TY - JOUR
T1 - Ultrasonic attenuation measurements on the Kondo behavior of CeCu6
AU - Lin, S. W.
AU - Ran, Q. Z.
AU - Adenwalla, S.
AU - Zhao, Z.
AU - Ketterson, J. B.
AU - Hinks, D. G.
AU - Levy, M.
AU - Sarma, Bimal K.
N1 - Funding Information:
The research at UWhl was supported by thr Office of Naval Research; the research at Nortliwestern was supported by NSF under Grant No. DhIR89-07396 and the research at Argonne was supported by DOE urider Grant No. W-31-109-ENG-38.
Funding Information:
The research at UWM was supported by the Office of Naval Research; the research at Northwestern was supported by NSF under Grant No. DMR89-07396 and the research at Argonne was supported by DOE under Grant No. W-31-109-ENG-38.
Publisher Copyright:
© 1991 IEEE.
PY - 1991
Y1 - 1991
N2 - The heavy fermion compound CeCu6 demonstrates typical Kondo behavior at low temperatures. Ultrasonic attenuation measurements were performed on a CeCu6 single crystal with frequencies up to 800 MHz over a temperature range from 200 K to 0.5 K. As the temperature was lowered to about 20 K, the attenuation decreased monotonically. However, at temperatures between 2 K to 10 K, the attenuation exhibited a well defined absorption peak. As the temperature was lowered below about 2 K, the attenuation increased monotonically. The amplitude of the absorption peak was proportional to the frequency and the peak moved to higher temperatures when the frequency was increased. This absorption peak can be well fitted by α ∼ ω2τ/(1 + ω2τ2), from which an inverse power law temperature dependence of the relaxation time t is obtained. Crystalline electric fields developed at low temperatures may be responsible for the absorption peak.
AB - The heavy fermion compound CeCu6 demonstrates typical Kondo behavior at low temperatures. Ultrasonic attenuation measurements were performed on a CeCu6 single crystal with frequencies up to 800 MHz over a temperature range from 200 K to 0.5 K. As the temperature was lowered to about 20 K, the attenuation decreased monotonically. However, at temperatures between 2 K to 10 K, the attenuation exhibited a well defined absorption peak. As the temperature was lowered below about 2 K, the attenuation increased monotonically. The amplitude of the absorption peak was proportional to the frequency and the peak moved to higher temperatures when the frequency was increased. This absorption peak can be well fitted by α ∼ ω2τ/(1 + ω2τ2), from which an inverse power law temperature dependence of the relaxation time t is obtained. Crystalline electric fields developed at low temperatures may be responsible for the absorption peak.
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U2 - 10.1109/ULTSYM.1991.234266
DO - 10.1109/ULTSYM.1991.234266
M3 - Conference article
AN - SCOPUS:85006198400
SN - 1051-0117
SP - 1005
EP - 1008
JO - Proceedings - IEEE Ultrasonics Symposium
JF - Proceedings - IEEE Ultrasonics Symposium
M1 - 234266
T2 - 1991 IEEE Ultrasonics Symposium. ULTSYM 1991
Y2 - 8 December 1991 through 11 December 1991
ER -