Medium range order from total and partial pair correlation functions of Ni62Nb38and Ni65B35metallic glasses

The short range order in several structural models for amorphous alloys is investigated with respect to pair correlation functions, bond angle distributions and other properties. Despite of the different principles of modelling, the topological short range order turned out to be almost identical. Therefore also the question for the triplet correlations to some extent is found solved. Remaining differences thus consist regarding more complex correlations among the atoms.

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Electron Speckle and Higher-Order Correlation Functions from Amorphous Thin Films

MRS Proceedings ◽

10.1557/proc-455-349 ◽

1996 ◽

Vol 455 ◽

Cited By ~ 2

Author(s):

J. Murray Gibson ◽

M. M. J. Treacy ◽

D. Loretto

Keyword(s):

Correlation Functions ◽

Structural Changes ◽

Higher Order ◽

Amorphous Semiconductor ◽

Amorphous Semiconductors ◽

Range Order ◽

Semiconductor Films ◽

Medium Range Order ◽

Medium Range ◽

Three Body

ABSTRACTWe obtain valuable information about medium-range order in amorphous semiconductors from variable coherence microscopy, a new quantitative approach to TEM. The technique reveals three-body and higher-order atomic correlation functions, which are sensitive to medium-range order. Preliminary experimental evidence for structural changes on annealing has been found for amorphous semiconductor films, with pronounced medium-range order seen only in unannealed films.

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Short and Medium-Range Order in Liquid Ternary Al80Co10Ni10, Al72.5Co14.5Ni13, and Al65Co17.5Ni17.5 Alloys

Zeitschrift für Naturforschung A ◽

10.1515/zna-2010-1-214 ◽

2010 ◽

Vol 65 (1-2) ◽

pp. 123-131 ◽

Cited By ~ 2

Author(s):

Oleksandr S. Roik ◽

Oleksiy Samsonnikov ◽

Volodymyr Kazimirov ◽

Volodymyr Sokolskii

Keyword(s):

Three Dimensional ◽

Range Order ◽

Ternary Alloys ◽

X Ray Diffraction ◽

Medium Range Order ◽

Intermediate Range Order ◽

Transition Metal Atoms ◽

Medium Range ◽

Three Dimensional Models ◽

Co Alloys

AbstractA local short-to-intermediate range order of liquid Al80Co10Ni10, Al72.5Co14.5Ni13, and Al65Co17.5Ni17.5 alloys was examined by X-ray diffraction and the reverse Monte Carlo modelling. The comprehensive analysis of three-dimensional models of the liquid ternary alloys was performed by means of the Voronoi-Delaunay method. The existence of a prepeak on the S(Q) function of the liquid alloys is caused by medium range ordering of 3d-transition metal atoms in dense-packed polytetrahedral clusters at temperatures close to the liquidus. The non-crystalline clusters, represented by aggregates of pentagons that consist of good tetrahedra, and chemical short-range order lead to the formation of the medium range order in the liquid binary Al-Ni, Al-Co and ternary Al-Ni-Co alloys.

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Medium-range order in amorphous ices revealed by persistent homology

Journal of Physics Condensed Matter ◽

10.1088/1361-648x/ab3820 ◽

2019 ◽

Vol 31 (45) ◽

pp. 455403 ◽

Cited By ~ 1

Author(s):

Sungyeon Hong ◽

Donghun Kim

Keyword(s):

Persistent Homology ◽

Range Order ◽

Medium Range Order ◽

Medium Range ◽

Amorphous Ices

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The Structure of Ion-Implanted Amorphous Silicon

MRS Proceedings ◽

10.1557/proc-540-27 ◽

1998 ◽

Vol 540 ◽

Cited By ~ 4

Author(s):

J. M. Gibson ◽

J-Y. Cheng ◽

P. Voyles ◽

M.M.J. TREACY ◽

D.C. Jacobson

Keyword(s):

Amorphous Silicon ◽

Network Model ◽

Random Network ◽

Amorphous Semiconductors ◽

Range Order ◽

Medium Range Order ◽

Medium Range ◽

Large Heat ◽

Continuous Random Network ◽

Ion Implanted

AbstractUsing fluctuation microscopy, we show that ion-implanted amorphous silicon has more medium-range order than is expected from the continuous random network model. From our previous work on evaporated and sputtered amorphous silicon, we conclude that the structure is paracrystalline, i.e. it possesses crystalline-like order which decays with distance from any point. The observation might pose an explanation for the large heat of relaxation that is evolved by ion-implanted amorphous semiconductors.

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