Mossbauer spectroscopy, magnetic, and ab-initio study of the approximant Al76Ni9Fe15 to a decagonal Al-Ni-Fe quasicrystal

被引：12

作者：

Nejadsattari, Farshad ^{[1
]}

Stadnik, Zbigniew M. ^{[1
]}

Przewoznik, Janusz ^{[2
]}

Grushko, Benjamin ^{[3
]}

机构：

[1] Univ Ottawa, Dept Phys, Ottawa, ON K1N 6N5, Canada

[2] AGH Univ Sci & Technol, Fac Phys & Appl Comp Sci, Dept Solid State Phys, PL-30059 Krakow, Poland

[3] PGI 5 Forschungszentrum Julich, D-52425 Julich, Germany

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2016年 / 662卷

基金：

加拿大自然科学与工程研究理事会;

关键词：

Paramagnet; Fe-57 Mossbauer spectroscopy; Electric quadrupole splitting; Pseudogap in the density of states; Debye temperature; ELECTRIC-FIELD GRADIENT; DIFFUSE-SCATTERING; MICROSCOPY; ENERGY; PHASES; CO;

D O I：

10.1016/j.jallcom.2015.12.115

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The structural, magnetic, and Mossbauer spectral properties of the approximant Al76Ni9Fe15 to a decagonal Al-Ni-Fe quasicrystal, complemented by ab-initio electronic structure and the hyperfine-interaction parameters calculations, are reported. The approximant studied crystallizes in the monoclinic space group C2/m with the lattice parameters a = 15.3898(3) angstrom, b = 8.0840(2) angstrom, c = 12.4169(2) angstrom, and beta = 107.870(2)degrees. The existence of a pseudogap in the calculated electronic density of states slightly above the Fermi level suggests electronic stabilization according to the Hume-Rothery-type mechanism. High metallicity of Al76Ni9Fe15 is predicted. Both the Mossbauer spectra and magnetic susceptibility data indicate that Al76Ni9Fe15 is a paramagnet down to 2.0 K. The presence of the distribution of the electric quadrupole splitting in the Mossbauer spectra measured in the temperature range 4.5-296.1 K is observed. The increase of the average quadrupole splitting with decreasing temperature is well described by a T-3/2 power-law relation. The Debye temperature of Al76Ni9Fe15 is found to be 431(3) K. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：612 / 620

页数：9

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