Critical Slowing Down in Zn-Mg-Ho Quasicrystal

Jun Sugiyama, Hiroshi Nozaki, Eduardo J. Ansaldo, Gerald D. Morris, Jess H. Brewer, Taku J. Sato

Research output: Contribution to journalConference articlepeer-review

1 Citation (Scopus)


By means of longitudinal field muon-spin spectroscopy, we have found a clear critical slowing down caused by spin fluctuation of Ho moments in the icosahedral quasicrystal (QC), i-ZnMgHo, with freezing temperature (Tf =1.95 K), for which the susceptibility showed an anomaly at5K. The difference is attributed to crystalline elec-tric field (CEF) effects. The muons experience a broad, fluctuating, field distribution, of width Δ ∼6.3 T around Tf. The effect of the CEF is also apparent in zero field and weak applied transverse field measurements, with an onset around 60 K. For the Cd-based QCs (CdMgHo and CdMgGd), which exhibited two freezing temperatures in the susceptibility, the change in fluctuation rate, i.e. freezing, occurs at the lower Tf.

Original languageEnglish
Pages (from-to)194-197
Number of pages4
JournalPhysics Procedia
Publication statusPublished - 2012
Event12th International Conference on Muon Spin Rotation, Relaxation and Resonance, muSR 2011 - Cancun, Mexico
Duration: 2011 May 162011 May 20


  • Amorphous and quasicrystalline magnetic materials
  • Critical-point effects
  • Muon-spin rotation and relaxation


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