High-pressure structural analysis of (Nd, Sm)1/2Sr1/2MnO3: Origin for pressure-induced charge ordering

A. Kuriki; Y. Moritomo; A. Machida; E. Nishibori; M. Takata; M. Sakata; Y. Ohishi; O. Shimomura; A. Nakamura

High-pressure structural analysis of (Nd, Sm)_1/2Sr_1/2MnO₃: Origin for pressure-induced charge ordering

A. Kuriki, Y. Moritomo, A. Machida, E. Nishibori, M. Takata, M. Sakata, Y. Ohishi, O. Shimomura, A. Nakamura

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Abstract

Pressure effects on the structural parameters are investigated in a half-doped manganites (Nd_0.125Sm_0.875)_1/2Sr_1/2 MnO₃, by means of the synchrotron-radiation x-ray powder diffraction measurement. The compound shows a pressure-induced metal-insulator transition due to the subtle competition between the double-exchange interaction and the charge-ordering instability [Y. Tokura et al., Phys. Rev. Lett. 76, 3184 (1996)]. We have found that application of pressure induces the four-long and two-short deformation of the MnO₆ octahedra. We present a possible scenario for the pressure-induced charge-ordering.

Original language	English
Article number	113105
Pages (from-to)	1131051-1131054
Number of pages	4
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	65
Issue number	11
Publication status	Published - 2002 Mar 15

Cite this

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abstract = "Pressure effects on the structural parameters are investigated in a half-doped manganites (Nd0.125Sm0.875)1/2Sr1/2 MnO3, by means of the synchrotron-radiation x-ray powder diffraction measurement. The compound shows a pressure-induced metal-insulator transition due to the subtle competition between the double-exchange interaction and the charge-ordering instability [Y. Tokura et al., Phys. Rev. Lett. 76, 3184 (1996)]. We have found that application of pressure induces the four-long and two-short deformation of the MnO6 octahedra. We present a possible scenario for the pressure-induced charge-ordering.",

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AU - Kuriki, A.

AU - Moritomo, Y.

AU - Machida, A.

AU - Nishibori, E.

AU - Takata, M.

AU - Sakata, M.

AU - Ohishi, Y.

AU - Shimomura, O.

AU - Nakamura, A.

PY - 2002/3/15

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N2 - Pressure effects on the structural parameters are investigated in a half-doped manganites (Nd0.125Sm0.875)1/2Sr1/2 MnO3, by means of the synchrotron-radiation x-ray powder diffraction measurement. The compound shows a pressure-induced metal-insulator transition due to the subtle competition between the double-exchange interaction and the charge-ordering instability [Y. Tokura et al., Phys. Rev. Lett. 76, 3184 (1996)]. We have found that application of pressure induces the four-long and two-short deformation of the MnO6 octahedra. We present a possible scenario for the pressure-induced charge-ordering.

AB - Pressure effects on the structural parameters are investigated in a half-doped manganites (Nd0.125Sm0.875)1/2Sr1/2 MnO3, by means of the synchrotron-radiation x-ray powder diffraction measurement. The compound shows a pressure-induced metal-insulator transition due to the subtle competition between the double-exchange interaction and the charge-ordering instability [Y. Tokura et al., Phys. Rev. Lett. 76, 3184 (1996)]. We have found that application of pressure induces the four-long and two-short deformation of the MnO6 octahedra. We present a possible scenario for the pressure-induced charge-ordering.

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High-pressure structural analysis of (Nd, Sm)_1/2Sr_1/2MnO₃: Origin for pressure-induced charge ordering

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