ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
In this work, we present a study of the spin disorder resistivity ( ρm∞) and the electronicspecific heat coefficient ( γ) in Gd4(Co1-xCux)3 compounds, with x = 0, 0.05, 0.10, 0.20, 0.30. Theexperimental results show a strongly non-linear dependence of ρm∞ on the de Gennes factor which,in similar intermetallic compounds, is usually attributed to the existence of spin fluctuations on theCo 3d bands and its amplification by the thermal disorder of the Gd magnetic moments through theGd-Co exchange coupling. Using a novel combined analysis of ρm∞ and γ, we show, however, thatonly electron band structure changes are involved in the anomalous behaviour of ρm∞ and that alinear dependence of ρm∞ on the de Gennes factor is obtained when the variation of the effectivemass is properly taken into account
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/19/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.587-588.333.pdf
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