%0 Journal Article
%A Qureshi, N.
%A Díaz, M. T. Fernández
%A Chapon, L. C.
%A Senyshyn, A.
%A Schweika, W.
%A Valldor, M.
%T Magnetic structure of the swedenborgite CaBa(Co$_3$Fe)O$_7$ derived by unpolarized neutron diffraction and spherical neutron polarimetry
%J Physical review / B
%V 97
%N 6
%@ 2469-9950
%C Woodbury, NY
%I Inst.
%M FZJ-2019-01713
%P 064404
%D 2018
%X 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.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000424628000004
%R 10.1103/PhysRevB.97.064404
%U https://juser.fz-juelich.de/record/861164