Specific features of depth distribution profiles of implanted cobalt ions in rutile TiO2

被引:13
作者
Achkeev, A. A. [1 ]
Khaibullin, R. I. [1 ,2 ]
Tagirov, L. R. [1 ,2 ]
Mackova, A. [3 ,4 ]
Hnatowicz, V. [3 ]
Cherkashin, N. [5 ]
机构
[1] Kazan Volga Reg Fed Univ, Kazan 420008, Tatarstan, Russia
[2] Russian Acad Sci, Kazan Sci Ctr, Zavoisky Phys Tech Inst, Kazan 420029, Tatarstan, Russia
[3] Acad Sci Czech Republic, Inst Nucl Phys, CZ-25068 Rez, Czech Republic
[4] Univ JE Purkyne, Fac Sci, Dept Phys, Usti Nad Labem 40096, Czech Republic
[5] Univ Toulouse, CNRS, Natl Ctr Sci Res, CEMES Res Lab, F-31000 Toulouse 4, France
基金
俄罗斯基础研究基金会;
关键词
ROOM-TEMPERATURE FERROMAGNETISM; SEMICONDUCTORS; OXIDE;
D O I
10.1134/S1063783411030024
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
This paper reports on the results of the calculation of the depth distribution profiles of the concentration of the impurity implanted into an anisotropic crystalline material. The sputtering of the irradiated material, fast one-dimensional diffusion of the impurity along structural channels, and accumulation of the implanted impurity at different depths have been taken into account. The results of the calculations have been compared with the experimental distribution profiles of cobalt ions implanted into the crystal structure of rutile TiO2 along and across structural channels at different temperatures of the irradiated substrate. A comparison of the model and experimental profiles has made it possible to evaluate the precipitation rate of cobalt in the TiO2 matrix on different precipitation centers. A model has been proposed for explaining the unusual shift in the peak of the concentration distribution of implanted ions deep into the sample with an increase in the temperature of the irradiated substrate. The model has allowed one to separate the contributions from different phases of the impurity (nanoparticles and solid solution) to the magnetism of the Co: TiO2 system.
引用
收藏
页码:543 / 553
页数:11
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