Structure, magnetic properties and giant magnetostriction studies in [Tb/Fe/Dy]n nano-multilayer film

• Published in: Chinese science bulletin 2009-02, Vol.54 (4), p.608-611
• Main Authors: Li, XiaoDong, Zhao, ZhenJie, Huang, SuMei, Pan, LiKun, Chen, YiWei, Yang, XieLong, Sun, Zhuo
• Format: Article
• Language: English
• Subjects: [铽/铁/镝]n纳米材料; Articles/Condensed State Physics; Chemistry/Food Science; Earth Sciences; Engineering; Humanities and Social Sciences; Life Sciences; multidisciplinary; Physics; Science; Science (multidisciplinary); 正交各向异性; 磁弹性效果; 纳米多层模
• ISSN: 1001-6538; 1861-9541
• DOI: 10.1007/s11434-009-0040-7

[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.