Otto H. J. Mustonen, Charlotte E. Pughe, Lucile Mangin-Thro, Robert Tarver, Heather M. Mutch, Helen C. Walker, Edmund J. Cussen
{"title":"S$ = 5/2 fcc 反铁磁体 Ba$_2$MnTeO$_6$ 和 Ba$_2$MnWO$_6$ 的磁扩散散射","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":"{\"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}","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
摘要
我们利用偏振中子研究了等结构 $S$ =5/2 fcc 反铁磁体 Ba$_2$MnTeO$_6$ 和 Ba$_2$MnWO$_6$ 的磁扩散散射。这两种材料在各自的磁有序温度 20 K 和 8 K 以上都显示出短程相关磁性。对于 Ba$_2$MnTeO$_6$,我们发现反铁磁近邻相关性以及铁磁近邻相关性与低于 $T_N$ 的 I 型有序直接相关。对于 Ba$_2$MnWO$_6$ 来说,在顺磁态下,最近邻和最近邻自旋相关性都是反铁磁的。短程自旋相关性一直持续到 $T$ =7$T_N$ 。磁扩散散射也用昂萨格反应场理论进行了拟合,使我们能够评估这些材料中的磁相互作用。我们得到了 Ba$_2$MnTeO$_6$ 的 $J_1$ = -3.25(3) K 和 $J_2$ = 0.41(2) K,以及 Ba$_2$MnWO$_6$ 的 $J_1$ = -1.08(1) K 和 $J_2$ = -0.88(1) K。这些相互作用与以前在低于 $T_N$ 的非弹性中子散射实验中得出的结果相当,这突出了昂萨格方法在分析磁性相互作用方面的潜力。
Magnetic diffuse scattering of the $S$ = 5/2 fcc antiferromagnets Ba$_2$MnTeO$_6$ and Ba$_2$MnWO$_6$
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.