Conversion of anisotropically phase-segregated Pd/γ-Fe2O3 nanoparticles into exchange-coupled fct-FePd/α-Fe nanocomposite magnets
Conversion of anisotropically phase-segregated Pd/γ-Fe2O3 nanoparticles into exchange-coupled fct-FePd/α-Fe nanocomposite magnets
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DOI：
10.1021/ja077921v
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发表时间：
2008-04-02
影响因子：
15
通讯作者：
Nakaya, Masafumi
中科院分区：
文献类型：
--
作者：
Teranishi, Toshiharu;Wachi, Ayako;Nakaya, Masafumi
通过界面原子扩散将各向异性相分离的Pd/ γ - fe2o3纳米颗粒转化为交换偶联的fft - fepd / α - fe纳米复合磁体。由α - fe和fcc-Pd相相互扩散形成的磁硬相在纳米尺度上几乎保持了它们的尺寸，因为它们被α - fe基体包围。VSM测量结果表明，软相和硬相之间实现了交换耦合。
Exchange-coupled fct-FePd/alpha-Fe nanocomposite magnets were fabricated by converting anisotropically phase-segregated Pd/gamma-Fe2O3 nanoparticles via the interfacial atom diffusion. The magnetically hard fct-FePd phases formed by the interdiffusion between alpha-Fe and fcc-Pd phases nearly preserve their sizes at the nanometer scale because they are surrounded by the alpha-Fe matrix. The VSM measurements reveal that the exchange coupling between the soft and hard phases has been realized.