Magnetic properties of thin film and granular Dy50Fe50 as a function of size

摘要: Thin amorphous Dy50Fe50/A layers are prepared by sputtering to understand the influence of spacer layer A on magnetic properties in DyFe thickness regime where size effects also important. The this work is either Ti or Ca and we compare our earlier involving a Mo. Dy50Fe50 Mossbauer spectroscopy indicates that two types Fe site present. Finite manifest themselves below 10 nm reduction ordering temperature TC coercivity HC. For equal values d, HC larger for system with Mo as compared layer. We argue both structure interface important lowering TC. dependence studied suggests reversal via domain wall movement occurs thinnest films.