Critical slowing down in Zn-Mg-Ho quasicrystal

被引：1
作者：
Sugiyama, Jun [1 ]
Nozaki, Hiroshi [1 ]
Ansaldo, Eduardo J. [2 ]
Morris, Gerald D. [2 ]
Brewer, Jess H. [2 ,3 ]
Sato, Taku J. [4 ]
机构：
[1] Toyota Cent Res & Dev Labs Inc, Nagakute, Aichi 4801192, Japan
[2] TRIUMF, Vancouver, BC V6T 2A3, Canada
[3] Univ British Columbia, Dept Phys & Astron, Vancouver, BC V6T 1Z1, Canada
[4] Univ Tokyo, ISSP, Kashihara, Nara 2778581, Japan
来源：
12TH INTERNATIONAL CONFERENCE ON MUON SPIN ROTATION, RELAXATION AND RESONANCE (MUSR2011) | 2012年 / 30卷
基金：
加拿大自然科学与工程研究理事会;
关键词：
Amorphous and quasicrystalline magnetic materials; Critical-point effects; Muon-spin rotation and relaxation; DYNAMICS;
D O I：
10.1016/j.phpro.2012.04.071
中图分类号：
O469 [凝聚态物理学];
学科分类号：
070205 ;
摘要：
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 (T-f=1.95 K), for which the susceptibility showed an anomaly at 5 K. The difference is attributed to crystalline electric field (CEF) effects. The muons experience a broad, fluctuating, field distribution, of width Delta similar to 6.3 T around T-f. 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 T-f.
引用
收藏
页码：194 / 197
页数：4
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