Three- and two-dimensional calculations for the interface anisotropy dependence of magnetic properties of exchange-spring Nd2Fe14B/α-Fe multilayers with out-of-plane easy axes<xref rid="cpb_29_3_037501fn1" ref-type="fn">*</xref><fn id="cpb_29_3_037501fn1"><label>*</label>Project supported by the National Key Research and Development Program of China (Grant No. 2016YFB0700900), the National Natural Science Foundation of China (Grant Nos. 51571126 and 51861030), the Inner Mongolia Autonomous Region Natural Science Foundation of China (Grant No. 2019MS01002), and the Inner Mongolia Innovative Research Team of China (Grant No. 3400102).</fn>

Three- and two-dimensional calculations for the interface anisotropy dependence of magnetic properties of exchange-spring Nd₂Fe₁₄B/α-Fe multilayers with out-of-plane easy axes**

Project supported by the National Key Research and Development Program of China (Grant No. 2016YFB0700900), the National Natural Science Foundation of China (Grant Nos. 51571126 and 51861030), the Inner Mongolia Autonomous Region Natural Science Foundation of China (Grant No. 2019MS01002), and the Inner Mongolia Innovative Research Team of China (Grant No. 3400102).

Zhao Qian^{1, †}, He Xin-Xin¹, Morvan Francois-Jacques², Zhao Guo-Ping^{1, 3, ‡}, Li Zhu-Bai¹

Two-dimensional evolution of the magnetic moments calculated by OOMMF of a Nd₂Fe₁₄B (10 nm)/α-Fe (6 nm) multilayer at the hard/soft interface when K^int = 0 erg/cm². (a) H = 0.7 kOe, the formation of the vortex state after nucleation; (b) H = −4.0 kOe, at which the vortex core begins to rotate away; (c) H = −14.0 kOe right at the pinning point where the component of the in-plane magnetic moments is the largest; and (d) H = −14.7 kOe, where the vortex state has annihilated after magnetic reversal. The adopted ratio is 1 : 12 for presentation. This means that one displayed magnetic moment at the figure stands for 12 × 12 calculated moments.