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Electron transport in Al65Cu20Co15-xFex quasicrystals

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Title Electron transport in Al65Cu20Co15-xFex quasicrystals
 
Creator SINGH, K
BAHADUR, D
RADHA, S
NIGAM, AK
PRASAD, S
 
Subject quasi-crystals
al-mn
alloys
localization
phase
quasicrystals
magnetoresistance
weak localization
electrical resistivity
 
Description We have studied the electrical resistivity and magnetoresistance for the system Al65Cu20Co15-xFex (0 less than or equal to x less than or equal to 15). The sample with x=0 could be indexed as the decagonal (D) phase, whereas the sample with x=15 forms the icosahedral (I) phase. The sample with intermediate x (2.5 less than or equal to x less than or equal to 12.5), however, consists of both phases. The temperature coefficient of the resistivity (TCR) is positive when x less than or equal to 17.5. The magnitude of the TCR for these samples is smaller than for icosahedral alloys. However, the other samples exhibit a negative TCR except below 30 K. The magnetoresistance of the samples with pure I or D phase, exhibits an increase of over 1% in a field of 45 kOe. The samples with intermediate x on the other hand, show relatively smaller increases. These results have been analyzed qualitatively in the framework of existing models. (C) 1997 Elsevier Science S.A.
 
Publisher ELSEVIER SCIENCE SA LAUSANNE
 
Date 2011-07-29T06:33:49Z
2011-12-26T12:48:30Z
2011-12-27T05:42:25Z
2011-07-29T06:33:49Z
2011-12-26T12:48:30Z
2011-12-27T05:42:25Z
1997
 
Type Article
 
Identifier JOURNAL OF ALLOYS AND COMPOUNDS, 257(1-2), 57-61
0925-8388
http://dx.doi.org/10.1016/S0925-8388(97)00004-2
http://dspace.library.iitb.ac.in/xmlui/handle/10054/7619
http://hdl.handle.net/10054/7619
 
Language en