University of Surrey

Test tubes in the lab Research in the ATI Dance Research

Effect of Gd Implantation on the Structural and Magnetic Properties of GaN and AlN

Han, S Y, Hite, J, Thaler, G T, Frazier, R M, Abernathy, C R, Pearton, S J, Choi, H K, Lee, W O, Park, Y D, Zavada, J M and Gwilliam, R (2006) Effect of Gd Implantation on the Structural and Magnetic Properties of GaN and AlN Applied Physics Letters, 88 (4). ISSN 00036951

[img]
Preview
PDF
fulltext.pdf

Download (153Kb)

Abstract

Gd+ ions were implanted at total doses of 3-6x10(14) cm(2) into single-crystal GaN or AlN epilayers grown on sapphire substrates and annealed at 700-1000 degrees C. The implanted Gd showed no detectable diffusion in either material after annealing, as measured by secondary ion mass spectrometry, corresponding to a diffusion coefficient < 8x10(-12) cm(2) s(-1). Under all annealing conditions, x-ray diffraction shows the formation of second phases. In the case of GaN, these include Gd3Ga2, GdN, and Gd, while for AlN only Gd peaks are observed. Both the GaN and AlN show high saturation magnetization after annealing at 900 degrees C (similar to 15 emu cm(-3) for GaN and similar to 35 emu cm(-3) for AlN). The magnetization versus temperature characteristics of the Gd-implanted GaN show a blocking behavior consistent with the presence of precipitates, whereas the AlN shows a clear difference in field-cooled and zero-field-cooled magnetization to above room temperature which may also be due to Gd inclusions. (c) 2006 American Institute of Physics

Item Type: Article
Additional Information: Published in <i>Applied Physics Letters,</i> Vol. 88, Iss. 4. Copyright 2006 American Institute of Physics. Click <a href=http://apl.aip.org/>here</a> to access the journal's webpage.
Divisions: Faculty of Engineering and Physical Sciences > Electronic Engineering > Advanced Technology Institute > Ion Beam Centre
Depositing User: Mr Adam Field
Date Deposited: 27 May 2010 14:06
Last Modified: 23 Sep 2013 18:25
URI: http://epubs.surrey.ac.uk/id/eprint/96

Actions (login required)

View Item View Item

Downloads

Downloads per month over past year


Information about this web site

© The University of Surrey, Guildford, Surrey, GU2 7XH, United Kingdom.
+44 (0)1483 300800