Elastic modulus of LaFe4Sb12

Ishii I; Higaki H; Morita S; Mori I; Sugawara H; Yoshizawa M; Suzuki T

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Elastic modulus of LaFe4Sb12

机译：LaFe4Sb12的弹性模量

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In filled skutterudite compounds and clathrate compounds, guest atoms, which are accommodated in polyhedral cages, exhibit an anharmonic oscillation so-called the rattling motion. The rattling motion is suggested by inelastic neutron scattering experiments in filled skutterudite compound LaFe4Sb12. To investigate an influence of rattling motion of La atoms to the lattice system, we have measured temperature dependence of elastic modulus C-44 on a LaFe4Sb12 single-crystalline sample in the T range between 4.2 and 150 K for ultrasonic frequencies from 30 to 220MHz. We found ultrasonic frequency dependence in C-44, suggesting the rattling motion of La atoms between 30 and 80 K. We obtained a relaxation time 3.1 x 10(-11) s and an excitation energy similar to 300 K of the rattling motion. (c) 2007 Elsevier B.V. All rights reserved.

机译：在填充的方钴矿化合物和笼形化合物中，容纳在多面体笼中的客体原子表现出非谐振动，即所谓的咔嗒声。装填的方钴矿化合物LaFe4Sb12中的非弹性中子散射实验表明了晃动。为了研究La原子的不规则运动对晶格系统的影响，我们在30至220MHz的超声波频率下，测量了弹性模量C-44对LaFe4Sb12单晶样品在T和T范围介于4.2和150 K之间的温度依赖性。我们在C-44中发现了超声波频率依赖性，表明La原子在30至80 K之间发生了咔嗒声运动。我们获得了3.1 x 10（-11）s的弛豫时间和类似于300 K的咔嗒声。（c）2007 Elsevier B.V.保留所有权利。

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《Physica, B. Condensed Matter》 |2008年第9期|共3页
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Ishii I; Higaki H; Morita S; Mori I; Sugawara H; Yoshizawa M; Suzuki T;
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filled skutterudite; rattling motion; elastic modulus; ultrasonic frequency dependence; CEFE4SB12;

机译：填充方钴矿;棘爪运动;弹性模量;超声频率依赖性;CEFE4SB12;

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Elastic modulus of LaFe4Sb12

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