Uncovering electron scattering mechanisms in NiFeCoCrMn derived concentrated solid solution and high entropy alloys

URN to cite this document:

urn:nbn:de:bvb:355-epub-403927 Copy

DOI to cite this document:

10.5283/epub.40392 Copy

Mu, Sai ; Samolyuk, German D. ; Wimmer, Sebastian ; Troparevsky, Maria C. ; Khan, Suffian N. ; Mankovsky, Sergiy ; Ebert, Hubert ; Stocks, George M.

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License: Creative Commons Attribution 4.0 PDF - Published Version (1MB)

Date of publication of this fulltext: 02 Jul 2019 08:42

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Details

Item type:	Article
Journal or Publication Title:	npj Computational Materials
Publisher:	Nature Publishing Group
Volume:	5
Number of Issue or Book Chapter:	1
Date:	2019
Institutions:	UNSPECIFIED
Projects:	SFB 1277: Emergente relativistische Effekte in der Kondensierten Materie: Von grundlegenden Aspekten zu elektronischer Funktionalität
Identification Number:	Value Type 10.1038/s41524-018-0138-z DOI
Dewey Decimal Classification:	500 Science > 530 Physics
Status:	Published
Refereed:	Yes, this version has been refereed
Created at the University of Regensburg:	No
Item ID:	40392

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Abstract

Whilst it has long been known that disorder profoundly affects transport properties, recent measurements on a series of solid solution 3d-transition metal alloys reveal two orders of magnitude variations in the residual resistivity. Using ab initio methods, we demonstrate that, while the carrier density of all alloys is as high as in normal metals, the electron mean-free-path can vary from ~10 Å ...

Abstract

Whilst it has long been known that disorder profoundly affects transport properties, recent measurements on a series of solid solution 3d-transition metal alloys reveal two orders of magnitude variations in the residual resistivity. Using ab initio methods, we demonstrate that, while the carrier density of all alloys is as high as in normal metals, the electron mean-free-path can vary from ~10 Å (strong scattering limit) to ~103 Å (weak scattering limit). Here, we delineate the underlying electron scattering mechanisms responsible for this disparate behavior. While site-diagonal, spin dependent, potential scattering is always dominant, for alloys containing only Fe, Co, and Ni the majority-spin channel experiences negligible disorder scattering, thereby providing a short circuit, while for Cr/Mn containing alloys both spin channels experience strong disorder scattering due to an electron filling effect. Somewhat surprisingly, other scattering mechanisms—including displacement, or size effect, scattering which has been shown to strongly correlate with such diverse properties as yield strength—are found to be relatively weak in most cases.

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Metadata last modified: 25 Nov 2020 17:55

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