Low-temperature investigation of paramagnetic centres in tetrahedral amorphous carbon deposited by S-bend FCVA

被引：4

作者：

Fanchini, G

Tagliaferro, A

Dasgupta, D

Laurenti, E

Ferrari, AC

Teo, KBK

Milne, WI

Robertson, J

机构：

[1] Politecn Torino, Dipartimento Fis, I-10129 Turin, Italy

[2] Politecn Torino, Unita INFM, I-10129 Turin, Italy

[3] Univ Turin, Dip Chim IFM, I-10125 Turin, Italy

[4] Univ Cambridge, Dept Engn, Cambridge CB2 1PZ, England

[5] N Bengal Univ, Dept Phys, Siliguri, India

来源：

JOURNAL OF NON-CRYSTALLINE SOLIDS | 2002年 / 299卷

关键词：

D O I：

10.1016/S0022-3093(01)01102-4

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The electron-spin-resonance (ESR) features of tetrahedral amorphous carbon (ta-C) samples deposited by S-bend filtered cathodic vacuum are (FCVA) are investigated in a wide temperature range (4.3-295 K) before and after post-deposition annealing at 500 degreesC. Special attention is given to the temperature dependence of the linewidths. While the sp(3) content does not change with annealing, the temperature trend of the linewidth becomes much smoother for post-deposition annealed samples. The results are discussed in terms of different possible mechanisms of motional line-narrowing and line-narrowing due to hopping motion. (C) 2002 Elsevier Science B.V. All rights reserved.

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页码：840 / 845

页数：6

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