Journal ArticleDOI
Coherent potential approximation for partially ordered alloys
TLDR
In this article, an extension of the CPA technique is presented to account for the long-range order of atoms and/or antiferromagnetic solutions for simple cubic or body centred cubic crystallographic structures.Abstract:
An extension of the CPA technique is presented to account for the long-range order of atoms and/or antiferromagnetic solutions for simple cubic or body centred cubic crystallographic structures. Numerical calculations indicate that the influence of the ordering of atoms on the density of states is small for Fe1-xNix alloys. The electronic energy shows that the non-ordered state is favourable. For Cr in antiferromagnetic state is obtained with energy close to the energy of the paramagnetic state. For Cr0.5Fe0.5 alloy the minimum of the free energy corresponds to the fully ordered state, which is a non-magnetic one.read more
Citations
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Journal ArticleDOI
Phase transformations in Fe-Ni Invar alloys
P. L. Rossiter,P. J. Lawrence +1 more
TL;DR: In this paper, the first and second-nearest-neighbour pairwise interaction parameters for Fe-Ni alloys were determined from published neutron diffraction data and found to be ∼ 10 and 10 meV respectively.
Journal ArticleDOI
Magnetic moments for different local atomic configurations in Fe-Cr alloys
TL;DR: In this article, the effect of local atomic configuration is considered and the shift in atomic energy levels due to charge transfer is taken into account, and the continued fractions technique is employed for calculations of the Local Green functions.
Journal ArticleDOI
Coherent potential approximation for the electrical resistivity of partially ordered binary magnetic alloys
F. Goedsche,R. Richter,G. Vojta +2 more
TL;DR: In this paper, the dc electrical resistivity is calculated for a b.c. based random binary substitutional magnetic alloy with partial long-range order for a single-band tight-binding model with diagonal disorder, two kinds of localized spins, arbitrary concentrations and arbitrary order parameter.
Journal ArticleDOI
Electrical and magnetic properties of the FeTi alloy near the order-disorder transition
A. Paja,K Kulakowski +1 more
TL;DR: In this article, the dependence of the electrical conductivity for the 4s and 3d bands and the magnetic moment per atom on the long-range order parameter was obtained by means of the Green functions method within the coherent potential approximation (CPA).
Journal ArticleDOI
Charge Transfer in Chromium‐Transition Metal Alloys
TL;DR: The average T-matrix approximation is applied for calculations of charge transfer of 3D-electrons in transition metal alloys as mentioned in this paper, and the results show that the transfer of electrons from Cr produces a surplus of about 1.1 electrons on V sites.
References
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Journal ArticleDOI
Coherent-Potential Model of Substitutional Disordered Alloys
TL;DR: In this paper, a substitutional alloy based on the concept of an effective or coherent potential was introduced, which, when placed on every site of the alloy lattice, will simulate the electronic properties of the actual alloy.
Journal ArticleDOI
Vibrational Properties of Imperfect Crystals with Large Defect Concentrations
TL;DR: In this paper, a self-consistent method is described within this formalism that is most suitable for large concentrations of mass defects, but even then is not completely satisfactory for low concentrations of light defects.
Journal ArticleDOI
An Application of the Coherent Potential Approximation to Ferromagnetic Alloys
Hideo Hasegawa,Junjiro Kanamori +1 more
TL;DR: In this paper, an application of the coherent potential approximation (CPA) to ferromagnetic alloys is discussed on the basis of a non-degenerate tight-binding model and the intraatomic coulomb interaction is taken into account selfconsistently within the framework of the Hartree-Fock approximation.
Journal ArticleDOI
Calculation of Electronic Structure of Fe Base bcc Ferromagnetic Alloys in the Coherent Potential Approximation
Hideo Hasegawa,Junjiro Kanamori +1 more
TL;DR: In this article, the electronic structure of Ni base ferromagnetic alloys with Co, Fe, Mn and Cr is discussed on the basis of the coherent potential approximation combined with the Hartree-Fock approximation for the electron-electron interaction.
Journal ArticleDOI
Second-Order Phase Transition in a Model Random Alloy
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