Volume 110, Number 3, May 2015
|Number of page(s)||6|
|Section||Condensed Matter: Electronic Structure, Electrical, Magnetic and Optical Properties|
|Published online||20 May 2015|
Spin-lattice coupling and frustrated magnetism in Fe-doped hexagonal LuMnO3
1 Highly Correlated Matter Research Group, Physics Department, University of Johannesburg P. O. Box 524, Auckland Park 2006, South Africa
2 Jülich Centre for Neutron Science JCNS, Outstation at MLZ, Forschungszentrum Jülich GmbH Lichtenberg Straße 1, D-85747 Garching, München, Germany
3 Jülich Centre for Neutron Science JCNS, Outstation at SNS, Oak Ridge National Laboratory Oak Ridge, TN 37831, USA
4 Chemical and Engineering Materials Division, Oak Ridge National Laboratory - Oak Ridge, TN 37831, USA
5 Laboratory for Neutron Scattering, Paul Scherrer Institute - CH-5232 Villigen, Switzerland
6 Jülich Centre for Neutron Science JCNS and Peter Grünberg Institute PGI, JARA-FIT, Forschungszentrum Jülich GmbH - D-52425 Jülich, Germany
7 Institut Laue-Langevin - BP 156, F-38042 Grenoble Cedex 9, France
8 Max Planck Institute for Chemical Physics of Solids - Nöthnitzerstraße 40, D-01187 Dresden, Germany
Received: 19 January 2015
Accepted: 28 April 2015
Strong spin-lattice coupling and prominent frustration effects observed in the 50% Fe-doped frustrated hexagonal are reported. A Néel transition at and a possible spin re-orientation transition at are observed in the magnetization data. From neutron powder diffraction data, the nuclear structure at and below 300 K was refined in polar P63cm space group. While the magnetic structure of LuMnO3 belongs to the representation, that of LuFe0.5Mn0.5O3 belongs to which is supported by the strong intensity for the (100) reflection and also judging by the presence of spin-lattice coupling. The refined atomic positions for Lu and Mn/Fe indicate significant atomic displacements at and which confirms strong spin-lattice coupling. Our results complement the discovery of room temperature multiferroicity in thin films of and would give impetus to study LuFe1−xMnxO3 systems as potential multiferroics where electric polarization is linked to giant atomic displacements.
PACS: 75.85.+t – Magnetoelectric effects, multiferroics / 75.50.Ee – Antiferromagnetics / 75.25.-j – Spin arrangements in magnetically ordered materials (including neutron and spin-polarized electron studies, synchrotron-source x-ray scattering, etc.)
© EPLA, 2015
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