Influence of thermal defects on the optical properties of the intermetallic phases NiAl and FeAl

Schlemper, K.; Thomas, Ludwig K.

doi:10.1016/0022-3697(94)90167-8

Cited by 1 publication

(5 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The obtained values for l ͑shown in Table I͒ are smaller than the mean grain sizes in both states, and look more reasonable than the corresponding values obtained by using the same approach with raw data in Ref. 22, i.e., lϷ0.3-0.5 nm.…”

Section: B Optical Properties: Intraband Absorptionsupporting

confidence: 76%

“…22 exceeds the value for sample 3 only by a factor of 1.36, an enhancement in ␥ by more than a factor of 2 due to the structural disordering was observed in our case. Furthermore, contrary to the present result, a small increase in ⍀ P due to disordering in bulk NiAl samples was reported by Schlemper et al 22 The validity of the obtained values for ⍀ P and ␥ can be further supported by investigating the varying tendency of the dc resistivity. The dc resistivity can be written as…”

Section: B Optical Properties: Intraband Absorptioncontrasting

confidence: 54%

“…It should be mentioned here that our results are correlated perfectly with the free-electron parameters obtained by Schlemper and Thomas. 22 While the relaxation frequency for the most disordered sample in Ref. 22 exceeds the value for sample 3 only by a factor of 1.36, an enhancement in ␥ by more than a factor of 2 due to the structural disordering was observed in our case.…”

Section: B Optical Properties: Intraband Absorptioncontrasting

confidence: 43%

“…22 However, in this work, the absolute values of the absorptive part of the dielectric function, ⑀ 2 , were obtained by an indirect way, i.e., by employing the Kramers-Kronig transformation of reflectivity measurements and referring the literature data for the ordered alloy. Furthermore, the disordered samples were obtained by quenching from different temperatures followed by mechanical polishing.…”

Section: Introductionmentioning

confidence: 99%

“…Finally, in Ref. 22, a rather interesting region of the free-electron ͑Drude͒ absorption was not investigated. Therefore, the low-energy side extension of the spectral range for the additional optical study of the ordered and disordered NiAl alloy is needed, especially, by employing a more precise optical tool.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Effect of the structural disorder on the magnetic, transport, and optical properties of B2-phase Ni0.50Al0.50 alloy films

Lee

Kudryavtsev

Nemoshkalenko

et al. 2002

Journal of Applied Physics

View full text Add to dashboard Cite

Dependence of the transport properties on the long range order of β -phase Co 0.50 Ti 0.50 alloy films Influence of a structural disorder in the Co 0.62 Al 0.38 alloy film on the magneto-optical, magnetic, and optical properties J. Appl. Phys. 83, 1575 (1998); 10.1063/1.366868Magneto-optical and optical properties of ordered and disordered Fe-Al alloy filmsThe influence of structural disorder on the magnetic, transport, and optical properties of Ni 0.50 Al 0.50 alloy films has been investigated. A significantly disordered state was obtained by using vapor-quenching deposition onto substrates cooled by liquid nitrogen. The loss of translational invariance in the disordered state leads to a prominent increase of the magnetic moment of alloy below 50 K. This growth can be explained by the appearance of antistructure Ni atoms ͑or their clusters͒ in the disordered state of alloy and their ferromagnetic coupling below 50 K. The temperature dependences of resistivity for both ordered and disordered states of the Ni 0.50 Al 0.50 alloy films exhibit the resistivity minimum at 17-18 K, which has a nonmagnetic nature and can be related mainly to the quantum corrections to the electron-electron interactions in the presence of weak localization. It was shown that the resistivity of the ordered Ni 0.50 Al 0.50 alloy films in 50-300 K temperature range originates mainly from the electron-phonon scattering, while in the disordered state the contribution from the electron-phonon-vibrating impurity scattering becomes dominant. The structural disordering also leads to a noticeable change in the optical properties of alloy, especially in the infrared region. The observed temperature and structural dependences of the resistivity as well as the optical properties in the intraband region confirm the thesis on partial localization of the electronic states near the Fermi level.

show abstract

Section: B Optical Properties: Intraband Absorptionsupporting

confidence: 76%

Section: B Optical Properties: Intraband Absorptioncontrasting

confidence: 54%