Speaker
Description
YbBO₃ is an intriguing example of a geometrically frustrated magnet. Early muon spin spectroscopy study reported an increase in the muon depolarization rate below 400 mK, but no oscillations indicative of long-range order were detected [1]. In contrast, subsequent investigations using other experimental techniques revealed that YbBO₃ does indeed undergo magnetic ordering [2]. A recent proposal suggested that inadequate thermalization in µSR experiments—addressable by mixing the sample with silver powder—might explain the discrepancy [3]. We revisited the µSR measurements using YbBO₃ samples mixed with Ag powder to enhance thermal coupling. We will present results that show signatures of magnetic order, reconciling previous inconsistencies and providing a clear picture of the low-temperature magnetic ground state of YbBO₃.
[1] Somesh et al., Phys. Rev. B 107, 064421 (2023)
[2] Sala et al., Sala et al., J. Phys.: Condens. Matter 35 395804 (2023)
[3] Treu et al., J. Phys.: Condens. Matter 37 013001 (2025)
| gediminas.simutis@psi.ch |
