Fabrication and nanostructure of oriented FePt particles
Fabrication and nanostructure of oriented FePt particles
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DOI：
10.1063/1.372900
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发表时间：
2000-05-01
影响因子：
3.2
通讯作者：
Hirotsu, Y
中科院分区：
文献类型：
--
作者：
Bian, B;Laughlin, DE;Hirotsu, Y
用电子束蒸发法制备了由非晶态氧化铝分离的取向四方铁铂颗粒薄膜。不需要粗化的FePT颗粒的有序性可以通过热处理条件来调节。退火后薄膜的矫顽力最高可达4.4 kOe。退火后薄膜的垂直磁化强度略大于面内磁化强度。一些四方FePT颗粒具有{111}孪晶和层错。我们的高分辨电子显微镜观察表明，有序FePT颗粒的中心区域倾向于具有垂直于薄膜平面的c轴。(C)2000年美国物理研究所。[S0021-8979(00)46908-2]。
Thin films of oriented tetragonal FePt particles separated by amorphous alumina have been fabricated by electron beam evaporation. The ordering of the FePt particles without coarsening can be tailored by annealing conditions. The value of coercivity of the annealed film reached as high as 4.4 kOe. The perpendicular magnetic coercivity of the annealed film was slightly larger than in-plane coercivity. Some of the tetragonal FePt particles were found to have {111} twins and stacking faults. From our high-resolution electron microscopy observations, it was determined that central region of the ordered FePt particles tended to have c-axis perpendicular to the film plane. (C) 2000 American Institute of Physics. [S0021-8979(00)46908-2].