Multipole effects in non-Kramers doublet system PrMg3

K. Araki; T. Yoshikawa; M. Akatsu; I. Ishii; Y. Nemoto; T. Goto; H. S. Suzuki; H. Tanida; S. Takagi; B. Lüthi

doi:10.1016/j.physb.2009.07.051

Multipole effects in non-Kramers doublet system PrMg₃

K. Araki, T. Yoshikawa, M. Akatsu, I. Ishii, Y. Nemoto, T. Goto, H. S. Suzuki, H. Tanida, S. Takagi, B. Lüthi

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

1 Citation (Scopus)

Abstract

We performed ultrasonic measurements on a single crystal of PrMg₃. The characteristic Curie-type softening was observed in temperature dependence of transverse mode (C₁₁ - C₁₂) / 2 below 8 K down to 0.8 K. This softening in PrMg₃ is caused by a non-Kramers Γ₃ doublet ground state having electric quadrupoles O_u and O_v and magnetic octupole T_xyz. The elastic constant (C₁₁ - C₁₂) / 2 shows a minimum at 25 K, which cannot be explained by the quadrupole susceptibility based on the crystal electric field (CEF) levels. However, considering higher order (l = 4) multipole, namely electric hexadecapole, the minimum around 25 K was well reproduced. At lower temperatures, a shoulder anomaly in elastic constant being deviated from the Curie-type softening was observed around 100-800 mK in (C₁₁ - C₁₂) / 2. This anomaly is unaffected by magnetic fields up to 14 T.

Original language	English
Pages (from-to)	3187-3190
Number of pages	4
Journal	Physica B: Condensed Matter
Volume	404
Issue number	19
DOIs	https://doi.org/10.1016/j.physb.2009.07.051
Publication status	Published - 2009 Oct 15
Externally published	Yes

Keywords

Elastic constant
Multipole
Non-Kramers doublet
PrMg
Ultrasound

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics
Electrical and Electronic Engineering

Access to Document

10.1016/j.physb.2009.07.051

Cite this

@article{e1fbd4d57b194989822a0ed4f7bccc57,

title = "Multipole effects in non-Kramers doublet system PrMg3",

abstract = "We performed ultrasonic measurements on a single crystal of PrMg3. The characteristic Curie-type softening was observed in temperature dependence of transverse mode (C11 - C12) / 2 below 8 K down to 0.8 K. This softening in PrMg3 is caused by a non-Kramers Γ3 doublet ground state having electric quadrupoles Ou and Ov and magnetic octupole Txyz. The elastic constant (C11 - C12) / 2 shows a minimum at 25 K, which cannot be explained by the quadrupole susceptibility based on the crystal electric field (CEF) levels. However, considering higher order (l = 4) multipole, namely electric hexadecapole, the minimum around 25 K was well reproduced. At lower temperatures, a shoulder anomaly in elastic constant being deviated from the Curie-type softening was observed around 100-800 mK in (C11 - C12) / 2. This anomaly is unaffected by magnetic fields up to 14 T.",

keywords = "Elastic constant, Multipole, Non-Kramers doublet, PrMg, Ultrasound",

author = "K. Araki and T. Yoshikawa and M. Akatsu and I. Ishii and Y. Nemoto and T. Goto and Suzuki, {H. S.} and H. Tanida and S. Takagi and B. L{\"u}thi",

note = "Funding Information: The present work was supported by Grand-in Aid for Specially Promoted Research of the Ministry of Education, Culture, Sports, Science and Technology (no. 18002008). Strongly correlated quantum phases associated with charge fluctuations.",

year = "2009",

month = oct,

day = "15",

doi = "10.1016/j.physb.2009.07.051",

language = "English",

volume = "404",

pages = "3187--3190",

journal = "Physica B: Condensed Matter",

issn = "0921-4526",

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T1 - Multipole effects in non-Kramers doublet system PrMg3

AU - Araki, K.

AU - Yoshikawa, T.

AU - Akatsu, M.

AU - Ishii, I.

AU - Nemoto, Y.

AU - Goto, T.

AU - Suzuki, H. S.

AU - Tanida, H.

AU - Takagi, S.

AU - Lüthi, B.

N1 - Funding Information: The present work was supported by Grand-in Aid for Specially Promoted Research of the Ministry of Education, Culture, Sports, Science and Technology (no. 18002008). Strongly correlated quantum phases associated with charge fluctuations.

PY - 2009/10/15

Y1 - 2009/10/15

N2 - We performed ultrasonic measurements on a single crystal of PrMg3. The characteristic Curie-type softening was observed in temperature dependence of transverse mode (C11 - C12) / 2 below 8 K down to 0.8 K. This softening in PrMg3 is caused by a non-Kramers Γ3 doublet ground state having electric quadrupoles Ou and Ov and magnetic octupole Txyz. The elastic constant (C11 - C12) / 2 shows a minimum at 25 K, which cannot be explained by the quadrupole susceptibility based on the crystal electric field (CEF) levels. However, considering higher order (l = 4) multipole, namely electric hexadecapole, the minimum around 25 K was well reproduced. At lower temperatures, a shoulder anomaly in elastic constant being deviated from the Curie-type softening was observed around 100-800 mK in (C11 - C12) / 2. This anomaly is unaffected by magnetic fields up to 14 T.

AB - We performed ultrasonic measurements on a single crystal of PrMg3. The characteristic Curie-type softening was observed in temperature dependence of transverse mode (C11 - C12) / 2 below 8 K down to 0.8 K. This softening in PrMg3 is caused by a non-Kramers Γ3 doublet ground state having electric quadrupoles Ou and Ov and magnetic octupole Txyz. The elastic constant (C11 - C12) / 2 shows a minimum at 25 K, which cannot be explained by the quadrupole susceptibility based on the crystal electric field (CEF) levels. However, considering higher order (l = 4) multipole, namely electric hexadecapole, the minimum around 25 K was well reproduced. At lower temperatures, a shoulder anomaly in elastic constant being deviated from the Curie-type softening was observed around 100-800 mK in (C11 - C12) / 2. This anomaly is unaffected by magnetic fields up to 14 T.

KW - Elastic constant

KW - Multipole

KW - Non-Kramers doublet

KW - PrMg

KW - Ultrasound

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