Effective biaxial modulus and strain energy density of ideally (hkl)-fiber-textured hexagonal, tetragonal and orthorhombic films

Thickness dependence of magnetic properties in La–Co substituted strontium hexaferrite films with perpendicular anisotropy

“…However, as the thickness increases to 400 nm, the intensity of the peaks of (0 0 6) (0 0 8) (0 0 14) with (0 0 1) orientation decreases significantly and other randomly oriented peaks of (1 0 7) (1 1 0) (2 0 5) also appear. It is well known that Sr-M films have the hexagonal closepacked (hcp) stacking structure and the surface energy of (0 0 1) planes is lower than that of any other crystal planes, which is beneficial to form the (0 0 1) preferred orientation [9,10]. Moreover, the residual stress at the thin films exhibits compressive stress and gradually decreases with the increasing of thickness [11], which is favorable to enhance the (0 0 1) texture shown as Fig.…”