Short range order and the development of long range order in Ni4Mo

Chakravarti, B.; Starke, E.A.; Sparks, C. J.; Williams, R.O.

doi:10.1016/s0022-3697(74)80157-5

Cited by 53 publications

(9 citation statements)

References 15 publications

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“…This shows emphatically how the conductivity increases as the number of like late TM nearest neighbors increases. This effect is consistent with the experimental observation that quenched samples of these materials (in these materials SRO is present according to X-ray experiments [97,99,100]) show a higher residual resistivity than the cold-worked samples. The cold-working leads to a decrease of the SRO and segregation of solute atoms around defects in the samples and therefore increases the probability of having like atoms sitting next to each other.…”

Section: à1 Ksupporting

confidence: 91%

“…It follows that there is an increased bandwidth, larger Fermi velocity and therefore a bigger contribution to the conductivity for this situation. It is therefore sensible to discuss primarily the effect on the resistivity of varying the number of like nearest neighbors and not to address the more subtle effects that might arise from short-range order that may establish over longer length scales [93,97].…”

Section: à1 Kmentioning

confidence: 99%

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Electronic and transport properties of disordered transition‐metal alloys

Ködderitzsch

Lowitzer

Staunton

et al. 2011

Physica Status Solidi (b)

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We present a first-principles approach to describe electronic transport of disordered alloys in a material specific way. The electronic structure is represented in terms of the relativistic multiple scattering KKR-Green function. Disorder with possible inclusion of short-ranged order effects is taken into account by the coherent-potential approximation or its nonlocal formulation. A salient feature of the presented method is the possibility to combine it with a linear response Kubo framework, allowing for a detailed investigation of many transport phenomena which are of immediate relevance for applications in which electrons and/or their spin are manipulated. This is illustrated by several examples and developments, among them the description of the residual resistivity of Kstate-and ferromagnetic alloys. Inclusion of relativistic effects by using the Dirac-formalism represents the basis to deal with the anomalous Hall effect and to derive a relativistic spinprojection scheme for currents.

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Section: à1 Ksupporting

confidence: 91%

Section: à1 Kmentioning

confidence: 99%

Electronic and transport properties of disordered transition‐metal alloys

Ködderitzsch

Lowitzer

Staunton

et al. 2011

Physica Status Solidi (b)

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“…Considerable transmission electron microscopy (TEM) and theoretical work has been carried out on these alloys over the last four decades. [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] Significant controversy exists in the literature, pertaining mainly to the nature and the origin of the quenched-in shortrange-ordered (SRO) state in Ni-rich binary alloys and to the evolution of the long-range-ordered (LRO) phases from the state of SRO.…”

Section: Introductionmentioning

confidence: 99%

Effect of Ternary Additions on the Stability of Ordered Phases in Ni-Mo Alloys—Transmission Electron Microscopy Results and First Principles Calculations

Arya

Kulkarni

Dey

et al. 2007

Metall Mater Trans A

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The ordering behavior of a Ni-Mo alloy in the presence of ternary additives X (X = Al, Cr, Mn, V) has been studied using transmission electron microscopy (TEM) as well as first-principles calculations using the tight-binding-linear muffin tin orbital (TB-LMTO) method. The sequence of ordering transformations in binary Ni-Mo alloys has been shown earlier to be controlled by a competition between several fcc-based superlattices, viz. Ni 2 Mo (Pt 2 Mo type), Ni 3 Mo (D0 22 ), Ni 4 Mo (D1 a ), and the so-called short-range ordered (SRO) structure characterized by the presence of {1½0} reflections. These ternary additives have been observed to stabilize the Ni 3 Mo (D0 22 ) phase compared to the Ni 2 Mo + Ni 4 Mo phase mixture, leading to a sequence of transformation different from that obtained in binary alloys. The calculated energies of formation were observed to conform to the experimentally observed stability hierarchy in these binary intermetallics and their ternary analogues. The third element stabilizes the D0 22 structure by contributing to the covalent component of bonding in these compounds.

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“…Dark-field images in the SRO spots were first shown by Ruedl, Delavignette & Amelinckx (1968) to be spotty and attributed to the occurrence of microdomains of the different orientation variants. Later this was confirmed and discussed by a number of authors (Moss & Clapp, 1968;Okamoto & Thomas, 1971;Das & Thomas, 1974;Chakravarti, Starke, Sparks & Williams, 1974).…”

Section: The Ni-mo Systemmentioning

confidence: 67%

A cluster model for the transition from the short-range order to the long-range order state in f.c.c. based binary systems and its study by means of electron diffraction

Ridder¹,

Tendeloo²,

Amelinckx³

1976

Acta Cryst Sect A

169

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The 'transition' state in binary, f.c.c, based systems is assumed to be characterized by the repetition of interpenetrating polyhedral clusters of atoms occupying lattice sites and having the macroscopic composition. Its mathematical formulation leads to relations between the short-range order (SRO) coefficients, which in turn impose conditions on the distribution in reciprocal space of the diffuse intensity as observed in electron diffraction patterns. It follows that for a given cluster type the diffuse intensity can only differ from zero along certain surfaces or curves. The effect of deviations from the ideal composition of the clusters is briefly discussed. The theory allows an explanation of available diffraction data on certain binary alloys in the initial stages of ordering i.e. in the 'transition' state between the SRO state and the long-range order (LRO) state.

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Short range order and the development of long range order in Ni4Mo

Cited by 53 publications

References 15 publications

Electronic and transport properties of disordered transition‐metal alloys

Electronic and transport properties of disordered transition‐metal alloys

Effect of Ternary Additions on the Stability of Ordered Phases in Ni-Mo Alloys—Transmission Electron Microscopy Results and First Principles Calculations

A cluster model for the transition from the short-range order to the long-range order state in f.c.c. based binary systems and its study by means of electron diffraction

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