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arxiv: cond-mat/0002009 · v1 · pith:T2JB5CXPnew · submitted 2000-02-01 · ❄️ cond-mat.str-el · cond-mat.supr-con

Observation of the cluster spin-glass phase in La_(2-x)Sr_(x)CuO₄ by anelastic spectroscopy

F. Cordero (1) , R. Cantelli (2) , A. Paolone (2) , M. Ferretti (3) ((1) CNR , Ist. Acustica , Roma , INFM , Italy
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(2) Univ. di Roma ``La Sapienza`` Dip. Fisica (3) Univ. Genova Dip. Chimica e Chimica Fisica Genova INFM Italy)
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classification ❄️ cond-mat.str-el cond-mat.supr-con
keywords absorptionacousticclustersanelasticantiferromagnetic-correlatedattributedchangesclose
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An increase of the acoustic absorption is found in La_{2-x}Sr_{x}CuO_{4} (x = 0.019, 0.03 and 0.06) close to the temperatures at which freezing of the spin fluctuations in antiferromagnetic-correlated clusters is expected to occur. The acoustic absorption is attributed to changes of the sizes of the quasi-frozen clusters induced by the vibration stress through magnetoelastic coupling.

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