Full aging in spin glass state of Y0.90Na0.10MnO 3

We study the decays of the thermoremanent magnetization in Y 0.09Na0.10MnO3 for different waiting times at the measuring temperature 33 K, well below the spin glass (SG) transition temperature 42 K. The results demonstrate that almost perfect full aging can appear even in the case of the cooling time as long as 700s from 60 K to 33 K. By subtracting the stationary component A(τ0/t)a (A is a dimensionless constant, t represents the time, τ0 is the microscopic spin flipping time, and α is a parameter always in the rang of 0.1-0.01), the value of α is found to be much smaller than that reported in other SG systems, which is well consistent with the behaviour of the ac susceptibility. All of them are discussed based on the intrinsic geometric magnetic frustration for the present system.