The Library
Coupling between spin and charge order driven by magnetic field in triangular Ising system LuFe2O4+δ
Tools
Ding, Lei, Orlandi, Fabio, Khalyavin, Dmitry, Boothroyd, Andrew, Prabhakaran, Dharmalingam, Balakrishnan, Geetha and Manuel, Pascal (2018) Coupling between spin and charge order driven by magnetic field in triangular Ising system LuFe2O4+δ. Crystals, 8 (2). 88. doi:10.3390/cryst8020088 ISSN 2073-4352.
|
PDF
WRAP-coupling-spin-charge-order-driven-magnetic-field-triangular-Ising-system-Balakrishnan-2018.pdf - Published Version - Requires a PDF viewer. Available under License Creative Commons Attribution 4.0. Download (5Mb) | Preview |
Official URL: http://dx.doi.org/10.3390/cryst8020088
Abstract
We present a study of the magnetic-field effect on spin correlations in the charge ordered triangular Ising system LuFe2O4+δ through single crystal neutron diffraction. In the absence of a magnetic field, the strong diffuse neutron scattering observed below the Neel temperature (TN = 240 K) indicates that LuFe2O4+δ shows short-range, two-dimensional (2D) correlations in the FeO5 triangular layers, characterized by the development of a magnetic scattering rod along the 1/3 1/3 L direction, persisting down to 5 K.We also found that on top of the 2D correlations, a long range ferromagnetic component associated with the propagation vector k1 = 0 sets in at around 240 K. On the other hand, an external magnetic field applied along the c-axis effectively favours a three-dimensional (3D) spin correlation between the FeO5 bilayers evidenced by the increase of the intensity of satellite reflections with propagation vector k2 = (1/3, 1/3, 3/2). This magnetic modulation is identical to the charge ordered superstructure, highlighting the field-promoted coupling between the spin and charge degrees of freedom. Formation of the 3D spin correlations suppresses both the rod-type diffuse scattering and the k1 component. Simple symmetry-based arguments provide a natural explanation of the observed phenomenon and put forward a possible charge redistribution in the applied magnetic field.
Item Type: | Journal Article | ||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Subjects: | Q Science > QC Physics Q Science > QD Chemistry |
||||||||||||
Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||||||
Library of Congress Subject Headings (LCSH): | Crystallography, Magnetic structure, Neutrons -- Diffraction, Nuclear spin | ||||||||||||
Journal or Publication Title: | Crystals | ||||||||||||
Publisher: | M D P I AG | ||||||||||||
ISSN: | 2073-4352 | ||||||||||||
Official Date: | 6 February 2018 | ||||||||||||
Dates: |
|
||||||||||||
Volume: | 8 | ||||||||||||
Number: | 2 | ||||||||||||
Article Number: | 88 | ||||||||||||
DOI: | 10.3390/cryst8020088 | ||||||||||||
Status: | Peer Reviewed | ||||||||||||
Publication Status: | Published | ||||||||||||
Access rights to Published version: | Open Access (Creative Commons) | ||||||||||||
Date of first compliant deposit: | 11 June 2018 | ||||||||||||
Date of first compliant Open Access: | 12 June 2018 | ||||||||||||
RIOXX Funder/Project Grant: |
|
||||||||||||
Open Access Version: |
Request changes or add full text files to a record
Repository staff actions (login required)
View Item |
Downloads
Downloads per month over past year