Possible stripe phases in the multiple magnetization plateaus in TbB 4 from single-crystal neutron diffraction under pulsed high magnetic fields
Résumé
We present a single-crystal neutron diffraction study on the Shastry-Sutherland lattice system TbB4 at zero magnetic field and under pulsed high magnetic fields up to 35 T applied along the crystallographic c axis. While our results confirm the magnetic structures at zero field as well as those at the half- and full-magnetization plateaus, they offer insight into the 2/9- and 1/3-magnetization plateaus observed in this system. A stripe model of polarized 4-spin plaquettes whose stripe density proportionally increases with the macroscopic magnetization is in full agreement with the neutron diffraction data. Equally well-suited alternative models exist which explain the observed Bragg peaks being inherently limited in a pulsed high magnetic field experiment. We discuss the different intensity distributions in Q space which can be used to distinguish these models in future experiments.
Domaines
Matière Condensée [cond-mat]| Origine | Fichiers éditeurs autorisés sur une archive ouverte |
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