CUED Publications database

Experimental observation of ferromagnetism evolution in nanostructured semiconductor InN

Song, B and Zhu, K and Liu, J and Jian, J and Han, J and Bao, H and Li, H and Liu, Y and Zuo, H and Wang, W and Wang, G and Zhang, X and Meng, S and Wang, W and Chen, X (2010) Experimental observation of ferromagnetism evolution in nanostructured semiconductor InN. Journal of Materials Chemistry, 20. pp. 9935-9940. ISSN 0959-9428

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Abstract

Recently, undoped semiconductors have been pushed to the frontiers of diluted magnetic semiconductors (DMSs) since no spurious ferromagnetism (FM) signal from metal segregation occurs. However, some aspects still remain untouched in undoped semiconductors nanostructures, including: 1) the evolution of spin moments during the fabrication process; 2) possible intrinsic relationship between the magnetic properties and morphological features, the latter being also dependent on formation process. In this article, we synthesized undoped InN nanostructures and observed a gradual magnetic transition from diamagnetic to FM, and an obvious morphology evolution from tube-shape to wire-shape products with the increase of nitridation time. It is speculated that increasing surface defects such as N vacancies in the morphology transition process are the intrinsic causes for the enhanced FM order with increase of nitridation time. The results provide some useful clues in understanding the true magnetic origin in nanostructured DMSs and reported properties inconsistencies in nanostructured materials. © 2010 The Royal Society of Chemistry.

Item Type: Article
Subjects: UNSPECIFIED
Divisions: Div B > Solid State Electronics and Nanoscale Science
Depositing User: Cron Job
Date Deposited: 12 May 2018 20:06
Last Modified: 10 Apr 2021 01:06
DOI: 10.1039/c0jm02083d