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

Asih, R., Adam, N., Mohd-Tajudin, S. S., Sari, D. P., Matsuhira, K., Guo, H., et al. (2017). Magnetic Moments and Ordered States in Pyrochlore Iridates Nd2Ir2O7 and Sm2Ir2O7 Studied by Muon-Spin Relaxation. Journal of the Physical Society of Japan, 86(2): 024705, pp. 1-7. doi:10.7566/JPSJ.86.024705.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-002C-6578-0 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-002D-C36D-5
Genre: Journal Article

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 Creators:
Asih, Retno1, Author
Adam, Noraina1, Author
Mohd-Tajudin, Saidah Sakinah1, Author
Sari, Dita Puspita1, Author
Matsuhira, Kazuyuki1, Author
Guo, Hanjie2, Author              
Wakeshima, Makoto1, Author
Hinatsu, Yukio1, Author
Nakano, Takehito1, Author
Nozue, Yasuo1, Author
Sulaiman, Shukri1, Author
Mohamed-Ibrahim, Mohamad Ismail1, Author
Biswas, Pabitra Kumar1, Author
Watanabe, Isao1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863445              

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 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 (mu SR) 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 mu SR 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 mu(B) and 0.2 mu(B) for Ir and Nd moments in Nd227, and 0.3 mu(B) and 0.1 mu(B) 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.

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Language(s): eng - English
 Dates: 2017-01-132017-01-13
 Publication Status: Published in print
 Pages: -
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 Table of Contents: -
 Rev. Method: -
 Identifiers: ISI: 000391861500020
DOI: 10.7566/JPSJ.86.024705
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Title: Journal of the Physical Society of Japan
Source Genre: Journal
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Publ. Info: Tokyo : The Society
Pages: - Volume / Issue: 86 (2) Sequence Number: 024705 Start / End Page: 1 - 7 Identifier: ISSN: 0031-9015
CoNE: /journals/resource/954925433407