تقرير
Pseudo-easy-axis anisotropy in antiferromagnetic $S=1$ diamond-lattice systems
| العنوان: | Pseudo-easy-axis anisotropy in antiferromagnetic $S=1$ diamond-lattice systems |
|---|---|
| المؤلفون: | Vaidya, S., Hernández-Melián, A., Tidey, J. P., Curley, S. P. M., Sharma, S., Manuel, P., Wang, C., Hannaford, G. L., Blundell, S. J., Manson, Z. E., Manson, J. L., Singleton, J., Lancaster, T., Johnson, R. D., Goddard, P. A. |
| سنة النشر: | 2024 |
| المجموعة: | Condensed Matter |
| مصطلحات موضوعية: | Condensed Matter - Strongly Correlated Electrons |
| الوصف: | We investigate the magnetic properties of $S=1$ antiferromagnetic diamond lattice, Ni$X_{2}$(pyrimidine)$_{2}$ ($X$ = Cl, Br), hosting a single-ion anisotropy (SIA) orientation which alternates between neighbouring sites. Through neutron diffraction measurements of the $X$ = Cl compound, the ordered state spins are found to align collinearly along a pseudo-easy-axis, a unique direction created by the intersection of two easy planes. Similarities in the magnetization, exhibiting spin-flop transitions, and the magnetic susceptibility in the two compounds imply that the same magnetic structure and a pseudo-easy-axis is also present for $X$ = Br. We estimate the Hamiltonian parameters by combining analytical calculations and Monte-Carlo (MC) simulations of the spin-flop and saturation field. The MC simulations also reveal that the spin-flop transition occurs when the applied field is parallel to the pseudo-easy-axis. Contrary to conventional easy-axis systems, there exist field directions perpendicular to the pseudo-easy-axis for which the magnetic saturation is approached asymptotically and no symmetry-breaking phase transition is observed at finite fields. Comment: 9 pages, 8 figures |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2405.15623 |
| رقم الأكسشن: | edsarx.2405.15623 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |