Abstract
We report the magnetic properties of the -site spinel compound . The macroscopic magnetic measurements uncover successive magnetic transitions at K, followed by two further transitions at K and K. Neutron powder diffraction reveals that both and orders are associated with the propagation vector , while the magnetic structures are collinear amplitude modulated and helical, respectively. Using neutron powder spectroscopy we demonstrated the effect of substitution of S by Se on the magnetic exchange. The energy range of the spin-wave excitations is suppressed due to the chemical pressure of the ion in (, Se) spinels.
- Received 10 November 2021
- Revised 23 March 2022
- Accepted 25 March 2022
DOI:https://doi.org/10.1103/PhysRevB.105.174423
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