articles
  • KAKEN