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Combining d^n (magnetic) and d^0 (lone pair) ions in frustrated low-dimensional magnetic arrangements: a fruitful route for ferroelectricity?

English title Combining dn (magnetic) and d0 (lone pair) ions in frustrated low-dimensional magnetic arrangements: a fruitful route for ferroelectricity?
Applicant Zaharko Oksana
Number 129899
Funding scheme Project funding (Div. I-III)
Research institution Paul Scherrer Institut
Institution of higher education Paul Scherrer Institute - PSI
Main discipline Condensed Matter Physics
Start/End 01.10.2010 - 31.10.2011
Approved amount 113'113.00
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Keywords (3)

multiferroics; low dimensional magnetism; new materials

Lay Summary (English)

Lead
Lay summary
Ferroelectric magnets remain at the forefront of research because of promising important applications and due to the rich physics involved. We propose to investigate a new route allowing to achieve a strong coupling between magnetism and ferroelectricity. We want to link frustrated low-dimensional magnetic units with d^n ions by exchange bridges with d^0 ions possessing polarizable lone-pair electrons. Two systems are in our focus: layered geometrically frustrated cluster FeTe2O5Br compound and Kagome-like francisite Cu3Bi(MO3)2X (M=Te, Se, X= Cl, Br, I). The first steps in the investigation of FeTe2O5Br delivered very interesting results and need to be continued. The information on Cu3Bi(MO3)2X is limited, but promising. We plan to extend it by bulk measurements, x-ray and neutron scattering.
Direct link to Lay Summary Last update: 21.02.2013

Responsible applicant and co-applicants

Employees

Publications

Publication
Multiferroic FeTe2O5Br: Alternating spin chains with frustrated interchain interactions
Pregelj M, Jeschke HO, Feldner H, Valenti R, Honecker A, Saha-Dasgupta T, Das H, Yoshii S, Morioka T, Nojiri H, Berger H, Zorko A, Zaharko O, Arcon D (2012), Multiferroic FeTe2O5Br: Alternating spin chains with frustrated interchain interactions, in PHYSICAL REVIEW B, 86(5), 054402-1-054402-6.

Scientific events

Active participation

Title Type of contribution Title of article or contribution Date Place Persons involved
5th European Conference on Neutron Scattering 17.07.2011 Prague, Czach Republic


Knowledge transfer events

Active participation

Title Type of contribution Date Place Persons involved
5th European Conference on Neutron Scattering 17.07.2011 Prague, Czech Republic


Associated projects

Number Title Start Funding scheme
140862 Quantum Frustration in Model Magnets 01.07.2012 Project funding (Div. I-III)

Abstract

Ferroelectric magnets remain at the forefront of research because of promising important applications and due to the rich physics involved. We propose to investigate a new route allowing to achieve a strong coupling between magnetism and ferroelectricity. We want to link frustrated low-dimensional magnetic units with d^n ions by exchange bridges with d^0 ions possessing polarizable lone-pair electrons. Two systems are in our focus: layered geometrically frustrated cluster FeTe2O5Br compound and Kagome-like francisite Cu3Bi(MO3)2X (M=Te, Se, X= Cl, Br, I). The first steps in the investigation of FeTe2O5Br delivered very interesting results and need to be continued. The information on Cu3Bi(MO3)2X is limited, but promising. We shall extend it by bulk measurements, x-ray and neutron scattering.
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