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Hard Magnetic FePt Thin Films and Nanostructures in L10 Phase

机译:L10相的硬磁FePt薄膜和纳米结构

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By using high-resolution transmission electron microscopy the formation of the L10 phase in Fe-Pt multilayer can be studied in-situ during annealing. The formation of L10-FePt nuclei starts in the Pt layers by diffusion of Fe into the Pt layers. During annealing the L10-FePt nuclei grow in size and expand over the whole film. By using electron lithography patterned L10-Fe54Pt46 nanostructures have been produced. Below a critical dot thickness during post-annealing at high temperatures the dots split into an accumulation of isolated (single-domain) particles of irregular shape resulting in large coercivities of μ0Hc = 2.4 T.
机译:通过使用高分辨率透射电子显微镜,可以在退火过程中原位研究Fe-Pt多层膜中L10相的形成。 L10-FePt核的形成是通过Fe扩散到Pt层中而在Pt层中开始的。在退火过程中,L10-FePt核的尺寸增大,并在整个膜上扩展。通过使用电子光刻,已形成图案化的L10-Fe54Pt46纳米结构。高温后退火期间,低于临界点厚度的点会分裂成不规则形状的孤立的(单畴)颗粒聚集,从而导致较大的矫顽力μ0Hc= 2.4T。

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