TY - JOUR
T1 - Thermal expansion and ultrasonic measurements of ferroquadrupole ordering in HoB6
AU - Yamaguchi, Takashi
AU - Akatsu, Mitsuhiro
AU - Nakano, Yoshiyuki
AU - Washizawa, Takehito
AU - Nemoto, Yuichi
AU - Goto, Terutaka
AU - Dönni, Andreas
AU - Nakamura, Shintaro
AU - Kunii, Satoru
PY - 2003/5
Y1 - 2003/5
N2 - 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.
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.
KW - Fcrroquadrupole ordering
KW - HoB
KW - Thermal expansion
KW - Ultrasound
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U2 - 10.1016/S0921-4526(02)02524-3
DO - 10.1016/S0921-4526(02)02524-3
M3 - Article
AN - SCOPUS:23144464393
SN - 0921-4526
VL - 329-333
SP - 622
EP - 623
JO - Physica B: Condensed Matter
JF - Physica B: Condensed Matter
IS - II
ER -