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Nd(Tb,Dy)Co/Cr薄膜的磁性能与磁光性能

Magnetic and magneto-optical properties of thin films of Nd(Tb,Dy)Co/Cr

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【作者】 程伟明李佐宜晋芳林更琪

【Author】 Cheng Weiming Li Zuoyi Jin Fang Lin Gengqi Doctoral Candidate; Dept. of Electronics Sci. & Tech., Huazhong Univ. of Sci. & Tech., Wuhan 430074, China.

【机构】 华中科技大学电子科学与技术系华中科技大学电子科学与技术系 湖北武汉430074湖北武汉430074

【摘要】 采用射频磁控溅射法在玻璃基片上制备了Nd(Tb,Dy)Co/Cr薄膜.X射线衍射仪分析结果表明溅射制得的Nd(Tb,Dy)Co薄膜为非晶结构.振动样品磁强计(VSM)测试结果显示NdTbCo薄膜垂直膜面方向矫顽力与剩磁矩形比分别达到308.8kA/m和0.732,而平行膜面方向矫顽力与剩磁矩形比分别仅为22.3kA/m和0.173,这表明NdTbCo薄膜具有垂直磁各向异性.随着Nd掺杂量的增加,Nd(Tb,Dy)Co薄膜的矫顽力逐渐降低,克尔旋转角与反射率则逐渐升高.(NdxTb1-x)31Co69的克尔旋转角和反射率分别从x=0的0.2720°,0.2616,上升到x=0.338的0.3258°,0.3320.(NdxDy1-x)33Co67的克尔旋转角和反射率分别从x=0.210的0.2761°,0.3054,上升到了x=0.321的0.3231°,0.3974.Nd掺杂量对克尔旋转角的影响可用Nd(Tb,Dy)Co的亚铁磁结构进行解释.

【Abstract】 Thin films of Nd(Tb,Dy)Co/Cr were prepared onto glass substrate by RF magnetron sputtering and amorphous shown by X-ray diffraction (XRD). The results from vibrating sample magnetometer(VSM) measurement revealed that NdTbCo thin films had perpendicular magnetic anisotropy. The perpendicular coercivity and remanence square ratio reached 308.8kA/m and 0.732 respectively, and the inplanar coercivity and remanence square ratio were only 22.3kA/m and 0.173 respectively. With the addition of Nd, the coercivity decreased gradually, while kerr rotation angle and reflectivity increased step by step. When x increased from 0 to 0.338, kerr rotation angle and reflectivity of (Nd_xTb_ 1-x)_ 31Co_ 69 thin films increased from 0.2720°, 0.2616 to 0.3258°, 0.3320 respectively. When x increased from 0.210 to 0.321, kerr rotation angle and reflectivity of (Nd_xDy_ 1-x)_ 33Co_ 67 thin films increased from 0.2761°, 0.3054 to 0.3231°, 0.3974 respectively. The effect of Nd addition on kerr rotation angle was explained by the ferrimagnetic structure of Nd(Tb,Dy)Co.

【基金】 国家自然科学基金重大项目(60490290).
  • 【文献出处】 华中科技大学学报(自然科学版) ,Journal of Huazhong University of Science and Technology(Nature Science Edition) , 编辑部邮箱 ,2006年04期
  • 【分类号】TN304.05
  • 【被引频次】2
  • 【下载频次】115
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