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Large lattice compression coefficient and uniaxial piezoresistance in CMR perovskite La1−XSrXMaO3 (0.15 ≤ x ≤ 0.25)

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Zeitschrift für Physik B Condensed Matter

Abstract

Using a method of in-situ pressing X-ray diffraction, a uniaxial pressure-induced unusual change of lattice parameters and a remarkable crystal structural distortion have been observed in the perovskite-type La-Sr-Mn-O system. The pressure coefficient of lattice parameter in [200] orientation, i.e. dlnd Mn-O-Mn/dP, can reach about 3.76 × 10−4/Map for La0.85Sr0.15MnO3. Under a uniaxial pressure of only 20 ∼ 30 20&30 MPa, a giant piezoresistance and an evident increase of Tp, the onset of the metal-semiconductor-like (M-S) transition have also been obtained. These effects suggest that the structure of colossal magnetoresistance perovskites is very flexible and their transport properties are structurally sensitive.

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Authors and Affiliations

  1. National Laboratory of Solid State Microstructures, Nanjing University, Nanjing, 210093, People’s Republic of China

    N. Zhang, W. P. Ding, Z. B. Guo, W. Zhong, D. Y. Xing & Y. W. Du

  2. Key Laboratory of Jiang Su Province for Optic & Electric Techniques, Nanjing Normal University, Nanjing, 210024, People’s Republic of China

    N. Zhang, G. Li & Y. Zheng

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  1. N. Zhang
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  2. W. P. Ding
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  3. Z. B. Guo
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  4. W. Zhong
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  5. D. Y. Xing
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  6. Y. W. Du
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  7. G. Li
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  8. Y. Zheng
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Zhang, N., Ding, W.P., Guo, Z.B. et al. Large lattice compression coefficient and uniaxial piezoresistance in CMR perovskite La1−XSrXMaO3 (0.15 ≤ x ≤ 0.25). Zeitschrift für Physik B Condensed Matter 102, 461–465 (1997). https://doi.org/10.1007/s002570050312

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  • DOI: https://doi.org/10.1007/s002570050312

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