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Thermal Diffusivity of La1−x Sr x MnO3 (x < 0.3)

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Abstract

Perovskite manganites are interesting because of their colossal magnetoresistance. In this work high resolution thermal diffusivity measurements of La1−x Sr x MnO3 (0 ≤ x ≤ 0.3) single crystals in the temperature range from 250 to 400 K are presented. A photopyroelectric device in the standard back configuration has been used. The thermal diffusivity through second-order magnetic phase transitions, as well as through first- and second-order structural phase transitions has been measured. The critical parameters of the sample with x = 0.3 at the ferromagnetic-to-paramagnetic transition have been obtained, and are close to the values predicted by the Ising model.

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Authors and Affiliations

  1. Departamento de Fíesica Aplicada I, Escuela Superior de Ingenieros, Universidad del PaísVasco, Alameda Urquijo s/n, 48013, Bilbao, Spain

    A. Salazar & A. Oleaga

  2. Clarendon Laboratory, Department of Physics, University of Oxford, Oxford, OX1 3PU, United Kingdom

    D. Prabhakaran

Authors
  1. A. Salazar
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  2. A. Oleaga
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  3. D. Prabhakaran
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Salazar, A., Oleaga, A. & Prabhakaran, D. Thermal Diffusivity of La1−x Sr x MnO3 (x < 0.3). International Journal of Thermophysics 25, 1269–1279 (2004). https://doi.org/10.1023/B:IJOT.0000038515.61986.65

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  • DOI: https://doi.org/10.1023/B:IJOT.0000038515.61986.65

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