Pressure-induced crossover from two- to three-dimensional magnetic correlations in La1.4Sr1.6Mn2O7 manganite

K. V. Kamenev; G. Balakrishnan; D. Mc K. Paul; G. J. Mcintyre

doi:10.1080/08957950211340

Pressure-induced crossover from two- to three-dimensional magnetic correlations in La_1.4Sr_1.6Mn₂O₇ manganite

K. V. Kamenev^*, G. Balakrishnan, D. Mc K. Paul, G. J. Mcintyre

^*Corresponding author for this work

School of Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

Magnetic pressure-temperature phase diagram of La_1.4Sr_1.6Mn₂O₇ layered manganese oxide has been studied by neutron diffraction. Three phases have been found in this compound at ambient pressure: high-temperature phase with quasi two-dimensional correlations of the magnetic moments on Mn sites and two low-temperature phases with long-range order - antiferromagnetic and ferromagnetic. Under hydrostatic pressure the antiferromagnetic phase is favoured with respect to the two-dimensional and long-range ferromagnetic phases. The magnetic phase with two-dimensional correlations is thus suppressed by the antiferromagnetic phase with long-range order. We discuss this result in terms of the pressure-induced electron transfer and compare our conclusions with predictions given by theoretical calculations.

Original language	English
Pages (from-to)	135-138
Number of pages	4
Journal	High Pressure Research
Volume	22
Issue number	1
DOIs	https://doi.org/10.1080/08957950211340
Publication status	Published - Apr 2002

Keywords / Materials (for Non-textual outputs)

Colossal magnetoresistance
High pressure
Layered manganese oxide
Low-dimensional magnetism
LAYERED PEROVSKITE STRUCTURE
MAGNETORESISTANCE

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10.1080/08957950211340

Cite this

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title = "Pressure-induced crossover from two- to three-dimensional magnetic correlations in La1.4Sr1.6Mn2O7 manganite",

abstract = "Magnetic pressure-temperature phase diagram of La1.4Sr1.6Mn2O7 layered manganese oxide has been studied by neutron diffraction. Three phases have been found in this compound at ambient pressure: high-temperature phase with quasi two-dimensional correlations of the magnetic moments on Mn sites and two low-temperature phases with long-range order - antiferromagnetic and ferromagnetic. Under hydrostatic pressure the antiferromagnetic phase is favoured with respect to the two-dimensional and long-range ferromagnetic phases. The magnetic phase with two-dimensional correlations is thus suppressed by the antiferromagnetic phase with long-range order. We discuss this result in terms of the pressure-induced electron transfer and compare our conclusions with predictions given by theoretical calculations.",

keywords = "Colossal magnetoresistance, High pressure, Layered manganese oxide, Low-dimensional magnetism, LAYERED PEROVSKITE STRUCTURE, MAGNETORESISTANCE",

author = "Kamenev, {K. V.} and G. Balakrishnan and Paul, {D. Mc K.} and Mcintyre, {G. J.}",

year = "2002",

month = apr,

doi = "10.1080/08957950211340",

language = "English",

volume = "22",

pages = "135--138",

journal = "High Pressure Research",

issn = "0895-7959",

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T1 - Pressure-induced crossover from two- to three-dimensional magnetic correlations in La1.4Sr1.6Mn2O7 manganite

AU - Kamenev, K. V.

AU - Balakrishnan, G.

AU - Paul, D. Mc K.

AU - Mcintyre, G. J.

PY - 2002/4

Y1 - 2002/4

N2 - Magnetic pressure-temperature phase diagram of La1.4Sr1.6Mn2O7 layered manganese oxide has been studied by neutron diffraction. Three phases have been found in this compound at ambient pressure: high-temperature phase with quasi two-dimensional correlations of the magnetic moments on Mn sites and two low-temperature phases with long-range order - antiferromagnetic and ferromagnetic. Under hydrostatic pressure the antiferromagnetic phase is favoured with respect to the two-dimensional and long-range ferromagnetic phases. The magnetic phase with two-dimensional correlations is thus suppressed by the antiferromagnetic phase with long-range order. We discuss this result in terms of the pressure-induced electron transfer and compare our conclusions with predictions given by theoretical calculations.

AB - Magnetic pressure-temperature phase diagram of La1.4Sr1.6Mn2O7 layered manganese oxide has been studied by neutron diffraction. Three phases have been found in this compound at ambient pressure: high-temperature phase with quasi two-dimensional correlations of the magnetic moments on Mn sites and two low-temperature phases with long-range order - antiferromagnetic and ferromagnetic. Under hydrostatic pressure the antiferromagnetic phase is favoured with respect to the two-dimensional and long-range ferromagnetic phases. The magnetic phase with two-dimensional correlations is thus suppressed by the antiferromagnetic phase with long-range order. We discuss this result in terms of the pressure-induced electron transfer and compare our conclusions with predictions given by theoretical calculations.

KW - Colossal magnetoresistance

KW - High pressure

KW - Layered manganese oxide

KW - Low-dimensional magnetism

KW - LAYERED PEROVSKITE STRUCTURE

KW - MAGNETORESISTANCE

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U2 - 10.1080/08957950211340

DO - 10.1080/08957950211340

M3 - Article

AN - SCOPUS:0348002027

SN - 0895-7959

VL - 22

SP - 135

EP - 138

JO - High Pressure Research

JF - High Pressure Research

IS - 1

ER -

Pressure-induced crossover from two- to three-dimensional magnetic correlations in La_1.4Sr_1.6Mn₂O₇ manganite

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Keywords / Materials (for Non-textual outputs)

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Pressure effect on physical properties of the layered manganite materials

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Pressure-induced crossover from two- to three-dimensional magnetic correlations in La1.4Sr1.6Mn2O7 manganite

Abstract

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Pressure effect on physical properties of the layered manganite materials

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Pressure-induced crossover from two- to three-dimensional magnetic correlations in La_1.4Sr_1.6Mn₂O₇ manganite