利用微磁学理论模拟计算了Nd_2Fe_(14) B/α-Fe交换耦合双层膜的磁滞回线,并对双层膜体系的剩磁、矫顽力、最大磁能积与软磁层厚度的关系进行了研究.结果显示,软磁层厚度小于临近尺寸时,磁滞回线为矩形,双层膜完全耦合;软磁层厚度与磁性能的关系表明,随着软磁层厚度的增加,剩磁和最大磁能积先增大后减小,而矫顽力单调下降.
The magnetic hysteresis loops of Nd_2Fe_(14)B/α-Fe exchange-coupling multilayers are simulated by micromagnetic theory, and the relation between remanence, coercivity, energy products and soft magnetic thickness are studied, The results show that the hysteresis loops is rectangle and the multilayers are in complete exchange-coupling region when the soft magnetic thickness is below the critical point;By the relation between magnetic properties and soft magnetic thickness, The remanence and maximum energy products firstly enhance and decrease later with the increase of the soft magnetic thickness, but the coercivity decreases monotonically.
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