Aging and memory properties of topologically frustrated magnets.
JOURNAL OF APPLIED PHYSICS
The model 2d kagome system (H3O)Fe-3(SO4)(2)(OH)(6) and the 3d pyrochlore Y2Mo2O7 are two well characterized examples of low-disordered frustrated antiferromagnets which rather than condensing into spin liquid have been found to undergo a freezing transition with spin glass-like properties. We explore more deeply the comparison of their properties with those of spin glasses, by the study of characteristic rejuvenation and memory effects in the nonstationary susceptibility. While the pyrochlore shows clear evidence for these nontrivial effects, implying temperature selective aging, that is characteristic of a wide hierarchical distribution of equilibration processes, the kagome system does not clearly show these effects. Rather, it seems to evolve towards the same final state independently of temperature. (C) 2002 American Institute of Physics.
|Title:||Aging and memory properties of topologically frustrated magnets|
|Keywords:||HEISENBERG KAGOME ANTIFERROMAGNET, SPIN-GLASS, PYROCHLORE ANTIFERROMAGNET, NEUTRON-DIFFRACTION, RANGE ORDER, Y2MO2O7, TB2MO2O7, DISORDER, DYNAMICS, JAROSITE|
|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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