Structure,magnetic properties and giant magneto-striction studies in [Tb/Fe/Dy]_n nano-multilayer film  

作　　者：LI XiaoDong ZHAO ZhenJie HUANG SuMei PAN LiKun CHEN YiWei YANG XieLong SUN Zhuo 

机构地区：[1]Department of Physics, Engineering Research Center for Nanophotonics & Advanced Instrument, Ministry of Education, East ChinaNormal University, Shanghai 200062, China

出　　处：《Chinese Science Bulletin》2009年第4期608-611,共4页

基　　金：Supported by the National Natural Science Foundation of China (Grant Nos. 60477003, 10774046)

摘　　要：[Tb/Fe/Dy]n nano-multilayer films, with precise composition of Tb0.27Dy0.73Fe2, were prepared by the multi-targets magnetron sputtering technique at room temperature (sample A) and 300℃ substrate temperature (sample B). Both of the nano-multilayer films show columnar structures perpendicular to the film plane according to the scanning electron microscopy results. The magnetic hysteresis loops and the giant magnetostriction (GMS) property of the two samples indicate the perpendicular anisotropy in them. In spite of the perpendicular anisotropy, both of the samples present GMS effect. In a very low applied field of 0.18 T, the GMS value in sample B is 89.3 ppm, which is about four times of that in sample A, 23.5 ppm. The good low-field GMS effect in sample B might attribute to the Laves phase of R-Fe2 segregated from the amorphous matrix under the thermal annealing of the substrate. The relation between the magnetization process and GMS property of the perpendicular anisotropy nano-multilayer films is further investigated.[Tb/Fe/Dy]n nano-multilayer films, with precise composition of Tb0.27Dy0.73Fe2, were prepared by the multi-targets magnetron sputtering technique at room temperature （sample A） and 300℃ substrate temperature （sample B）. Both of the nano-multilayer films show columnar structures perpendicular to the film plane according to the scanning electron microscopy results. The magnetic hysteresis loops and the giant magnetostriction （GMS） property of the two samples indicate the perpendicular anisotropy in them. In spite of the perpendicular anisotropy, both of the samples present GMS effect. In a very low applied field of 0.18 T, the GMS value in sample B is 89.3 ppm, which is about four times of that in sample A, 23.5 ppm. The good low-field GMS effect in sample B might attribute to the Laves phase of R-Fe2 segregated from the amorphous matrix under the thermal annealing of the substrate. The relation between the magnetization process and GMS property of the perpendicular anisotropy nano-multilayer films is further investigated.

关 键 词：纳米多层模 磁弹性效果 正交各向异性 [铽/铁/镝]n纳米材料 

分 类 号：TB383[一般工业技术—材料科学与工程]