The asymmetry factor (Pasy) can be calculated by using the formula Pasy=(1−hU/hL)Pasy=(1−hU/hL),where hUhU is the height of the absorption peak above the base line and hLhL is the height of the absorption peak below the base line of the ESR spectra. The calculated ESR parameters are displayed in Table 2. The large value of PasyPasy for x=0.03 indicates large magnetocrystalline anisotropy in the magnetic interaction. Reduction in magnetocrystalline anisotropy with increasing doping concentration provides low energy to stabilize the crystal structure and results in distortion of spin cycloid structure . The results obtained from ESR spectra are consistence with the VSM observations.