Evolution of microstructure, magnetic and microwave properties of sputter deposited polycrystalline YIG thin films

Tuning the Magnon Transport Properties of Y3Fe5O12 with a Cobalt Phthalocyanine Molecular Layer

“…For a pristine YIG single crystal, the saturation magnetization (i.e., M eff ) is reported to increase and saturate with decreasing temperature ( T ), following well a typical Bloch’s T 3/2 law . However, for thin YIG films, the saturation magnetization will be affected by other factors that could result in a distinct T dependence at low temperatures. , For example, grain size decreases with decreasing YIG film thickness . Moreover, different annealing conditions during the YIG film preparation could also induce a different local atomic disorder .…”

“…45 However, for thin YIG films, the saturation magnetization will be affected by other factors that could result in a distinct T dependence at low temperatures. 46,47 For example, grain size decreases with decreasing YIG film thickness. 46 Moreover, different annealing conditions during the YIG film preparation could also induce a different local atomic disorder.…”

“…46,47 For example, grain size decreases with decreasing YIG film thickness. 46 Moreover, different annealing conditions during the YIG film preparation could also induce a different local atomic disorder. 47 All of these factors will induce extra contributions for the temperature-dependent magnetization of YIG so it could show a different temperature dependence, such as the observed peak values of M eff for pure YIG film at around 50 K in Figure 3c.…”