Swift heavy ion induced surface modification for tailoring coercivity in Fe-Ni based amorphous thin films
Swift heavy ion induced surface modification for tailoring coercivity in Fe-Ni based amorphous thin films
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DOI：
10.1063/1.3075581
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发表时间：
2009-02
影响因子：
3.2
通讯作者：
S. Thomas;H. Thomas;D. Avasthi;A. Tripathi;R. Ramanujan;M. Anantharaman
中科院分区：
文献类型：
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作者：
S. Thomas;H. Thomas;D. Avasthi;A. Tripathi;R. Ramanujan;M. Anantharaman
采用热蒸发法制备了Fe-Ni基非晶薄膜。在室温下用108 MeV的Ag ~（8+）离子在15 UD的Pelletron加速器上以1× 10 ~（12）~ 3× 10 ~（13）ions/cm ~ 2的能量密度辐照这些薄膜。掠射角的X射线衍射研究表明，照射后的薄膜保留其非晶性质。用原子力显微镜研究了快速重离子轰击下薄膜的形貌演化，发现离子束辐照使薄膜表面粗糙化。使用振动样品磁强计的磁性测量表明，薄膜的磁性随离子注量的增加而增加。观察到的矫顽力变化与SHI照射下的薄膜的形貌演变。通过SHI辐照改变磁性能的能力可用于薄膜磁性的应用。
Fe–Ni based amorphous thin films were prepared by thermal evaporation. These films were irradiated by 108 MeV Ag8+ ions at room temperature with fluences ranging from 1×1012 to 3×1013 ions/cm2 using a 15 UD Pelletron accelerator. Glancing angle x-ray diffraction studies showed that the irradiated films retain their amorphous nature. The topographical evolution of the films under swift heavy ion (SHI) bombardment was probed using atomic force microscope and it was noticed that surface roughening was taking place with ion beam irradiation. Magnetic measurements using a vibrating sample magnetometer showed that the coercivity of the films increases with an increase in the ion fluence. The observed coercivity changes are correlated with topographical evolution of the films under SHI irradiation. The ability to modify the magnetic properties via SHI irradiation could be utilized for applications in thin film magnetism.