UNSPECIFIED (2002) Pressure-induced crossover from two- to three-dimensional magnetic correlations in La1.4Sr1.6Mn2O7 manganite. In: 39th European High Pressure Research Group Meeting on Advanves on High Pressure Research (EHPRHG'39), SANTANDER, SPAIN, SEP 16-19, 2001. Published in: HIGH PRESSURE RESEARCH, 22 (1 Sp. Iss. SI). pp. 135-138.

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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 anti ferromagnetic 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.

Item Type:	Conference Item (UNSPECIFIED)
Subjects:	Q Science > QC Physics
Journal or Publication Title:	HIGH PRESSURE RESEARCH
Publisher:	TAYLOR & FRANCIS LTD
ISSN:	0895-7959
Date:	April 2002
Volume:	22
Number:	1 Sp. Iss. SI
Number of Pages:	4
Page Range:	pp. 135-138
Identification Number:	10.1080/08957950290003076
Publication Status:	Published
Title of Event:	39th European High Pressure Research Group Meeting on Advanves on High Pressure Research (EHPRHG'39)
Location of Event:	SANTANDER, SPAIN
Date(s) of Event:	SEP 16-19, 2001
URI:	http://wrap.warwick.ac.uk/id/eprint/10775

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