Calculation of Short-Range-Order diffuse intensity for a two dimensional square lattice within cluster variation method

H. Uzawa; T. Mohri

doi:10.2320/matertrans.42.422

Calculation of Short-Range-Order diffuse intensity for a two dimensional square lattice within cluster variation method

H. Uzawa, T. Mohri

Institute for Materials Research (IMR)

Research output: Contribution to journal › Article › peer-review

15 Citations (Scopus)

Abstract

The Cluster Variation Method (CVM) within the square approximation is employed to calculate Short-Range-Order diffuse intensity spectrum for a binary alloy in a two dimensional square lattice. The peak intensity at 1 : 1 stoichiometric composition is attained at (k_x, k_y) = (0.5, 0.5) in the k-space. The instability temperature determined by the calculation of the Short-Range-Order diffuse intensity coincides with the phase boundary, indicating that the transition is of second-order. The integrated intensity in a Brillouin zone is also calculated to examine the level of the approximation.

Original language	English
Pages (from-to)	422-424
Number of pages	3
Journal	Materials Transactions
Volume	42
Issue number	3
DOIs	https://doi.org/10.2320/matertrans.42.422
Publication status	Published - 2001

Keywords

Cluster variation method
Concentration wave
Instability temperature
Ordering wave
Short-range-order diffuse intensity
Square approximation
Square lattice

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.2320/matertrans.42.422

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title = "Calculation of Short-Range-Order diffuse intensity for a two dimensional square lattice within cluster variation method",

abstract = "The Cluster Variation Method (CVM) within the square approximation is employed to calculate Short-Range-Order diffuse intensity spectrum for a binary alloy in a two dimensional square lattice. The peak intensity at 1 : 1 stoichiometric composition is attained at (kx, ky) = (0.5, 0.5) in the k-space. The instability temperature determined by the calculation of the Short-Range-Order diffuse intensity coincides with the phase boundary, indicating that the transition is of second-order. The integrated intensity in a Brillouin zone is also calculated to examine the level of the approximation.",

keywords = "Cluster variation method, Concentration wave, Instability temperature, Ordering wave, Short-range-order diffuse intensity, Square approximation, Square lattice",

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AB - The Cluster Variation Method (CVM) within the square approximation is employed to calculate Short-Range-Order diffuse intensity spectrum for a binary alloy in a two dimensional square lattice. The peak intensity at 1 : 1 stoichiometric composition is attained at (kx, ky) = (0.5, 0.5) in the k-space. The instability temperature determined by the calculation of the Short-Range-Order diffuse intensity coincides with the phase boundary, indicating that the transition is of second-order. The integrated intensity in a Brillouin zone is also calculated to examine the level of the approximation.

KW - Cluster variation method

KW - Concentration wave

KW - Instability temperature

KW - Ordering wave

KW - Short-range-order diffuse intensity

KW - Square approximation

KW - Square lattice

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Calculation of Short-Range-Order diffuse intensity for a two dimensional square lattice within cluster variation method

Abstract

Keywords

ASJC Scopus subject areas

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