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Growth, structure, and magnetic properties of γ′-Fe4Nγ′-Fe4N thin films

Dirba, I. and Yazdi, M. Baghaie and Radetinac, A. and Komissinskiy, P. and Flege, S. and Gutfleisch, O. and Alff, L. (2015):
Growth, structure, and magnetic properties of γ′-Fe4Nγ′-Fe4N thin films.
In: Journal of Magnetism and Magnetic Materials, Elsevier Science Publishing, pp. 151-155, 379, ISSN 03048853,
[Online-Edition: http://dx.doi.org/10.1016/j.jmmm.2014.12.033],
[Article]

Abstract

We have grown phase-pure, buffer-free, and epitaxial α -Fe and γ′-Fe4Nγ′-Fe4N thin films by RF magnetron sputtering onto MgO (100) substrates. The film thicknesses and densities have been determined with high accuracy by evaluating the Kiessig fringes of the X-ray reflectometry measurements. We have determined the volume saturation magnetization of γ′-Fe4Nγ′-Fe4N with corresponding accuracy to be View the MathML sourceMs=1556±62emu/cm3 at 10 K or View the MathML source2.30±0.09μB per Fe atom. The Curie-temperature, TCTC, of the γ′-Fe4Nγ′-Fe4N thin films was 716 K. The slightly increased average magnetic moment per Fe atom of γ′-Fe4Nγ′-Fe4N as compared to α-Fe is in agreement with literature values and attributed to the volume expansion of the unit cell.

Item Type: Article
Erschienen: 2015
Creators: Dirba, I. and Yazdi, M. Baghaie and Radetinac, A. and Komissinskiy, P. and Flege, S. and Gutfleisch, O. and Alff, L.
Title: Growth, structure, and magnetic properties of γ′-Fe4Nγ′-Fe4N thin films
Language: English
Abstract:

We have grown phase-pure, buffer-free, and epitaxial α -Fe and γ′-Fe4Nγ′-Fe4N thin films by RF magnetron sputtering onto MgO (100) substrates. The film thicknesses and densities have been determined with high accuracy by evaluating the Kiessig fringes of the X-ray reflectometry measurements. We have determined the volume saturation magnetization of γ′-Fe4Nγ′-Fe4N with corresponding accuracy to be View the MathML sourceMs=1556±62emu/cm3 at 10 K or View the MathML source2.30±0.09μB per Fe atom. The Curie-temperature, TCTC, of the γ′-Fe4Nγ′-Fe4N thin films was 716 K. The slightly increased average magnetic moment per Fe atom of γ′-Fe4Nγ′-Fe4N as compared to α-Fe is in agreement with literature values and attributed to the volume expansion of the unit cell.

Journal or Publication Title: Journal of Magnetism and Magnetic Materials
Volume: 379
Publisher: Elsevier Science Publishing
Uncontrolled Keywords: Magnetic properties of monolayers and thin films, Saturation moments, nd magnetic susceptibilities, Magnetic anisotropy, Fe and its alloys, Deposition by sputtering
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Advanced Thin Film Technology
11 Department of Materials and Earth Sciences > Material Science > Material Analytics
11 Department of Materials and Earth Sciences > Material Science > Functional Materials
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 10 Feb 2015 09:24
Official URL: http://dx.doi.org/10.1016/j.jmmm.2014.12.033
Identification Number: doi:10.1016/j.jmmm.2014.12.033
Funders: I. D. thanks the BMBF for financial support within the project 03X3582., The authors thank the LOEWE project RESPONSE funded by the HMWK.
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