Identification of substitutional and interstitial Fe in 6H-SiC

被引：13
作者：
Gunnlaugsson, H. P.
Bharuth-Ram, K.
Dietrich, M.
Fanciulli, M.
Fynbo, H. O. U.
Weyer, G.
机构：
[1] Aarhus Univ, Inst Phys & Astron, DK-8000 Aarhus C, Denmark
[2] Univ KwaZulu Natal, Sch Phys, ZA-4041 Durban, South Africa
[3] CERN, Div EP, CH-1211 Geneva 23, Switzerland
[4] INFM, Lab Nazl MDM, I-20041 Agrate Brianza, Italy
来源：
HYPERFINE INTERACTIONS | 2006年 / 169卷 / 1-3期
基金：
新加坡国家研究基金会;
关键词：
SiC; Fe defects; Mn-57; Mossbauer spectroscopy;
D O I：
10.1007/s10751-006-9445-8
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：
Iron impurities on interstitial (Fe-i) and substitutional sites (Fe-S) in SiC have been detected by Fe-57 emission Mossbauer spectroscopy following implantation of radioactive Mn-57(+) parent ions. At temperatures < 900 K two Fe-i species are found, assigned to quasi-tetrahedral interstitial sites surrounded by, respectively, four C (Fe-i,Fe-C) or Si atoms (Fe-i,Fe-Si). Above 900 K, the Fe-i,Fe-Si site is proposed to "transform" into the Fe-i,Fe-C site by a single Fe-i jump during the lifetime of the Mossbauer state (T-1/2 = 100 ns). Fe-i,Fe-C and substitutional Fe-S sites are stable up to > 1,070 K.
引用
收藏
页码：1319 / 1323
页数：5
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