As-grown enhancement of spinodal decomposition in spinel cobalt ferrite thin films by Dynamic Aurora pulsed laser deposition

被引：12
|
作者：
Debnath, Nipa [1 ,2 ]
Kawaguchi, Takahiko [3 ]
Kumasaka, Wataru [3 ]
Das, Harinarayan [4 ]
Shinozaki, Kazuo [5 ]
Sakamoto, Naonori [3 ,6 ]
Suzuki, Hisao [1 ,3 ,6 ]
Wakiya, Naoki [1 ,3 ,6 ]
机构：
[1] Shizuoka Univ, Grad Sch Sci & Technol, Hamamatsu, Shizuoka 4328561, Japan
[2] Jagannath Univ, Dept Phys, Dhaka 1100, Bangladesh
[3] Shizuoka Univ, Dept Elect & Mat Sci, Hamamatsu, Shizuoka 4328561, Japan
[4] Atom Energy Ctr, Mat Sci Div, Dhaka 1000, Bangladesh
[5] Tokyo Inst Technol, Sch Mat & Chem Technol, Tokyo 1528550, Japan
[6] Shizuoka Univ, Res Inst Elect, Hamamatsu, Shizuoka 4328561, Japan
来源：
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS | 2017年 / 432卷
基金：
日本科学技术振兴机构;
关键词：
Cobalt ferrite thin film; Spinodal decomposition; Dynamic Aurora PLD; MAGNETIC-FIELD; PHASE-SEPARATION; GIANT MAGNETORESISTANCE; IRON COBALTITES; ABLATION PLUME; SYSTEM;
D O I：
10.1016/j.jmmm.2017.02.023
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Cobalt ferrite CoxFe3 O-x(4) thin films with composition within the miscibility gap were grown using Dynamic Aurora pulsed laser deposition. X-ray diffraction patterns reveal as-grown phase separation to Fe-rich and Co-rich phases with no post-deposition annealing. The interconnected surface microstructure of thin film shows that this phase separation occurs through spinodal decomposition enhanced by magnetic-field-induced ion-impingement. The lattice parameter variation of the thin films with the magnetic field indicates that the composition fluctuations can be enhanced further by increasing the magnetic field. Results show that spinodal decomposition enhancement by magnetic-field-induced ion-impingement is independent of the lattice-mismatch-induced strain. This approach can promote spinodal decomposition in any thin film with no post-deposition annealing process. (C) 2017 Elsevier B.V. All rights reserved.
引用
收藏
页码：391 / 395
页数：5
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