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Magnetoelastic Anomalies and Suppression of Jahn-Teller Distortions in La_{1-x}Sr_{x}MnO_{3} by Pulsed Magnetic Fields

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Kadomtseva A., Popov Y., Vorob'ev G., Kamilov K., Ivanov V., Mukhin A., Balbashov A.

Acta Physica Polonica A

2000

vol. 97

issue 3

599-602

Thermal expansion Δl/l(T) and magnetostriction λ_{∥, ⊥ }(H,T) in the pulsed magnetic fields H up to 250 kOe were studied in the single La_{1-x}Sr_{x}MnO_{3} crystals (x=0.1, 0 .125, and 0.15) at temperatures T=10-320 K. Anomalies in the Δl/l (T) curves were observed near a charge (polaron) ordering (T_{p}) and structural transitions between orthorhombic Jahn-Teller distorted O' phase and high temperature orthorhombic (pseudocubic) O^{*} one (T'_{s}). A noticeable increase in the field-induced magnetostriction λ_{∥, ⊥ }(H) was revealed in the O' phase at T_{p}

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1 Acta Physica Polonica A

1 2000

1 Balbashov A.

1 Ivanov V.

1 Kadomtseva A.

1 Kamilov K.

1 Mukhin A.

1 Popov Y.

1 Vorob'ev G.

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Magnetoelastic Anomalies and Suppression of Jahn-Teller Distortions in La_{1-x}Sr_{x}MnO_{3} by Pulsed Magnetic Fields