Magnetic trapping induced low temperature phase transition from fcc to fct in pulsed laser deposition of FePt:Al2O3 nanocomposite thin films
Magnetic trapping induced low temperature phase transition from fcc to fct in pulsed laser deposition of FePt:Al2O3 nanocomposite thin films
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DOI：
10.1063/1.2768904
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发表时间：
2007-08
影响因子：
4
通讯作者：
J. Lin;T. Zhang;P. Lee;S. V. Springham;T. Tan;R. Rawat;T. White;R. Ramanujan;Jun Guo
中科院分区：
文献类型：
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作者：
J. Lin;T. Zhang;P. Lee;S. V. Springham;T. Tan;R. Rawat;T. White;R. Ramanujan;Jun Guo
FePt:Al2O3 纳米复合薄膜是通过磁捕获辅助脉冲激光沉积合成的。从低Ku fcc-FePt 到高Ku fct-FePt 的相变所需的退火温度从传统脉冲激光沉积(PLD) 的约600°C 降低到磁捕获辅助PLD 的300°C。对于在 300°C 下退火的 fct 相 FePt 纳米颗粒样品，平均纳米颗粒尺寸估计约为 8.7±2.1nm，并且磁性能得到改善，这使其成为高密度数据存储应用的潜在良好候选者。
FePt:Al2O3 nanocomposite thin films have been synthesized by magnetic trapping assisted pulsed laser deposition. The annealing temperature required for phase transition from low Ku fcc-FePt to high Ku fct-FePt is lowered down from about 600°C for conventional pulsed laser deposition (PLD) to 300°C for magnetic trapping assisted PLD. For the sample annealed at 300°C with fct phase FePt nanoparticles, the average nanoparticle size is estimated to be about 8.7±2.1nm, and the magnetic properties are improved which makes it a potentially good candidate for possible applications in high density data storage.