Polaron lifetime in La0.75Ca0.25MnO3

N. Wakabayashi; S. Shimomura; P. Dai; J. A. Fernandez-Baca; Y. Tomioka; Y. Tokura

doi:10.1007/s003390201848

Polaron lifetime in La_0.75Ca_0.25MnO₃

N. Wakabayashi, S. Shimomura, P. Dai, J. A. Fernandez-Baca, Y. Tomioka, Y. Tokura

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Abstract

As part of continuing effort to accurately characterize the nature of the polaron in perovskite manganese oxides, quasielastic neutron scattering measurements were performed on a single-crystal sample of La_0.75Ca_0.25MnO₃. Energy scans at the wavevector for the short-range correlation peak in the paramagnetic insulator phase show that the line widths are resolution-limited at all temperatures. In contrast, the line width of the diffuse part of the scattering due to uncorrelated polarons was found to be much larger, as large as 4 meV (FWHM), and of the same order of magnitude as that of magnetic scattering. Results of the measurements are interpreted on the basis of a scattering function consisting of terms for isolated polarons and for polarons in clusters.

Original language	English
Pages (from-to)	S1782-S1784
Journal	Applied Physics A: Materials Science and Processing
Volume	74
Issue number	SUPPL.II
DOIs	https://doi.org/10.1007/s003390201848
State	Published - Dec 2002

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title = "Polaron lifetime in La0.75Ca0.25MnO3",

abstract = "As part of continuing effort to accurately characterize the nature of the polaron in perovskite manganese oxides, quasielastic neutron scattering measurements were performed on a single-crystal sample of La0.75Ca0.25MnO3. Energy scans at the wavevector for the short-range correlation peak in the paramagnetic insulator phase show that the line widths are resolution-limited at all temperatures. In contrast, the line width of the diffuse part of the scattering due to uncorrelated polarons was found to be much larger, as large as 4 meV (FWHM), and of the same order of magnitude as that of magnetic scattering. Results of the measurements are interpreted on the basis of a scattering function consisting of terms for isolated polarons and for polarons in clusters.",

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T1 - Polaron lifetime in La0.75Ca0.25MnO3

AU - Wakabayashi, N.

AU - Shimomura, S.

AU - Dai, P.

AU - Fernandez-Baca, J. A.

AU - Tomioka, Y.

AU - Tokura, Y.

PY - 2002/12

Y1 - 2002/12

N2 - As part of continuing effort to accurately characterize the nature of the polaron in perovskite manganese oxides, quasielastic neutron scattering measurements were performed on a single-crystal sample of La0.75Ca0.25MnO3. Energy scans at the wavevector for the short-range correlation peak in the paramagnetic insulator phase show that the line widths are resolution-limited at all temperatures. In contrast, the line width of the diffuse part of the scattering due to uncorrelated polarons was found to be much larger, as large as 4 meV (FWHM), and of the same order of magnitude as that of magnetic scattering. Results of the measurements are interpreted on the basis of a scattering function consisting of terms for isolated polarons and for polarons in clusters.

AB - As part of continuing effort to accurately characterize the nature of the polaron in perovskite manganese oxides, quasielastic neutron scattering measurements were performed on a single-crystal sample of La0.75Ca0.25MnO3. Energy scans at the wavevector for the short-range correlation peak in the paramagnetic insulator phase show that the line widths are resolution-limited at all temperatures. In contrast, the line width of the diffuse part of the scattering due to uncorrelated polarons was found to be much larger, as large as 4 meV (FWHM), and of the same order of magnitude as that of magnetic scattering. Results of the measurements are interpreted on the basis of a scattering function consisting of terms for isolated polarons and for polarons in clusters.

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JO - Applied Physics A: Materials Science and Processing

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IS - SUPPL.II

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Polaron lifetime in La_0.75Ca_0.25MnO₃

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