Thermal expansion and ultrasonic measurements of ferroquadrupole ordering in HoB6

Takashi Yamaguchi; Mitsuhiro Akatsu; Yoshiyuki Nakano; Takehito Washizawa; Yuichi Nemoto; Terutaka Goto; Andreas Dönni; Shintaro Nakamura; Satoru Kunii

doi:10.1016/S0921-4526(02)02524-3

Thermal expansion and ultrasonic measurements of ferroquadrupole ordering in HoB₆

Takashi Yamaguchi, Mitsuhiro Akatsu, Yoshiyuki Nakano, Takehito Washizawa, Yuichi Nemoto, Terutaka Goto, Andreas Dönni, Shintaro Nakamura, Satoru Kunii

Institute for Materials Research (IMR) (institute affiliation only)

Research output: Contribution to journal › Article

6 Citations (Scopus)

Abstract

Rare-earth hexaboride HoB₆ shows a ferroquadrupole ordering of O_yz, O_zx and O_xy with Γ_Q symmetry at TQ = 6.1 K accompanied by a structural change from cubic to trigonal. In order to examine the order parameter in HoB₆, we have performed ultrasonic and thermal expansion measurements. The lattice length along [001] expands ΔL/L_[001] = 2.5 × 10^-4 just below T_Q, while the length along [111] shrinks appreciably ΔL/L_[111] = -4.5 × 10^-3. This result confirms the cubic-trigonal distortion observed by neutron scattering experiments.

Original language	English
Pages (from-to)	622-623
Number of pages	2
Journal	Physica B: Condensed Matter
Volume	329-333
Issue number	II
DOIs	https://doi.org/10.1016/S0921-4526(02)02524-3
Publication status	Published - 2003 May

Keywords

Fcrroquadrupole ordering
HoB
Thermal expansion
Ultrasound

ASJC Scopus subject areas

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

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Thermal expansion and ultrasonic measurements of ferroquadrupole ordering in HoB₆. / Yamaguchi, Takashi; Akatsu, Mitsuhiro; Nakano, Yoshiyuki; Washizawa, Takehito; Nemoto, Yuichi; Goto, Terutaka; Dönni, Andreas; Nakamura, Shintaro; Kunii, Satoru.

In: Physica B: Condensed Matter, Vol. 329-333, No. II, 05.2003, p. 622-623.

Research output: Contribution to journal › Article

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abstract = "Rare-earth hexaboride HoB6 shows a ferroquadrupole ordering of Oyz, Ozx and Oxy with ΓQ symmetry at TQ = 6.1 K accompanied by a structural change from cubic to trigonal. In order to examine the order parameter in HoB6, we have performed ultrasonic and thermal expansion measurements. The lattice length along [001] expands ΔL/L[001] = 2.5 × 10-4 just below TQ, while the length along [111] shrinks appreciably ΔL/L[111] = -4.5 × 10-3. This result confirms the cubic-trigonal distortion observed by neutron scattering experiments.",

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AU - Akatsu, Mitsuhiro

AU - Nakano, Yoshiyuki

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AU - Nemoto, Yuichi

AU - Goto, Terutaka

AU - Dönni, Andreas

AU - Nakamura, Shintaro

AU - Kunii, Satoru

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AB - Rare-earth hexaboride HoB6 shows a ferroquadrupole ordering of Oyz, Ozx and Oxy with ΓQ symmetry at TQ = 6.1 K accompanied by a structural change from cubic to trigonal. In order to examine the order parameter in HoB6, we have performed ultrasonic and thermal expansion measurements. The lattice length along [001] expands ΔL/L[001] = 2.5 × 10-4 just below TQ, while the length along [111] shrinks appreciably ΔL/L[111] = -4.5 × 10-3. This result confirms the cubic-trigonal distortion observed by neutron scattering experiments.

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