Non-collinear magnetic structures in the magnetoelectric Swedenborgite CaBaFe4O7 derived by powder and single-crystal neutron diffraction
N. Qureshi, B. Ouladdiaf, A. Senyshyn, V. Caignaert, M. Valldor
SciPost Phys. Core 5, 007 (2022) · published 3 February 2022
We have investigated the magnetic structures of the Swedenborgite compound CaBaFe4O7 using magnetic susceptibility and neutron diffraction experiments on powder and single-crystal samples. Below TN1 = 274 K the system orders in a ferrimagnetic structure with spins along the c axis and an additional antiferromagnetic component within the kagome plane which obviously cannot satisfy all exchange interactions. Competing single-ion anisotropy and exchange interactions lead to a transition into a multi-q conical structure at TN2 = 202 K. The derivation of the complex ordering scheme below TN2 is an important step towards the understanding of the magnetoelectric effect under magnetic fields in this polar ferrimagnet.
Authors / Affiliations: mappings to Contributors and OrganizationsSee all Organizations.
- 1 2 Navid Qureshi,
- 2 Bachir Ouladdiaf,
- 3 Anatoliy Senyshyn,
- 4 Vincent Caignaert,
- 1 5 Martin Björn Valldor
- 1 Universität zu Köln / University of Cologne [UoC]
- 2 Institut Laue-Langevin [ILL]
- 3 Technische Universität München / Technical University of Munich [TUM]
- 4 Laboratoire de Cristallographie et Sciences des Matériaux [CRISMAT]
- 5 Universitetet i Oslo / University of Oslo [UiO]