In-plane magnetic anisotropy and coercive field dependence upon thickness of CoFeB

► We study the ion-beam sputter deposited CoFeB film by MOKE and GAXRD. ► A nanocrystalline structure is observed in the GAXRD pattern. ► Coercivity increases with increase in film thickness. ► In-plane magnetic anisotropy is observed. ► The dominant contribution to magnetic anisotropy is strain induced magnetic anisotropy.