High-pressure studies of La0.25Ca0.75MnO3 using x-ray diffraction at the ESRF synchrotron

D. Levy; C. Meneghini

High-pressure studies of La_0.25Ca_0.75MnO₃ using x-ray diffraction at the ESRF synchrotron

D. Levy, C. Meneghini

University of Turin

Research output: Contribution to journal › Conference article › peer-review

Abstract

The interplay among magnetism, charge mobility and structure in manganese oxide perovskites present excited in the last few years large scientific interest. Nevertheless several aspects on the physics of those compounds remain unclear. The evolution of the structure of La_0.25Ca_0.75MnO₃ compounds as a function of pressure has been investigated by X-ray Powder diffraction in the high-pressure region, up to about 14 GPa. An anomalous and unexpected increasing of coherent Jahn-Teller distortions of MnO₆ octahedron has been observed raising the pressure over 7 GPa suggesting deeper investigation in this region of the phase diagram.

Original language	English
Pages (from-to)	534-538
Number of pages	5
Journal	Materials Science Forum
Volume	378-381
Issue number	II
State	Published - 2001
Externally published	Yes
Event	7th European Powder Diffraction Conference - Barcelona, Spain Duration: 20 May 2000 → 23 May 2000

Keywords

High pressure
Magneto resistance
Phase transition

Cite this

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title = "High-pressure studies of La0.25Ca0.75MnO3 using x-ray diffraction at the ESRF synchrotron",

abstract = "The interplay among magnetism, charge mobility and structure in manganese oxide perovskites present excited in the last few years large scientific interest. Nevertheless several aspects on the physics of those compounds remain unclear. The evolution of the structure of La0.25Ca0.75MnO3 compounds as a function of pressure has been investigated by X-ray Powder diffraction in the high-pressure region, up to about 14 GPa. An anomalous and unexpected increasing of coherent Jahn-Teller distortions of MnO6 octahedron has been observed raising the pressure over 7 GPa suggesting deeper investigation in this region of the phase diagram.",

keywords = "High pressure, Magneto resistance, Phase transition",

author = "D. Levy and C. Meneghini",

year = "2001",

language = "אנגלית",

volume = "378-381",

pages = "534--538",

journal = "Materials Science Forum",

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AU - Levy, D.

AU - Meneghini, C.

PY - 2001

Y1 - 2001

N2 - The interplay among magnetism, charge mobility and structure in manganese oxide perovskites present excited in the last few years large scientific interest. Nevertheless several aspects on the physics of those compounds remain unclear. The evolution of the structure of La0.25Ca0.75MnO3 compounds as a function of pressure has been investigated by X-ray Powder diffraction in the high-pressure region, up to about 14 GPa. An anomalous and unexpected increasing of coherent Jahn-Teller distortions of MnO6 octahedron has been observed raising the pressure over 7 GPa suggesting deeper investigation in this region of the phase diagram.

AB - The interplay among magnetism, charge mobility and structure in manganese oxide perovskites present excited in the last few years large scientific interest. Nevertheless several aspects on the physics of those compounds remain unclear. The evolution of the structure of La0.25Ca0.75MnO3 compounds as a function of pressure has been investigated by X-ray Powder diffraction in the high-pressure region, up to about 14 GPa. An anomalous and unexpected increasing of coherent Jahn-Teller distortions of MnO6 octahedron has been observed raising the pressure over 7 GPa suggesting deeper investigation in this region of the phase diagram.

KW - High pressure

KW - Magneto resistance

KW - Phase transition

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SN - 0255-5476

VL - 378-381

SP - 534

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JO - Materials Science Forum

JF - Materials Science Forum

IS - II

T2 - 7th European Powder Diffraction Conference

Y2 - 20 May 2000 through 23 May 2000

ER -

High-pressure studies of La_0.25Ca_0.75MnO₃ using x-ray diffraction at the ESRF synchrotron

Abstract

Keywords

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