Josten, Nicolas; Noorzayee, Sakia; Miroshkina, Olga; Zingsem, Benjamin; Acet, Mehmet; Wiedwald, Ulf; Çaklr, Asll; Gruner, Markus; Farle, Michael:
Emergence of net magnetization by magnetic field biased diffusion in antiferromagnetic L10 NiMn
In: Physical Review B, Vol. 107 (2023), No. 17, Article 174417
2023article/chapter in journalOA Hybrid
Physics (incl. Astronomy)Faculty of Physics » Experimental PhysicsScientific institutes » Center for Nanointegration Duisburg-Essen (CENIDE)
Related: 1 publication(s)
Title in English:
Emergence of net magnetization by magnetic field biased diffusion in antiferromagnetic L10 NiMn
Author:
Josten, NicolasUDE
LSF ID
61435
ORCID
0009-0005-8543-8603ORCID iD
Other
connected with university
corresponding author
;
Noorzayee, Sakia
;
Miroshkina, OlgaUDE
LSF ID
61286
ORCID
0000-0003-2225-8726ORCID iD
Other
connected with university
;
Zingsem, BenjaminUDE
LSF ID
59828
ORCID
0000-0002-9899-2700ORCID iD
Other
connected with university
;
Acet, MehmetUDE
LSF ID
2917
ORCID
0000-0003-3601-1601ORCID iD
Other
connected with university
;
Wiedwald, UlfUDE
GND
130011681
LSF ID
3609
ORCID
0000-0002-3209-4078ORCID iD
Other
connected with university
;
Çaklr, Asll
;
Gruner, MarkusUDE
GND
128899808
LSF ID
10281
ORCID
0000-0002-2306-1258ORCID iD
Other
connected with university
;
Farle, MichaelUDE
GND
1029383219
LSF ID
3560
ORCID
0000-0002-1864-3261ORCID iD
Other
connected with university
Year of publication:
2023
Open Access?:
OA Hybrid
arXiv.org ID
Web of Science ID
Scopus ID
Language of text:
English

Abstract in English:

NiMn is a collinear antiferromagnet with high magnetocrystalline anisotropy (K=-9.7×105Jm-3). Through magnetic annealing of NiMn with excess Ni, strongly pinned magnetic moments emerge due to an imbalance in the distribution of Ni in the antiferromagnetic Mn sublattices. The results are explained with a model of magnetic field biased diffusion, supported by ab initio calculations. Another observation is the oxidation of Mn at the surface, causing an enrichment of Ni in the subsurface region. This leads to an additional ferromagnetic response appearing in the magnetization measurements, which can be removed by surface polishing.