Growth and properties of Sb and Ti substituted (100) EuIG films as a function of Pb content

Films of (100) EuIG doped with Sb or Ca and (100) EuYIG doped with Sb were grown with various Pb contents from a PbO:5.5 B2O3 (mole ratio) based flux. The large Pb-induced uniaxial anisotropy, which occurs in (100) Pb films was not reduced significantly by Sb or Ca additions. The l-parameter decreased from 0.07 for undoped films to about 0.04 to 0.05, for doped films at Pb contents between 0.6 and 0.8 moles/formula unit. These data suggest that Sb and Ti had substituted for the octahedral Fe and had increased the magnetization. The Q-factor for films with these l-parameters was about 2. It is further assumed that Pb is incorporated as Pb2+ and Pb 4+ on different cation sites according to the model of Scott and Page. A comparison of our calculated and measured values of Δa support this model.