A CEMS search for precipitate formation in 57Fe implanted ZnO

被引：3
|
作者：
Bharuth-Ram, Krishanlal [1 ]
Masenda, Hilary [2 ]
Doyle, Terence B. [1 ,3 ]
Geburt, Sebastian [4 ]
Ronning, Carsten [4 ]
Gunnlaugsson, Harald Palle [5 ]
机构：
[1] Univ KwaZulu Natal, Sch Phys, ZA-4041 Durban, South Africa
[2] Univ Witwatersrand, Sch Phys, WITS, ZA-2050 Johannesburg, South Africa
[3] IThemba LABS, ZA-7129 Somerset W, Western Cape, South Africa
[4] Univ Jena, Inst Solid State Phys, D-07743 Jena, Germany
[5] Aarhus Univ, Dept Phys & Astron, DK-8000 Aarhus, Denmark
来源：
HYPERFINE INTERACTIONS | 2012年 / 207卷 / 1-3期
基金：
新加坡国家研究基金会;
关键词：
ZnO; Fe-57; implanted; CEMS; Nano-precipitates; MAGNETIC SEMICONDUCTORS;
D O I：
10.1007/s10751-011-0403-8
中图分类号：
O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号：
070203 ; 070304 ; 081704 ; 1406 ;
摘要：
Conversion electron Mossbauer Spectroscopy measurements have been made on ZnO single crystals implanted with 60 keV Fe-57 to 4 and 8 at.% peak concentrations, and annealed up to 800 degrees C. The spectra show quite strong changes with annealing, but no evidence of magnetic components, thus precluding the formation of large sized precipitates or secondary phases. Above an annealing temperature of 650 degrees C, the dominant spectral component is a doublet with hyperfine parameters typical of Fe3+, which is attributed to Fe3+ ions in nano-precipitates similar to 5 nm in size.
引用
收藏
页码：49 / 52
页数：4
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