Stress-Induced Perpendicular Magnetization in Epitaxial Iron Garnet Thin Films

摘要: We have grown pseudomorphic Tm3Fe5O12 films (46–350 nm in thickness) with perpendicular magnetization on (111) Gd3Ga5O12 substrates. Among various garnets, is selected because of a negatively large magnetostriction constant to overcome strong shape anisotropy very thin films. A stress-induced field as +25 kOe estimated by calculation under moderate in-plane tensile strain +0.49%. The hysteresis loop and magnetic domain structure indicate the easy axis. size (W) its maze pattern varies from 500 960 increasing thickness (t) agrees well scaling law W∝√t.