Xu Y F, Yan M L, Sellmyer D J
Nebraska Center for Materials and Nanoscience, Department of Physics and Astronomy, University of Nebraska, Lincoln, NE 68588-0111, USA.
J Nanosci Nanotechnol. 2007 Jan;7(1):206-24.
High anisotropy L1(0) ordered FePt thin films are considered to have high potential for use as high areal density recording media, beyond 1 Tera bit/in2. In this paper, we review recent results on the synthesis and magnetic properties of L1(0) FePt nanocomposite films. Several fabrication methods have been developed to produce high-anisotropy FePt films: epitaxial and non-epitaxial growth of (001)-oriented FePt:X (X = Au, Ag, Cu, C, etc.) composite films that might be used for perpendicular media; monodispersed FePt nanocluster-assembled films grown with a gas-aggregation technique and having uniform cluster size and narrow size distribution; self-assembled FePt particles prepared with chemical synthesis by reduction/decomposition techniques, etc. The magnetic properties are controllable through variations in the nanocluster properties and nanostructure. FePt and related films show promise for development as heat-assisted magnetic recording media at extremely high areal densities. The self-assembled FePt arrays show potential for approaching the ultimate goal of single-grain-per-bit patterned media.
高各向异性的L1(0)有序FePt薄膜被认为具有用作面密度超过1太比特/平方英寸的高面密度记录介质的巨大潜力。在本文中，我们综述了关于L1(0) FePt纳米复合薄膜的合成及磁性能的近期研究成果。已开发出多种制备高各向异性FePt薄膜的方法：(001)取向的FePt:X（X = Au、Ag、Cu、C等）复合薄膜的外延和非外延生长，这类薄膜可用于垂直磁记录介质；采用气体聚集技术生长的具有均匀团簇尺寸和窄尺寸分布的单分散FePt纳米团簇组装薄膜；通过还原/分解技术进行化学合成制备的自组装FePt颗粒等。通过改变纳米团簇性质和纳米结构，磁性能是可控的。FePt及相关薄膜有望发展成为极高面密度下的热辅助磁记录介质。自组装FePt阵列显示出接近每比特单颗粒图案化介质这一最终目标的潜力。
