CAJ | 학술논문

采用Monte Carlo模拟方法,通过反铁磁层中非磁性掺杂方式调节铁磁层与反铁磁层界面微结构,讨论了其界面微结构对体系的磁滞回线的不对称性、交换偏置场及矫顽场的影响.模拟结果显示:在同一掺杂浓度下,体系的磁滞回线的不对称性及交换偏置场强烈地依赖于掺杂方式,但矫顽场几乎不受影响,其相应的温度特性亦依赖于掺杂方式.它表明铁磁/反铁磁双层膜体系中的磁滞回线的不对称性以及交换偏置场与其界面微结构密切相关,同时实验上人们可通过界面微结构的改变获得交换偏置场大、矫顽场小且热稳定性好的自旋阀结构.
채용Monte Carlo모의방법,통과반철자층중비자성참잡방식조절철자층여반철자층계면미결구,토론료기계면미결구대체계적자체회선적불대칭성、교환편치장급교완장적영향.모의결과현시:재동일참잡농도하,체계적자체회선적불대칭성급교환편치장강렬지의뢰우참잡방식,단교완장궤호불수영향,기상응적온도특성역의뢰우참잡방식.타표명철자/반철자쌍층막체계중적자체회선적불대칭성이급교환편치장여기계면미결구밀절상관,동시실험상인문가통과계면미결구적개변획득교환편치장대、교완장소차열은정성호적자선벌결구.
Based on Monte-Carlo method,the interfacial microstructure dependence of the asymmetry of hysteresis loop,the exchange-bias field and the coercivity in FM/AFM bilayers was studied,in which the interfacial microstructure is tuned by incorporating nonmagnetic impurities in the AFM layer.The resuits show that both the asymmetry of hysteresis loop and the exchange bias field strongly depend on the way of dopping,however the corcivity is hardly influenced.Moreover,the temperature dependence of both the exchange-bias field and the coercivity is closely related with the way of dopping.Therefore,the interfacial microstmcture plays an important role in the magnetic properties of FM/A FM bilayers,I.e.changing the asymmetry of hysteresis loop,the exchange-bias field and the coercivity.Meanwhile,these results also imply that spin-valves with large exchange bias field,small coercivity and good thermal stability as well can be realized by tuning the interfacial microstructure.