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ESR study in lightly doped La(1-x)Sr(x)MnO(3)

V. A. Ivanshin, J. Deisenhofer, H. -A. Krug von Nidda, A. Loidl, A. A. Mukhin, A. M. Balbashov, M. V. Eremin

cond-mat.str-elarXiv:cond-mat/9908112

Abstract

This is the first systematic ESR investigation of La(1-x)Sr(x)MnO(3) single crystals for Sr concentrations x < 0.2. The rich phase diagram of this compound, which is dominated by the Jahn-Teller effect of Mn(3+), is a matter of actual interest in connection with giant magnetoresistance phenomena. The ESR signal, which is due to both Mn(3+) and Mn(4+), directely probes the suppression of the Jahn-Teller distortion with increasing Sr concentration and reveals all characteristic structural and magnetic phase transitions.

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