Aging in a topological spin glass.
PHYS REV B
We have examined the nonconventianal spin-glass phase of the two-dimensional kagome antiferromagnet (H3O)Fe-3(SO4)(2)(OH)(6) by means of ac and de magnetic measurements. The frequency dependence of the ac susceptibility peak is characteristic of a critical slowing down at T(g)similar or equal to 18 K. At fixed temperature below T-g, aging effects are found which obey the same scaling law as in spin glasses or polymers. However, in clear contrast with conventional spin glasses, aging is remarkably insensitive to temperature changes. This particular type of dynamics is discussed in relation with theoretical predictions for highly frustrated nondisordered systems.
|Title:||Aging in a topological spin glass|
|Keywords:||HEISENBERG KAGOME ANTIFERROMAGNET, PYROCHLORE, JAROSITE, MAGNETIZATION, FRUSTRATION, TEMPERATURE, TRANSITION, DYNAMICS, DISORDER|
|UCL classification:||UCL > School of BEAMS > Faculty of Maths and Physical Sciences
UCL > School of BEAMS > Faculty of Maths and Physical Sciences > Chemistry
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