Ordered FePt nanodot arrays with extremely high density have been developed by physical vapor deposition using porous alumina templates as evaporation masks. Nanodot diameter of 18 nm and periodicity of 25 nm have been achieved, resulting in an areal density exceeding 1 x1012 dots/in2. Rapid thermal annealing converts the disordered fcc to L10 phase, resulting in (001)-oriented FePt nanodot arrays with perpendicular anisotropy and large coercivity, without the need of epitaxy. High anisotropy and coercivity, perpendicular easy axis orientation and extremely high density are desirable features for future magnetic data storage media applications.
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机译：通过使用多孔氧化铝模板作为蒸发掩模的物理气相沉积，已经开发出具有极高密度的有序FePt纳米点阵列。已实现18 nm的纳米点直径和25 nm的周期性，导致面密度超过1 x 1012点/ in2。快速热退火将无序的fcc转变为L10相，从而产生了（001）取向的FePt纳米点阵列，该阵列具有垂直各向异性和大矫顽力，而无需外延。高各向异性和矫顽力，垂直易轴取向和极高密度是未来磁数据存储介质应用程序的理想功能。
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