Critical Slowing Down in Zn-Mg-Ho Quasicrystal

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

doi:10.1016/j.phpro.2012.04.071

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 journal › Conference article

1 Citation (Scopus)

Abstract

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 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 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.

Original language	English
Pages (from-to)	194-197
Number of pages	4
Journal	Physics Procedia
Volume	30
DOIs	https://doi.org/10.1016/j.phpro.2012.04.071
Publication status	Published - 2012 Jan 1
Externally published	Yes
Event	12th International Conference on Muon Spin Rotation, Relaxation and Resonance, muSR 2011 - Cancun, Mexico Duration: 2011 May 16 → 2011 May 20

Keywords

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

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1016/j.phpro.2012.04.071

Fingerprint Dive into the research topics of 'Critical Slowing Down in Zn-Mg-Ho Quasicrystal'. Together they form a unique fingerprint.

Cite this

Sugiyama, J., Nozaki, H., Ansaldo, E. J., Morris, G. D., Brewer, J. H., & Sato, T. J. (2012). Critical Slowing Down in Zn-Mg-Ho Quasicrystal. Physics Procedia, 30, 194-197. https://doi.org/10.1016/j.phpro.2012.04.071

@article{3760559073b2499a90968ed812000fd2,

title = "Critical Slowing Down in Zn-Mg-Ho Quasicrystal",

abstract = "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.",

keywords = "Amorphous and quasicrystalline magnetic materials, Critical-point effects, Muon-spin rotation and relaxation",

author = "Jun Sugiyama and Hiroshi Nozaki and Ansaldo, {Eduardo J.} and Morris, {Gerald D.} and Brewer, {Jess H.} and Sato, {Taku J.}",

year = "2012",

month = jan,

day = "1",

doi = "10.1016/j.phpro.2012.04.071",

language = "English",

volume = "30",

pages = "194--197",

journal = "Physics Procedia",

issn = "1875-3892",

publisher = "Elsevier BV",

note = "12th International Conference on Muon Spin Rotation, Relaxation and Resonance, muSR 2011 ; Conference date: 16-05-2011 Through 20-05-2011",

}

TY - JOUR

T1 - Critical Slowing Down in Zn-Mg-Ho Quasicrystal

AU - Sugiyama, Jun

AU - Nozaki, Hiroshi

AU - Ansaldo, Eduardo J.

AU - Morris, Gerald D.

AU - Brewer, Jess H.

AU - Sato, Taku J.

PY - 2012/1/1

Y1 - 2012/1/1

N2 - 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.

AB - 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.

KW - Amorphous and quasicrystalline magnetic materials

KW - Critical-point effects

KW - Muon-spin rotation and relaxation

UR - http://www.scopus.com/inward/record.url?scp=84978473820&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84978473820&partnerID=8YFLogxK

U2 - 10.1016/j.phpro.2012.04.071

DO - 10.1016/j.phpro.2012.04.071

M3 - Conference article

AN - SCOPUS:84978473820

VL - 30

SP - 194

EP - 197

JO - Physics Procedia

JF - Physics Procedia

SN - 1875-3892

T2 - 12th International Conference on Muon Spin Rotation, Relaxation and Resonance, muSR 2011

Y2 - 16 May 2011 through 20 May 2011

ER -