2024/09/12 by Otto Mustonen, Mustonen, Otto H. J., Charlotte Pughe +11
Materials Science · Physics and Astronomy · #Advanced Condensed Matter Physics #FOS: Physical sciences #Magnetic and transport properties of perovskites and related materials #Materials Science (cond-mat.mtrl-sci) #Multiferroics and related materials #Strongly Correlated Electrons (cond-mat.str-el)
paper · pdf · doi:10.48550/arxiv.2409.08323
openalex publication_date 2024/09/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We have investigated the magnetic diffuse scattering of isostructural S = 5/2 fcc antiferromagnets Ba2MnTeO6 and Ba2MnWO6 using polarized neutrons. Both materials display short-range correlated magnetism above their respective magnetic ordering temperatures of 20 K and 8 K. The spin correlations were analysed using a Reverse Monte Carlo approach. For Ba2MnTeO6, we find antiferromagnetic nearest-neighbor correlations along with ferromagnetic next-nearest neighbor correlations directly linked to the Type I order below TN. For Ba2MnWO6, both the nearest-neighbor and next-nearest-neighbor spin correlations are antiferromagnetic in the paramagnetic state. The short-range spin correlations persist up to T = 7TN. The magnetic diffuse scattering was also fitted using Onsager reaction-field theory allowing us to evaluate the magnetic interactions in these materials. We obtained J1 = -3.25(3) K and J2 = 0.41(2) K for Ba2MnTeO6 and J1 = -1.08(1) K and J2 = -0.88(1) K for Ba2MnWO6. These interactions are comparable to previous results from inelastic neutron scattering experiments below TN, which highlights the potential of the Onsager approach for the analysis of magnetic interactions.