Magnetic Moments and Ordered States in Pyrochlore Iridates Nd2Ir2O7 and Sm2Ir2O7 Studied by Muon-Spin Relaxation

• Asih, Retno

• Adam, Noraina

• Mohd-Tajudin, Saidah Sakinah

• Sari, Dita Puspita

• Matsuhira, Kazuyuki

• Guo, Hanjie

• Wakeshima, Makoto

• Hinatsu, Yukio

• Nakano, Takehito

• Nozue, Yasuo

• Sulaiman, Shukri

• Mohamed-Ibrahim, Mohamad Ismail

• Biswas, Pabitra Kumar

• Watanabe, Isao

Bibliographic Information

Other Title

• Magnetic Moments and Ordered States in Pyrochlore Iridates Nd₂Ir₂O₇ and Sm₂Ir₂O₇ Studied by Muon-Spin Relaxation

Abstract

Magnetic-ordered states of the pyrochlore iridates Nd2Ir2O7 (Nd227) and Sm2Ir2O7 (Sm227), showing metal–insulator transitions at 33 and 117 K, respectively, were studied by both the muon-spin-relaxation (μSR) method and density functional theory (DFT) calculations. A long-range magnetic ordering of Ir moments appeared in conjunction with the metal insulator transition, and additional long-range-ordered states of Nd/Sm moments were confirmed at temperatures below about 10 K. We found that the all-in all-out spin structure most convincingly explained the present μSR results of both Nd227 and Sm227. Observed internal fields were compared with values derived from DFT calculations. The lower limits of the sizes of magnetic moments were estimated to be 0.12 μB and 0.2 μB for Ir and Nd moments in Nd227, and 0.3 μB and 0.1 μB for Ir and Sm moments in Sm227, respectively. Further analysis indicated that the spin coupling between Ir and Nd/Sm moments was ferromagnetic for Nd227 and antiferromagnetic for Sm227.

Journal

• Journal of the Physical Society of Japan

  Journal of the Physical Society of Japan 86 (2), 024705-024705, 2017-02-15

  日本物理学会

Keywords

• General Physics and Astronomy

Details

• CRID: 1050001338911032960
• NII Article ID: 210000134266
• NII Article ID: 120006347478
• NII Book ID: AA00704814
• DOI: 10.7566/jpsj.86.024705
• ISSN: 13474073
• ISSN: http://id.crossref.org/issn/13474073
• ISSN: 00319015
• HANDLE: 10228/00006390
• NDL BIB ID: 027982371
• Web Site: https://kyutech.repo.nii.ac.jp/records/5178
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I027982371
• Web Site: https://journals.jps.jp/doi/pdf/10.7566/JPSJ.86.024705
• Text Lang: en
• Article Type: journal article
• Data Source:
  • IRDB
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN