Universität zu Köln

Qureshi, N., Diaz, M. T. Fernandez, Chapon, L. C., Senyshyn, A., Schweika, W. and Valldor, M. (2018). Magnetic structure of the swedenborgite CaBa(Co3Fe)O-7 derived by unpolarized neutron diffraction and spherical neutron polarimetry. Phys. Rev. B, 97 (6). COLLEGE PK: AMER PHYSICAL SOC. ISSN 2469-9969

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Abstract

We present a study that combines polarized and unpolarized neutrons to derive the magnetic structure of the swedenborgite compound CaBa(Co3Fe)O-7. 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 themagnetic superspace symmetry P2(1)' and it consists of spins rotating around an axis close to the [110] direction. Due to the propagation vector q = (1/300), this modulation has cycloidal and helicoidal character rendering this system a potential multiferroic. The resulting spin configuration can be mapped onto the classical root 3 x root 3 structure of a kagome lattice, and it indicates an important interplay between the kagome and the triangular layers of the crystal structure.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Qureshi, N. UNSPECIFIED UNSPECIFIED UNSPECIFIED Diaz, M. T. Fernandez UNSPECIFIED UNSPECIFIED UNSPECIFIED Chapon, L. C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Senyshyn, A. UNSPECIFIED UNSPECIFIED UNSPECIFIED Schweika, W. UNSPECIFIED UNSPECIFIED UNSPECIFIED Valldor, M. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-196089
DOI:	10.1103/PhysRevB.97.064404
Journal or Publication Title:	Phys. Rev. B
Volume:	97
Number:	6
Date:	2018
Publisher:	AMER PHYSICAL SOC
Place of Publication:	COLLEGE PK
ISSN:	2469-9969
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language TEMPERATURE Multiple languages Materials Science, Multidisciplinary; Physics, Applied; Physics, Condensed Matter Multiple languages
Refereed:	Yes
URI:	http://kups.ub.uni-koeln.de/id/eprint/19608