“…heat treatment, i.e. annealing at 693 K for 1000 h, is as small as 73 K. This result agrees well with that reported by Okazaki et al [13][14][15]. For this alloy the annealing temperature of 693 K is too low to bring T C to the saturated point around 664 K. This state is understood as that of ferromagnetic precipitated clusters existing among non-magnetic media.…”