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基于奥苏贝尔的先行组织者策略,从对它的理解出发,并以此为根据设计了一堂物理习题课的教学,最后总结讨论物理习题课应具有指点解题思路、引申解题方法的功效. 相似文献
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用多靶射频磁控溅射系统在玻璃基片上制备了SmCo磁性薄膜。并采用控制变量法研究了溅射功率、溅射时间以及溅射气压等工艺参数对薄膜磁性能的影响。结果发现,当磁性层溅射功率为60W,溅射气压为0.5Pa,溅射时间为8min;底层溅射功率为125W,溅射气压为0.5Pa,溅射时间为4min时,薄膜的矫顽力高达2.79×10^5。底层对SmCo薄膜的磁性能也有影响,振动样品磁强计测量结果表明:相比Cr、Ti底层,以Cu作为底层所得到的SmCo薄膜磁性能更好,薄膜矫顽力分别比用Cr、Ti作底层时高出56%,40%。 相似文献
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黄致新 《武汉理工大学学报(材料科学英文版)》2012,27(2):195-198
Amorphous GdTbFeCo magnetic thin films were successfully prepared on glass substrates by RF magnetron sputtering system from a mosaic target.The influences of sputtering parameters on the magneto-optical properties GdTbFeCo thin film were investigated by the variable control method.And the influence mechanism was analyzed in detail.After the sputtering parameters were optimized,it was found that when the distance between target and substrate was 72 mm,the thin film thickness was 120 nm,and the sputtering power,sputtering pressure and sputtering time was 75 W,0.5 Pa and 613 s,respectively,the coercivity with perpendicular anisotropy could be as high as 6735 Oe,and the squareness ratio of the hysteresis loop was almost equal to 1. 相似文献
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