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arxiv: 1107.1165 · v1 · pith:JWY2P5A2new · submitted 2011-07-06 · ❄️ cond-mat.str-el

Eu2+ spin dynamics in the filled skutterudites EuM4Sb12 (M = Fe, Ru, Os)

F. A. Garcia , C. Adriano , G. G. Cabrera , L. M. Holanda , P. G. Pagliuso , M. A. Avila , S. B. Oseroff , C. Rettori This is my paper
classification ❄️ cond-mat.str-el
keywords dynamicsspinmotionrattlingactivationatomsbeta-eu8ga16ge30cage
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We report evidence for a close relation between the thermal activation of the rattling motion of the filler guest atoms, and inhomogeneous spin dynamics of the Eu2+ spins. The spin dynamics is probed directly by means of Eu2+ electron spin resonance (ESR), performed in both X-band (9.4 GHz) and Q-band (34 GHz) frequencies in the temperature interval 4.2 < T < 300 K. A comparative study with ESR measurements on the Beta-Eu8Ga16Ge30 clathrate compound is presented. Our results point to a correlation between the rattling motion and the spin dynamics which may be relevant for the general understanding of the dynamics of cage systems.

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