Temperature-Dependent X-Ray Absorption Spectroscopy of Colossal Magnetoresistive Perovskites

N. Mannella , A. Rosenhahn , M. Watanabe , B. Sell , A. Nambu , S. Ritchey , E. Arenholz , A. Young

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Y. Tomioka C.S. Fadley

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classification ❄️ cond-mat.str-el cond-mat.mtrl-sci

keywords absorptiondifferentdistortionsperovskitespre-edgespectratemperaturex-ray

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The temperature dependence of the O K-edge pre-edge structure in the x-ray absorption spectra of the perovskites La(1-x)A(x)MnO(3), (A = Ca, Sr; x = 0.3, 0.4) reveals a correlation between the disappearance of the splitting in the pre-edge region and the presence of Jahn-Teller distortions. The different magnitudes of the distortions for different compounds is proposed to explain some dissimilarity in the line shape of the spectra taken above the Curie temperature.

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Temperature-Dependent X-Ray Absorption Spectroscopy of Colossal Magnetoresistive Perovskites

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