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Atomic structure and domain wall pinning in samarium-cobalt-based permanent magnets

Duerrschnabel, Michael ; Yi, Min ; Uestuener, Kaan ; Liesegang, M. ; Katter, Matthias ; Kleebe, Hans‐Joachim ; Xu, Bai-Xiang ; Gutfleisch, Oliver ; Molina-Luna, Leopoldo (2022):
Atomic structure and domain wall pinning in samarium-cobalt-based permanent magnets. (Publisher's Version)
In: Nature Communications, 8 (1), Springer Nature, ISSN 2041-1723,
DOI: 10.26083/tuprints-00020487,
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Item Type: Article
Origin: Secondary publication service
Status: Publisher's Version
Title: Atomic structure and domain wall pinning in samarium-cobalt-based permanent magnets
Language: English
Abstract:

A higher saturation magnetization obtained by an increased iron content is essential for yielding larger energy products in rare-earth Sm₂Co₁₇-type pinning-controlled permanent magnets. These are of importance for high-temperature industrial applications due to their intrinsic corrosion resistance and temperature stability. Here we present model magnets with an increased iron content based on a unique nanostructure and -chemical modification route using Fe, Cu, and Zr as dopants. The iron content controls the formation of a diamond-shaped cellular structure that dominates the density and strength of the domain wall pinning sites and thus the coercivity. Using ultra-high-resolution experimental and theoretical methods, we revealed the atomic structure of the single phases present and established a direct correlation to the macroscopic magnetic properties. With further development, this knowledge can be applied to produce samarium cobalt permanent magnets with improved magnetic performance.

Journal or Publication Title: Nature Communications
Volume of the journal: 8
Issue Number: 1
Publisher: Springer Nature
Collation: 7 Seiten
Classification DDC: 500 Naturwissenschaften und Mathematik > 550 Geowissenschaften
Divisions: 11 Department of Materials and Earth Sciences > Earth Science > Geo-Material-Science
11 Department of Materials and Earth Sciences > Material Science > Functional Materials
11 Department of Materials and Earth Sciences > Material Science > Mechanics of functional Materials
Date Deposited: 09 Feb 2022 13:14
Last Modified: 09 Feb 2022 14:04
DOI: 10.26083/tuprints-00020487
Corresponding Links:
URN: urn:nbn:de:tuda-tuprints-204873
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/20487
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