NMR evidence for triple-q→ multipole structure in NpO2

Y. Tokunaga; Y. Homma; S. Kambe; D. Aoki; H. Sakai; E. Yamamoto; A. Nakamura; Y. Shiokawa; R. E. Walstedt; H. Yasuoka

doi:10.1103/PhysRevLett.94.137209

NMR evidence for triple-q→ multipole structure in NpO₂

Y. Tokunaga, Y. Homma, S. Kambe, D. Aoki, H. Sakai, E. Yamamoto, A. Nakamura, Y. Shiokawa, R. E. Walstedt, H. Yasuoka

Materials Processing and Characterization Division

Research output: Contribution to journal › Article › peer-review

60 Citations (Scopus)

Abstract

In order to elucidate the nature of the exotic ordered phase of NpO ₂ below T₀ = 26 K, we have initiated the first ¹⁷O-NMR measurements on this system. From the ¹⁷O-NMR spectrum, the occurrence of two inequivalent oxygen sites has been confirmed below T₀- It has also been shown that the characteristic features of the hyperfine interaction at the oxygen sites are well explained by invoking a hyperfine interaction with field-induced antiferromagnetic moments which appear as a result of the triple-q→ antiferroquadrupolar order. The NMR findings strongly support the occurrence of the longitudinal triple-q→ multipole structure in NpO₂.

Original language	English
Article number	137209
Journal	Physical review letters
Volume	94
Issue number	13
DOIs	https://doi.org/10.1103/PhysRevLett.94.137209
Publication status	Published - 2005 Apr 8

ASJC Scopus subject areas

Physics and Astronomy(all)

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title = "NMR evidence for triple-q→ multipole structure in NpO2",

abstract = "In order to elucidate the nature of the exotic ordered phase of NpO 2 below T0 = 26 K, we have initiated the first 17O-NMR measurements on this system. From the 17O-NMR spectrum, the occurrence of two inequivalent oxygen sites has been confirmed below T0- It has also been shown that the characteristic features of the hyperfine interaction at the oxygen sites are well explained by invoking a hyperfine interaction with field-induced antiferromagnetic moments which appear as a result of the triple-q→ antiferroquadrupolar order. The NMR findings strongly support the occurrence of the longitudinal triple-q→ multipole structure in NpO2.",

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AU - Tokunaga, Y.

AU - Homma, Y.

AU - Kambe, S.

AU - Aoki, D.

AU - Sakai, H.

AU - Yamamoto, E.

AU - Nakamura, A.

AU - Shiokawa, Y.

AU - Walstedt, R. E.

AU - Yasuoka, H.

PY - 2005/4/8

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N2 - In order to elucidate the nature of the exotic ordered phase of NpO 2 below T0 = 26 K, we have initiated the first 17O-NMR measurements on this system. From the 17O-NMR spectrum, the occurrence of two inequivalent oxygen sites has been confirmed below T0- It has also been shown that the characteristic features of the hyperfine interaction at the oxygen sites are well explained by invoking a hyperfine interaction with field-induced antiferromagnetic moments which appear as a result of the triple-q→ antiferroquadrupolar order. The NMR findings strongly support the occurrence of the longitudinal triple-q→ multipole structure in NpO2.

AB - In order to elucidate the nature of the exotic ordered phase of NpO 2 below T0 = 26 K, we have initiated the first 17O-NMR measurements on this system. From the 17O-NMR spectrum, the occurrence of two inequivalent oxygen sites has been confirmed below T0- It has also been shown that the characteristic features of the hyperfine interaction at the oxygen sites are well explained by invoking a hyperfine interaction with field-induced antiferromagnetic moments which appear as a result of the triple-q→ antiferroquadrupolar order. The NMR findings strongly support the occurrence of the longitudinal triple-q→ multipole structure in NpO2.

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NMR evidence for triple-q→ multipole structure in NpO₂

Abstract

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