Preparation of soft magnetic FeCo-based films for writers

Preparation of soft magnetic FeCo-based films for writers
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书写用软磁FeCo基薄膜的制备

DOI:
10.1063/1.3078008
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发表时间:
2009-03
影响因子:
3.2
通讯作者:
Wei, Fulin
Wei, Fulin
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Liu, Xiaoxi;Wang, Xuan;Wei, Dan;Zheng, Fu;Liu, Zhaoyang;Wei, Fulin

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在FeCoAlO薄膜的射频溅射过程中,在环氧树脂中引入C元素,制备了新型软磁头材料FeCoAlOC纳米晶薄膜。当Al2O3与FeCo共溅射时,薄膜的软磁性能得到了很大的改善:矫顽力从几十个oersted降低到几个oersted (Hch ~ 4.8 Oe和Hce ~ 6.5 Oe)。随着碳的进一步添加,薄膜具有优异的软磁性能和良好的高频响应,矫顽力低至1.0 Oe,饱和Bs>20 kG, f≤1.0 GHz时磁导率μ ' >500,截止频率约为1.7 GHz。显微结构测试表明,薄膜的良好磁性能与薄膜的小增益尺寸有关。
New soft magnetic head materials, the nanocrystalline FeCoAlOC thin films, were prepared by introducing C element in epoxy resin during rf sputtering of FeCoAlO films. When Al2O3 was cosputtered with FeCo, soft magnetic properties of thin films were highly improved: the coercive force decreases from dozen of oersted to several oersted (Hch∼4.8 Oe and Hce∼6.5 Oe). With further addition of carbon, the thin films exhibit excellent soft magnetic properties and good high frequency response: the coercivity is as low as 1.0 Oe, with saturation Bs>20 kG, permeability μ′>500 when f≤1.0 GHz, and cutoff frequency around 1.7 GHz. The measurement of microstructure shows that the good magnetic properties are correlated with the small gain size of film.
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