Journal Article

FZJ-2024-02848

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Crucial role of Fe in determining the hard magnetic properties of Nd 2 Fe 14 B

Bouaziz, J. (Corresponding author)FZJ* ; Patrick, C. E. ; Staunton, J. B.

2023
Inst. Woodbury, NY

This record in other databases:    

Please use a persistent id in citations: doi:10.1103/PhysRevB.107.L020401  doi:10.34734/FZJ-2024-02848

Abstract: Nd2Fe14B's unsurpassed, hard magnetic properties for a wide range of temperatures result from a combination of a large volume magnetization from Fe and a strong single-ion anisotropy from Nd. Here, using finite temperature first-principles calculations, we focus on the other crucial roles played by the Fe atoms in maintaining the magnetic order on the Nd sublattices, and hence the large magnetic anisotropy, and directly generating significant uniaxial anisotropy at high temperatures. We identify effective spins for atomistic modeling from the material's interacting electrons and quantify pairwise and higher order, nonpairwise magnetic interactions among them. We find the Nd spins couple most strongly to spins on sites belonging to two specific Fe sublattices: 8j1 and 8j2. Moreover, the Fe 8j1 sublattice also provides the electronic origin of the unusual, nonmonotonic temperature dependence of the anisotropy of Y2Fe14B. Our work provides atomic-level resolution of the properties of this fascinating magnetic material.

---

Contributing Institute(s):

1. Quanten-Theorie der Materialien (PGI-1)
2. Quanten-Theorie der Materialien (IAS-1)

Research Program(s):

1. 5211 - Topological Matter (POF4-521) (POF4-521)

Appears in the scientific report 2024

---

Database coverage:
; ; ; Clarivate Analytics Master Journal List ; Current Contents - Electronics and Telecommunications Collection ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

---