Otto H. J. Mustonen, Charlotte E. Pughe, Lucile Mangin-Thro, Robert Tarver, Heather M. Mutch, Helen C. Walker, Edmund J. Cussen
{"title":"Magnetic diffuse scattering of the $S$ = 5/2 fcc antiferromagnets Ba$_2$MnTeO$_6$ and Ba$_2$MnWO$_6$","authors":"Otto H. J. Mustonen, Charlotte E. Pughe, Lucile Mangin-Thro, Robert Tarver, Heather M. Mutch, Helen C. Walker, Edmund J. Cussen","doi":"arxiv-2409.08323","DOIUrl":null,"url":null,"abstract":"We have investigated the magnetic diffuse scattering of isostructural $S$ =\n5/2 fcc antiferromagnets Ba$_2$MnTeO$_6$ and Ba$_2$MnWO$_6$ using polarized\nneutrons. Both materials display short-range correlated magnetism above their\nrespective magnetic ordering temperatures of 20 K and 8 K. The spin\ncorrelations were analysed using a Reverse Monte Carlo approach. For\nBa$_2$MnTeO$_6$, we find antiferromagnetic nearest-neighbor correlations along\nwith ferromagnetic next-nearest neighbor correlations directly linked to the\nType I order below $T_N$. For Ba$_2$MnWO$_6$, both the nearest-neighbor and\nnext-nearest-neighbor spin correlations are antiferromagnetic in the\nparamagnetic state. The short-range spin correlations persist up to $T$ =\n7$T_N$. The magnetic diffuse scattering was also fitted using Onsager\nreaction-field theory allowing us to evaluate the magnetic interactions in\nthese materials. We obtained $J_1$ = -3.25(3) K and $J_2$ = 0.41(2) K for\nBa$_2$MnTeO$_6$ and $J_1$ = -1.08(1) K and $J_2$ = -0.88(1) K for\nBa$_2$MnWO$_6$. These interactions are comparable to previous results from\ninelastic neutron scattering experiments below $T_N$, which highlights the\npotential of the Onsager approach for the analysis of magnetic interactions.","PeriodicalId":501171,"journal":{"name":"arXiv - PHYS - Strongly Correlated Electrons","volume":"30 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"arXiv - PHYS - Strongly Correlated Electrons","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/arxiv-2409.08323","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 0
Abstract
We have investigated the magnetic diffuse scattering of isostructural $S$ =
5/2 fcc antiferromagnets Ba$_2$MnTeO$_6$ and Ba$_2$MnWO$_6$ 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
Ba$_2$MnTeO$_6$, we find antiferromagnetic nearest-neighbor correlations along
with ferromagnetic next-nearest neighbor correlations directly linked to the
Type I order below $T_N$. For Ba$_2$MnWO$_6$, both the nearest-neighbor and
next-nearest-neighbor spin correlations are antiferromagnetic in the
paramagnetic state. The short-range spin correlations persist up to $T$ =
7$T_N$. The magnetic diffuse scattering was also fitted using Onsager
reaction-field theory allowing us to evaluate the magnetic interactions in
these materials. We obtained $J_1$ = -3.25(3) K and $J_2$ = 0.41(2) K for
Ba$_2$MnTeO$_6$ and $J_1$ = -1.08(1) K and $J_2$ = -0.88(1) K for
Ba$_2$MnWO$_6$. These interactions are comparable to previous results from
inelastic neutron scattering experiments below $T_N$, which highlights the
potential of the Onsager approach for the analysis of magnetic interactions.