Journal article
Observation of isotropic critical spin fluctuations in Gd
Physical review. B, Condensed matter, Vol.33(7), pp.4747-4751
1986
Handle:
https://hdl.handle.net/2376/122757
PMID: 9938938
Abstract
Perturbed γγ angular-correlation experiments on oriented single crystals of Gd, containing 1 ppb of 111In, demonstrate that critical spin fluctuations are isotropic to within about 1 K above the Curie temperature. Closer to TC we find evidence that the critical spin fluctuations fall increasingly along the c axis. Analysis of nuclear relaxation times in the isotropic region leads to spin autocorrelation times that diverge with an exponent w=0.53(8). This value is not consistent with either spin-nonconserved Heisenberg behavior or Ising behavior, but agrees with Mössbauer data for Gd 161Dy.
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Details
- Title
- Observation of isotropic critical spin fluctuations in Gd
- Creators
- G. S Collins - Clark UniversityA. R Chowdhury - Clark UniversityC Hohenemser - Clark University
- Publication Details
- Physical review. B, Condensed matter, Vol.33(7), pp.4747-4751
- Academic Unit
- Physics and Astronomy, Department of
- Publisher
- American Physical Society
- Identifiers
- 99900647237701842
- Language
- English
- Resource Type
- Journal article