Role of initial conditions in spin-glass aging experiments

Article

关键词: OFF-EQUILIBRIUM DYNAMICS;    NONEQUILIBRIUM DYNAMICS;    RESPONSE FUNCTION;    FIELD;    TEMPERATURE;    RELAXATION;    BEHAVIOR;    SIMULATION;    STATE;   

DOI  :  10.1103/PhysRevB.67.184422

来源: SCIE

【 摘 要 】

The effect of initial conditions on aging properties of the spin-glass state is studied for a single crystal Cu:Mn 1.5 at %. It is shown that the memory of the initial state, created by the cooling process, remains strong on all experimental time scales. The t/t(w) scaling properties of two relaxation functions, the thermoremanent magnetization (TRM) and the isothermal remanent magnetization (IRM) (with t(w1) = 0 and t(w2) = t(w)), are compared in detail. It is observed that the IRM relaxation as a function of t/t(w) demonstrates a superaging behavior. This result suggests that the subaging, exhibited by the TRM decay, arises from the influence of the cooling process, and cannot be considered a natural type of scaling in spin-glass dynamics.

【 授权许可】

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