Journal Article

FZJ-2019-01713

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Magnetic structure of the swedenborgite CaBa(Co$_3$Fe)O$_7$ derived by unpolarized neutron diffraction and spherical neutron polarimetry

Qureshi, N. (Corresponding author) ; Díaz, M. T. F. ; Chapon, L. C. ; Senyshyn, A. ; Schweika, W.FZJ* ; Valldor, M.

2018
Inst. Woodbury, NY

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Please use a persistent id in citations: http://hdl.handle.net/2128/21765  doi:10.1103/PhysRevB.97.064404

Abstract: We present a study that combines polarized and unpolarized neutrons to derive the magnetic structure of the swedenborgite compound CaBa(Co3Fe)O7. Integrated intensities from a standard neutron diffraction experiment and polarization matrices from spherical neutron polarimetry have been simultaneously analyzed revealing a complex order, which differs from the usual spin configurations on a kagome lattice. We find that the magnetic structure is well described by a combination of two one-dimensional representations corresponding to the magnetic superspace symmetry P2′1, and it consists of spins rotating around an axis close to the [110] direction. Due to the propagation vector q=(1300), this modulation has cycloidal and helicoidal character rendering this system a potential multiferroic. The resulting spin configuration can be mapped onto the classical √3×√3 structure of a kagome lattice, and it indicates an important interplay between the kagome and the triangular layers of the crystal structure.

Keyword(s): Magnetic Materials (1st) ; Magnetism (2nd)

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Contributing Institute(s):

1. Neutronenstreuung (ICS-1)
2. Neutronenstreuung (Neutronenstreuung ; JCNS-1)
3. JCNS-FRM-II (JCNS-FRM-II)

Research Program(s):

1. 551 - Functional Macromolecules and Complexes (POF3-551) (POF3-551)
2. 6G4 - Jülich Centre for Neutron Research (JCNS) (POF3-623) (POF3-623)
3. 6215 - Soft Matter, Health and Life Sciences (POF3-621) (POF3-621)

Experiment(s):

1. DNS: Diffuse scattering neutron time of flight spectrometer (NL6S)
2. SPODI: High resolution powder diffractometer (SR8a)

Appears in the scientific report 2019

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Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index ; Science Citation Index Expanded ; Web of Science Core Collection

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