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Thin film phase diagram of iron nitrides grown by molecular beam epitaxy

Gölden, D. ; Hildebrandt, E. ; Alff, L. (2017)
Thin film phase diagram of iron nitrides grown by molecular beam epitaxy.
In: Journal of Magnetism and Magnetic Materials, 422
doi: 10.1016/j.jmmm.2016.07.074
Article, Bibliographie

Abstract

A low-temperature thin film phase diagram of the iron nitride system is established for the case of thin films grown by molecular beam epitaxy and nitrided by a nitrogen radical source. A fine-tuning of the nitridation conditions allows for growth of α′α′-Fe8Nx with increasing c/ac/a-ratio and magnetic anisotropy with increasing x until almost phase pure α′α′-Fe8N1 thin films are obtained. A further increase of nitrogen content below the phase decomposition temperature of α′α′-Fe8N (180 °C) leads to a mixture of several phases that is also affected by the choice of substrate material and symmetry. At higher temperatures (350 °C), phase pure γ′γ′-Fe4N is the most stable phase.

Item Type: Article
Erschienen: 2017
Creators: Gölden, D. ; Hildebrandt, E. ; Alff, L.
Type of entry: Bibliographie
Title: Thin film phase diagram of iron nitrides grown by molecular beam epitaxy
Language: English
Date: 15 January 2017
Publisher: Elsevier Science Publishing
Journal or Publication Title: Journal of Magnetism and Magnetic Materials
Volume of the journal: 422
DOI: 10.1016/j.jmmm.2016.07.074
URL / URN: https://doi.org/10.1016/j.jmmm.2016.07.074
Abstract:

A low-temperature thin film phase diagram of the iron nitride system is established for the case of thin films grown by molecular beam epitaxy and nitrided by a nitrogen radical source. A fine-tuning of the nitridation conditions allows for growth of α′α′-Fe8Nx with increasing c/ac/a-ratio and magnetic anisotropy with increasing x until almost phase pure α′α′-Fe8N1 thin films are obtained. A further increase of nitrogen content below the phase decomposition temperature of α′α′-Fe8N (180 °C) leads to a mixture of several phases that is also affected by the choice of substrate material and symmetry. At higher temperatures (350 °C), phase pure γ′γ′-Fe4N is the most stable phase.

Uncontrolled Keywords: Iron Nitride, Molecular beam epitaxy, Thin films, Phase diagram, Nitrides, FeN
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Advanced Thin Film Technology
Date Deposited: 19 May 2017 09:06
Last Modified: 31 Jan 2019 07:51
PPN:
Funders: We thank the German federal state of Hessen through its excellence program LOEWE RESPONSE for financial support.
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