排序方式: 共有41条查询结果,搜索用时 16 毫秒
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从未来微型计算机对磁存储器应具有超高存储密度的要求出发,讨论了磁存储材料的未来发展.并指出,最有希望的材料是沿用传统模式纵向记录的薄膜磁介质和新型的磁光存储薄膜.对于如何实现此超高密度的磁和磁光存储,文章还讨论了各自需要解决的问题及相关的信息存储和读出技术. 相似文献
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非晶态磁性材料(磁性玻璃),这个名词人们还是生疏的.因为人们经常使用的磁性材料虽然种类很多,可是微观结构都属于结晶态.其原子排列长程有序,具有一定的晶格结构及相应的对称性. 然而,能否将材料制备成原子“混乱”排列、不具有长程有序的结构呢?随着研究工作的深入,近年来“玻璃半导体”,“玻璃超导体”,“金属玻璃”等纷纷出现,磁性玻璃也是其中之一,这些材料都以优异的特性而具有魅力. 例如,含铬的非晶态金属材料,具有非凡的抗腐蚀能力.图1即为非晶态Fe70Cr10P13C7,合金与不锈钢置于同样的腐蚀条件下,腐蚀速度的对比. 非晶态合金还具… 相似文献
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用偏压磁控溅射所制备得的非晶钆铽铁膜具有适用于磁光存储的材料参数。垂直膜面磁各向异性能常数随着偏压的增加而增加,借助于Johnson-Mehl-Avrami方程和Kissinger方程的计算,报道了非晶Gd27Tb10Fe63膜的晶化动力学参数,激活能△E=2.0电子伏,转变指数n=1。上述成份的GdTbFe膜的晶化温度、激活能都要高于二元系统的GdCo,GdFe膜,等温退火的结果表明,GdTbFe膜具有磁光存储应用所必须要求的较好的热稳定性。
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2.0nmCo/tnmRu层间反磁铁耦合 磁性录音 振动交换 添加效应 2.0nmCo/tnmRu1-xPdx multilayers with x=0, 0.05, 0.08, 0.24, 0.39 and 0.48 were prepared by magnetron sput-tering. The spacer layer thickness of both Ru (before doping Pd) and RuPd (after doping Pd) varies from 0.2nm to 1.6nm. Two effects have been investigated: (1) the dependence of the interlayer coupling on the thickness of Ru1-xPdx as a function of x and (2) the dependence of the interlayer coupling on Pd doping density, x, as a function of thickness of Ru1-xPdx. Our results indicate that the interlayer coupling is strongly dependent on the doping density and the spacer layer thickness. The saturation field Hs increases when very low concentration of Pd doped in the Ru layers and a suitable spacer thickness are adopted. 相似文献
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Structural phase transition of MnBi and MnBiAl films has been investigated in the tem-perature range of 30-400℃. The transition from low-temperature phase to high-temperature phase occurs in both the films, but the phase transitions appear at different temperatures. According to the measurement of Kerr rotation as a function of thermal annealing and the phase transition process, it is shown that the transition is irreversible for MnBi film and reversible for MnBiAl film under our experimental condition. For this reason, we speculate that the aluminum added in MnBi makes the bonding force of Mn atoms with their neighbors stronger, which may be the cause for the difference of the phase transition between MnBi and MnBiAl films. 相似文献
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