SHORT RANGE ORDER IN ANNEALED FexSi1-x AMORPHOUS FILMS

SHORT RANGE ORDER IN ANNEALED FexSi1-x AMORPHOUS FILMS

Magnetic properties of as-prepared (sputtered) and annealed Fe,Sil-, (0.64 5 x 5 0.78) amorphous films deposited at room temperature, are interpreted in terms of chemical short-range order and compared with evaporated films deposited at 77 K. Low temperature ( 5 30 K) magnetization behaviour follows; M (T) / M (0) = 1 B T ~ / ~ c T ~ / ~ 2 with B = 1.5 x K ~ / ~ ; C = -2.610 x ~ K ~ / ~ . Relat...

Short-range order of compressed amorphous GeSe2

The structure of amorphous GeSe2 (a-GeSe2) has been studied by means of a combination of two-edges X-ray absorption spectroscopy (XAS) and angle-dispersive X-ray diffraction under pressures up to about 30 GPa. Multiple-edge XAS data-analysis of a-GeSe2 at ambient conditions allowed us to reconstruct and compare the first-neighbor distribution function with previous results obtained by neutron d...

Measurement and Modeling of Short and Medium Range Order in Amorphous Ta2O5 Thin Films

Amorphous films and coatings are rapidly growing in importance. Yet, there is a dearth of high-quality structural data on sub-micron films. Not understanding how these materials assemble at atomic scale limits fundamental insights needed to improve their performance. Here, we use grazing-incidence x-ray total scattering measurements to examine the atomic structure of the top 50-100 nm of Ta2O5 ...

Spatial variation of short-range order in amorphous intergranular complexions

CHEMICAL SHORT RANGE ORDER IN Fe20Ni60B20 AMORPHOUS ALLOY

We have seen, by Mossbauer spectroscopy, magnetization and resistivity, changes on the physical properties of the aFe20Ni6oB20 alloy induced by thermal relaxation, notedly increases in T, and resistivity. These changes can be explained by modifications of the chemical short range order around Fe favouring the formation of Fe-Ni pairs.