Coercivity exceeding 100 kOe in epitaxially grown FePt sputtered films
Coercivity exceeding 100 kOe in epitaxially grown FePt sputtered films
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DOI：
10.1063/1.1794863
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发表时间：
2004-09
影响因子：
4
通讯作者：
T. Shima;K. Takanashi;Y. Takahashi;K. Hono
中科院分区：
文献类型：
--
作者：
T. Shima;K. Takanashi;Y. Takahashi;K. Hono
研究了具有大垂直磁各向异性的高序化FePt(001)薄膜的微结构和磁化过程。通过改变溅射在加热的MgO(001)衬底上的FePT薄膜的标称厚度(TN)，控制了薄膜的形貌，从单畴纳米粒子的组装到多畴岛的组装。从初始磁化曲线可以清楚地看出磁化过程从磁化旋转到磁化壁位移的变化。在室温和4.5K下，单畴粒子的薄膜分别获得了高达70kOe和105kOe的巨大矫顽力。
Microstructure and magnetization processes of highly ordered FePt(001) films with large perpendicular magnetic anisotropy have been studied. The film morphology was controlled from assemblies of single-domain nanoparticles to those of multidomain islands by varying the nominal thickness (tN) of the FePt films sputter-deposited on a heated MgO(001) substrate. The change in the magnetization process from magnetization rotation to domain wall displacement is clearly demonstrated by the initial magnetization curves. Huge coercivities as high as 70 and 105kOe have been achieved in the film with single-domain particles at room temperature and 4.5K, respectively.