Cluster-Expansion Model for Complex Quinary Alloys: Application to Alnico Permanent Magnets

Nguyen, Manh Cuong; Zhou, Lin; Tang, Wei; Kramer, Matthew J.; Anderson, Iver E.; Wang, Cai -Zhuang; Ho, Kai -Ming

doi:10.1103/PhysRevApplied.8.054016

Title: Cluster-Expansion Model for Complex Quinary Alloys: Application to Alnico Permanent Magnets

Journal Article · Wed Nov 08 00:00:00 EST 2017 · Physical Review Applied

DOI:https://doi.org/10.1103/PhysRevApplied.8.054016· OSTI ID:1461654

Nguyen, Manh Cuong ^[1]; Zhou, Lin ^[1]; Tang, Wei ^[1]; Kramer, Matthew J. ^[1]; Anderson, Iver E. ^[1]; Wang, Cai -Zhuang ^[1]; Ho, Kai -Ming ^[1]

Ames Lab. and Iowa State Univ., Ames, IA (United States)

An accurate and transferable cluster-expansion model for complex quinary alloys is developed. Lattice Monte Carlo simulation enabled by this cluster-expansion model is used to investigate temperature-dependent atomic structure of alnico alloys, which are considered as promising high-performance non-rare-earth permanent-magnet materials for high-temperature applications. The results of the Monte Carlo simulations are consistent with available experimental data and provide useful insights into phase decomposition, selection, and chemical ordering in alnico. The simulations also reveal a previously unrecognized D0₃ alloy phase. This phase is very rich in Ni and exhibits very weak magnetization. In conclusion, manipulating the size and location of this phase provides a possible route to improve the magnetic properties of alnico, especially coercivity.

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Research Organization:: Ames Lab., Ames, IA (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE)

Grant/Contract Number:: AC02-07CH11358

OSTI ID:: 1461654

Alternate ID(s):: OSTI ID: 1408065

Report Number(s):: IS-J-9496; PRAHB2; TRN: US1902033

Journal Information:: Physical Review Applied, Vol. 8, Issue 5; ISSN 2331-7019

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 7 works

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Robust cluster expansion of multicomponent systems using structured sparsity Leong, Zhidong; Tan, Teck Leong Physical Review B, Vol. 100, Issue 13 https://doi.org/10.1103/physrevb.100.134108	journal	October 2019
Robust cluster expansion of multicomponent systems using structured sparsity Leong, Zhidong; Tan, Teck Leong arXiv https://doi.org/10.48550/arxiv.1910.08086	text	January 2019

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