Abstract
We report a synthesis method, and structural and magnetic characterization, for the fluoroperovskite . We have developed a wet-chemical method that allows preparation of large volumes of air-sensitive fluoroperovskites with high purity. has a Néel temperature () of 90 K and a Weiss constant () of −124 K, corresponding to dominant antiferromagnetic interactions. Below , a slight difference is observed between zero-field and field-cooled samples, indicating spin canting and weak ferromagnetism. AC magnetometry supports that weak ferromagnetism is inherent to and not due to an impurity. From powder neutron diffraction data, we describe the magnetic structure precisely as a weakly canted G-type (magnetic space group ). A ferromagnetic component is allowed in , however, this component is too small to be confirmed on the basis of powder neutron diffraction data and may be absent in zero magnetic fields.
2 More- Received 21 July 2020
- Revised 14 October 2020
- Accepted 29 October 2020
DOI:https://doi.org/10.1103/PhysRevMaterials.4.114412
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