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000013778 084__ $$2WoS$$aPhysics, Condensed Matter
000013778 1001_ $$0P:(DE-HGF)0$$aHarikrishnan, S.$$b0
000013778 245__ $$aMemory effect in Dy0.5Sr0.5MnO3 single crystals
000013778 260__ $$aBristol$$bIOP Publ.$$c2010
000013778 300__ $$a346002
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000013778 440_0 $$03703$$aJournal of Physics: Condensed Matter$$v22$$x0953-8984$$y34
000013778 500__ $$aThe authors thank DAAD (ID 50726385) and the Department of Science and Technology (DST), India for exchange project grants. Financial support through FIST and DST project grants are acknowledged. SH thanks the MPI CPfS for financial support and hospitality in Dresden.
000013778 520__ $$aWe have performed a series of magnetic aging experiments on single crystals of Dy(0.5)Sr(0.5)MnO(3). The results demonstrate striking memory and chaos-like effects in this insulating half-doped perovskite manganite and suggest the existence of strong magnetic relaxation mechanisms of a clustered magnetic state. The spin-glass-like state established below a temperature T(sg)≈ 34 K originates from quenched disorder arising due to the ionic-radii mismatch at the rare earth site. However, deviations from the typical behavior seen in canonical spin glass materials are observed which indicate that the glassy magnetic properties are due to cooperative and frustrated dynamics in a heterogeneous or clustered magnetic state. In particular, the microscopic spin flip time obtained from dynamical scaling near the spin glass freezing temperature is four orders of magnitude larger than microscopic times found in atomic spin glasses. The magnetic viscosity deduced from the time dependence of the zero-field-cooled magnetization exhibits a peak at a temperature T < T(sg) and displays a marked dependence on waiting time in zero field.
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000013778 7001_ $$0P:(DE-HGF)0$$aRößler, S.$$b1
000013778 7001_ $$0P:(DE-Juel1)VDB84209$$aKumar, C. M. N.$$b2$$uFZJ
000013778 7001_ $$0P:(DE-Juel1)131047$$aXiao, Y.$$b3$$uFZJ
000013778 7001_ $$0P:(DE-HGF)0$$aBhat, H. L.$$b4
000013778 7001_ $$0P:(DE-HGF)0$$aRößler, U. K.$$b5
000013778 7001_ $$0P:(DE-HGF)0$$aSteglich, F.$$b6
000013778 7001_ $$0P:(DE-HGF)0$$aWirth, S.$$b7
000013778 7001_ $$0P:(DE-HGF)0$$aElizabeth, S.$$b8
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