The influence of B variation on the electronic properties of Al sub(3)Ni sub(20)B sub()x(6< =x< =12)

We investigated the influence of B variation on the structural, thermal, and electronic properties of the ternary intermetallics Al sub(3)Ni sub(20)B sub()x(x=6,7,...,12). On increasing the metalloid content, the cubic unit-cell parameter (space group [MathML equation]) is observed to increase linea...

Full description

Saved in:
Bibliographic Details
Published in:Journal of alloys and compounds 2010-06, Vol.499 (1), p.11-16
Main Authors: Elhadi, M, ElMassalami, M, Takeya, H, Rapp, R E, Chaves, FAB, Elzubair, A
Format: Article
Language:English
Subjects:
Alloys
Electrical resistivity
Electronic properties
Evolution
Magnetism
Mathematical analysis
Nickel
Superconductivity
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We investigated the influence of B variation on the structural, thermal, and electronic properties of the ternary intermetallics Al sub(3)Ni sub(20)B sub()x(x=6,7,...,12). On increasing the metalloid content, the cubic unit-cell parameter (space group [MathML equation]) is observed to increase linearly. Down to 2 K (for selected cases down to 120 mK), no evidence of superconductivity or (de)localized magnetism is observed in any of the studied samples; rather, all exhibit a nonmagnetic and metallic character. Furthermore, the Pauli susceptibilities, the coefficients of the specific heats, and the coefficients of the resistivities are found to correlate strongly (but non-montonically) with the percentage of the Ni content per unit formula (the Ni 3d band is the dominant contributor to the density of states N(E sub()F). Such a non-monotonic evolution of the electronic properties is attributed to a corresponding non-monotonic character of the N(E) curve within the neighborhood of E sub()F
ISSN:0925-8388
DOI:10.1016/j.jallcom.2010.03.051