Effects of thickness and annealing condition on magnetic properties and thermal stabilities of Ta/Nd/NdFeB/Nd/Ta sandwiched films

Liu Wen-Feng¹, Zhang Min-Gang^{1, †,}, Zhang Ke-Wei¹, Zhang Hai-Jie¹, Xu Xiao-Hong², Chai Yue-Sheng¹

Temperature dependences of the coercivities in Ta/Nd/NdFeB/Nd/Ta films: curve a, Ta/Nd(250 nm)/NdFeB (600 nm)/Nd(250 nm)/Ta annealed at 1023 K; curve b, Ta/Nd (250 nm) / NdFeB (600 nm)/Nd(250 nm)/Ta; curve c, Ta/Nd (250 nm)/NdFeB (900 nm) / Nd(250 nm)/Ta; and curve d, Ta/Nd(750 nm) / NdFeB(600 nm) / Nd(750 nm)/Ta. Here, the films of curves b–d are annealed at 923 K.