Crystallographically oriented Fe nanocrystals formed in Fe-implanted TiO2

被引：39
|
作者：
Zhou, Shengqiang [1 ]
Talut, G. [1 ]
Potzger, K. [1 ]
Shalimov, A. [1 ]
Grenzer, J. [1 ]
Skorupa, W. [1 ]
Helm, M. [1 ]
Fassbender, J. [1 ]
Cizmar, E. [2 ]
Zvyagin, S. A. [2 ]
Wosnitza, J. [2 ]
机构：
[1] Forschungszentrum Dresden Rossendorf, Inst Ion Beam Phys & Mat Res, D-01314 Dresden, Germany
[2] Forschungszentrum Dresden Rossendorf, Dresden High Magnet Field Lab, HLD, D-01314 Dresden, Germany
来源：
JOURNAL OF APPLIED PHYSICS | 2008年 / 103卷 / 08期
关键词：
D O I：
10.1063/1.2905236
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
A comprehensive characterization of the structural and magnetic properties of Fe-implanted rutile TiO2(110) is presented. Fe and FeTiO3 (ilmenite) nanocrystals (NCs) are identified by synchrotron-radiation x-ray diffraction. The majority of Fe NCs are crystallographically oriented with respect to the matrix following the relation Fe(001)[010]parallel to TiO2(110)[10]. Postannealing induced the out-diffusion of Fe and the growth of FeTiO3 at the cost of Fe NCs. Mossbauer spectroscopy and superconducting quantum interference device (SQUID) magnetometry reveal the corresponding evolution of magnetic properties, i.e., magnetization, and superparamagnetic blocking temperature. We unambiguously identify Fe NCs as the origin of the ferromagnetism. These Fe NCs possess a uniaxial in-plane magnetic anisotropy, such that the two Fe[100] axes are inequivalent. (c) 2008 American Institute of Physics.
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页数：9
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