Authors: Gupta, A.; Narayan, J.; Kumar, Dhananjay

Source: Journal of Nanoscience and Nanotechnology, Volume 9, Number 6, June 2009 , pp. 3993-3996(4)

Publisher: American Scientific Publishers

Abstract:

A pulsed laser deposition technique has been used to synthesize a uniform distribution of Ni nanoparticles of controllable size in Al₂O₃ thin film matrix. The ability to control particle size in confined layers provides a very convenient means to tune the magnetic properties from superparamagnetic to ferromagnetic. The coercivity of these particles was measured at various temperatures as a function of particle size. The results indicate that the magnetic transition from single- to multi-domain region occurs at a larger particle size at higher temperature than at lower temperature. Stronger magnetic interaction among particles at lower temperatures is believed to lead to the formation of smaller sized domains for any given particle size in order to minimize the interaction energy.

Keywords: SELF-ASSEMBLY; NANOMAGNETISM; PULSED LASER DEPOSITION; SINGLE AND MULTI DOMAIN NANOPARTICLES

Document Type: Short communication

DOI: http://dx.doi.org/10.1166/jnn.2009.214

Publication date: 2009-06-01

More about this publication?

• Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
• Editorial Board
• Information for Authors
• Subscribe to this Title
• Terms & Conditions
• ingentaconnect is not responsible for the content or availability of external websites

Related content

• In this: publication
• By this: publisher
• In this Subject: Technology
• By this author: Gupta, A. ;  Narayan, J. ;  Kumar, Dhananjay

Website © Publishing Technology. Article copyright remains with the publisher, society or author(s) as specified within the article.

• Terms and conditions
• Privacy policy
• Information for advertisers