湖南城市学院学报(自然科学版)
湖南城市學院學報(自然科學版)
호남성시학원학보(자연과학판)
JOURNAL OF HUNAN CITY UNIVERSITY(NATURAL SCIENCE)
2012年
4期
49-54
,共6页
磁滞回线%相图%反铁磁耦合双层膜
磁滯迴線%相圖%反鐵磁耦閤雙層膜
자체회선%상도%반철자우합쌍층막
magnetic hysteresis loops%phase diagram%antiferrmagnetically exchange coupled bilayer
基于Stoner-Wohlfarth模型研究了非对称型反铁磁耦合三层体系的磁滞特性,得到了不同磁层厚度以及磁参数下发生线性磁相变临界转换场的解析表达式,以及9种可能存在的不同类型易轴磁滞回线.基于磁相变的临界条件获得了非对称反铁磁耦合双层膜体系在k1-k2空间的磁滞回线相图.非对称反铁磁耦合双层膜体系作为磁隧道结的自由层时,相对于单层结构自由层具有更好的热稳定性.
基于Stoner-Wohlfarth模型研究瞭非對稱型反鐵磁耦閤三層體繫的磁滯特性,得到瞭不同磁層厚度以及磁參數下髮生線性磁相變臨界轉換場的解析錶達式,以及9種可能存在的不同類型易軸磁滯迴線.基于磁相變的臨界條件穫得瞭非對稱反鐵磁耦閤雙層膜體繫在k1-k2空間的磁滯迴線相圖.非對稱反鐵磁耦閤雙層膜體繫作為磁隧道結的自由層時,相對于單層結構自由層具有更好的熱穩定性.
기우Stoner-Wohlfarth모형연구료비대칭형반철자우합삼층체계적자체특성,득도료불동자층후도이급자삼수하발생선성자상변림계전환장적해석표체식,이급9충가능존재적불동류형역축자체회선.기우자상변적림계조건획득료비대칭반철자우합쌍층막체계재k1-k2공간적자체회선상도.비대칭반철자우합쌍층막체계작위자수도결적자유층시,상대우단층결구자유층구유경호적열은정성.
Magnetic hysteresis properties of antiferromagnetically exchange-coupled bilayer structures, in which the two magnetic layers have different magnetic parameters and thicknesses, are studied within the framework of the Stoner-Wohlfarth model. Analytical expressions for the switching fields corresponding to the linear magnetic states are obtained. By adjusting the magnetic parameters or thicknesses of layers, nine different types of easy axis hysteresis loops may exist. The phase diagram of easy-axis hysteresis loops is mapped in the k1 and k2 plane, where k1 and k2 are the ratios of magnetic anisotropy to the interlayer exchange coupling of the two magnetic layers respectively. The advantage of this kind of recoding media over the transitional single layer media is also its better thermal stability.