Next Article in Journal
Synthesis of Furan-Substituted N-Heteroacene-Based Liquid Material and Its Acid-Recognizing Behavior
Next Article in Special Issue
Growth of Catalyst-Free Hexagonal Pyramid-Like InN Nanocolumns on Nitrided Si(111) Substrates via Radio-Frequency Metal–Organic Molecular Beam Epitaxy
Previous Article in Journal
Investigation of Piezoelectric Ringing Frequency Response of Beta Barium Borate Crystals
Previous Article in Special Issue
Interfacial Mixing Analysis for Strained Layer Superlattices by Atom Probe Tomography
Article Menu
Issue 1 (January) cover image

Export Article

Open AccessArticle

Tuning the Size, Shape and Density of γ′-GayFe4−yN Nanocrystals Embedded in GaN

Institute for Semiconductor and Solid-State Physics, Johannes Kepler University Linz, Altenberger Str. 69, 4040 Linz, Austria
Author to whom correspondence should be addressed.
Current address: Institute Néel, CNRS, 25 rue des Martyrs BP 166, 38042 Grenoble, France.
Crystals 2019, 9(1), 50;
Received: 13 December 2018 / Revised: 11 January 2019 / Accepted: 13 January 2019 / Published: 17 January 2019
(This article belongs to the Special Issue MOVPE Growth of Crystalline Film)
PDF [1764 KB, uploaded 17 January 2019]


Phase-separated semiconductor systems hosting magnetic nanocrystal (NCs) are attracting increasing attention, due to their potential as spintronic elements for the next generation of devices. Owing to their morphology- and stoichiometry-dependent magnetic response, self-assembled γ ’-Ga y Fe 4 y N NCs embedded in a Fe δ -doped GaN matrix, are particularly versatile. It is studied and reported here, how the tuning of relevant growth parameters during the metalorganic vapour phase epitaxy process affects the crystalline arrangement, size, and shape of these self-assembled nanostructures. In particular, it is found that the Ga-flow provided during the δ -doping, determines the amount of Fe incorporated into the layers and the spatial density of the NCs. Moreover, the in-plane dimensions of the NCs can also be controlled via the Ga-flow, conditioning the aspect-ratio of the embedded nanostructures. These findings are pivotal for the design of nanocrystal arrays with on-demand size and shape, essential requirements for the implementation into functional devices. View Full-Text
Keywords: magnetic nanocrystals; Metal-organic vapor phase epitaxy; III-nitrides magnetic nanocrystals; Metal-organic vapor phase epitaxy; III-nitrides

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).

Share & Cite This Article

MDPI and ACS Style

Navarro-Quezada, A.; Devillers, T.; Li, T.; Bonanni, A. Tuning the Size, Shape and Density of γ′-GayFe4−yN Nanocrystals Embedded in GaN. Crystals 2019, 9, 50.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Crystals EISSN 2073-4352 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top