Emergence of elastic softening in Sr8Ga16Si 30-xGex with increasing Ge concentration

Takashi Suzuki, Chika Okada, Yasuhiko Suetomi, Takahiro K. Fujita, Isao Ishii, Koichiro Suekuni, Marcos A. Avila, Toshiro Takabatake

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We have carried out an ultrasonic spectroscopy for the single crystals of Sr8Ga16Si30-xGex with x = 0, 15, 20, 24, and 30 in order to investigate cage-size dependence of elastic moduli. We present here the temperature dependence of transverse modulus C44 at various ultrasonic frequencies measured by using a pulse-echo type phase comparison technique. The C44 mode of the sample with x = 30 shows remarkable elastic softening below 100 K. In contrast, no softening is detected in the C44 mode of the samples with x = 0 and 15. We found clear correlation between the off-center motion of guest atoms and the elastic softening.

Original languageEnglish
Article numberSA038
Journaljournal of the physical society of japan
Volume80
Issue numberSUPPL. A
DOIs
Publication statusPublished - Jul 1 2011

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softening
ultrasonic spectroscopy
modulus of elasticity
echoes
ultrasonics
temperature dependence
single crystals
pulses
atoms

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Emergence of elastic softening in Sr8Ga16Si 30-xGex with increasing Ge concentration. / Suzuki, Takashi; Okada, Chika; Suetomi, Yasuhiko; Fujita, Takahiro K.; Ishii, Isao; Suekuni, Koichiro; Avila, Marcos A.; Takabatake, Toshiro.

In: journal of the physical society of japan, Vol. 80, No. SUPPL. A, SA038, 01.07.2011.

Research output: Contribution to journalArticle

Suzuki, T, Okada, C, Suetomi, Y, Fujita, TK, Ishii, I, Suekuni, K, Avila, MA & Takabatake, T 2011, 'Emergence of elastic softening in Sr8Ga16Si 30-xGex with increasing Ge concentration', journal of the physical society of japan, vol. 80, no. SUPPL. A, SA038. https://doi.org/10.1143/JPSJS.80SA.SA038
Suzuki, Takashi ; Okada, Chika ; Suetomi, Yasuhiko ; Fujita, Takahiro K. ; Ishii, Isao ; Suekuni, Koichiro ; Avila, Marcos A. ; Takabatake, Toshiro. / Emergence of elastic softening in Sr8Ga16Si 30-xGex with increasing Ge concentration. In: journal of the physical society of japan. 2011 ; Vol. 80, No. SUPPL. A.
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