Possible cage motion of interstitial Fe in α-Al 2 O 3

被引：2

作者：

Gunnlaugsson, H. P. ^{[1
]}

Johnston, K. ^{[2
]}

Masenda, H. ^{[3
]}

Mantovan, R. ^{[4
]}

Molholt, T. E. ^{[5
]}

Bharuth-Ram, K. ^{[6
,7
]}

Gislason, H. P. ^{[5
]}

Langouche, G. ^{[8
]}

Madsen, M. B. ^{[9
]}

Naidoo, D. ^{[3
]}

Olafsson, S. ^{[5
]}

Weyer, G. ^{[1
]}

机构：

[1] Aarhus Univ, Dept Phys & Astron, DK-8000 Aarhus C, Denmark

[2] CERN, ISOLDE, Dept Phys, CH-1211 Geneva 23, Switzerland

[3] Univ Witwatersrand, Sch Phys, ZA-2050 Johannesburg, South Africa

[4] IMM CNR, Lab MDM, I-20864 Agrate Brianza, MB, Italy

[5] Univ Iceland, Inst Sci, IS-107 Reykjavik, Iceland

[6] Univ KwaZulu Natal, Sch Phys, ZA-4001 Durban, South Africa

[7] iThemba LABS, ZA-7129 Somerset West, South Africa

[8] Univ Louvain, Inst Kern & Stralingsfys, B-3001 Louvain, Belgium

[9] Univ Copenhagen, Niels Bohr Inst, DK-2100 Copenhagen, Denmark

来源：

HYPERFINE INTERACTIONS | 2013年 / 219卷 / 1-3期

基金：

新加坡国家研究基金会;

关键词：

alpha-Al2O3; Ion-implantation; Mn-57; Emission Mossbauer spectroscopy; MOSSBAUER-SPECTROSCOPY; IMPLANTATION; FE-57; IRON; ALPHA-AL2O3; CO-57;

D O I：

10.1007/s10751-012-0697-1

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：

In addition to spectral components due to Fe2 + and Fe3 + , a single line is observed in emission Mossbauer spectra following low fluence (< 10(15) cm (-aEuro parts per thousand 2)) implantation of Fe-57*, Mn-57 and Co-57 in alpha-Al2O3. For the Co-57 and Mn-57 implantations, the intensity of the single line is found to depend on the emission angle relative to the crystal symmetry axis. This angular dependence can be explained by a non-isotropic f-factor and/or motion of the Fe ion between sites in an interstitial cage. It is argued that interstitial cage motion is a more likely explanation, as this can account for the lack of quadrupole splitting of the line.

引用

页码：33 / 40

页数：8

共 16 条

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