Gajbhiye, N. S. and Bhattacharyya, Sayan and Shivaprasad, S. M. (2008) Synthesis and characterization of epsilon-Fe3N/GaN, 54/46-composite nanowires. Materials Research Bulletin, 43 (2). pp. 272-283. ISSN 0025-5408

PDF - Published Version Restricted to Registered users only Download (633Kb) | Request a copy

Abstract

epsilon-Fe3N/GaN, 54/46-composite nanowires (aspect ratio: 40), with core-shell structure, are synthesized by wet chemical method. Structural and morphological investigations are performed using X-ray diffraction (XRD)-Rietveld analysis and microscopy techniques. The encapsulation of epsilon-Fe3N by GaN is probed by X-ray photoelectron spectroscopy (XPS). The in-depth profile analysis probes the large interface region consisting both the phases. Although the respective surface oxynitride phases are present, the nitride phases are dominant inside the nanowires. The interface region of the nanowires influences the low temperature magnetic behavior. The superparamagnetic and ferromagnetic fractions coexist even at 5 K, due to the nanowire size distribution. Spin-glasslike collective ordering is observed below 50 K due to the freezing of the localized frustrated spins. Room temperature photoluminescence (PL) reveals the presence of surface states in the GaN shell.

Item Type:	Article
Additional Information:	Copyright for this article belongs to M/s Elsevier.
Subjects:	Materials Science
Divisions:	UNSPECIFIED
Depositing User:	Ms Neetu Chandra
Date Deposited:	19 Apr 2017 08:44
Last Modified:	19 Apr 2017 08:44
URI:	http://npl.csircentral.net/id/eprint/2126

Actions (login required)

View Item