NDLI: Superparamagnetic behavior of antiferromagnetic CuO nanoparticles

Content Provider	IEEE Xplore Digital Library
Author	Rao, G.N. Yao, Y.D. Chen, J.W.
Copyright Year	1965
Abstract	We report on the magnetic properties of CuO nanoparticles prepared by the sol-gel method. M (T) curves show a blocking temperature at T/sub B/=135 K and 160 K for 13 nm and 17 nm size particles, respectively, in measuring field H=100 Oe. The M-H data for both the samples show a reversal magnetization at 300 K, whereas below T/sub B/ it exhibit symmetrical hysteresis loops with a coercive field of 200 Oe (155 Oe) and a remanence 0.306 emu/mole (0.171 emu/mole) for 13 nm (17 nm) at 5 K. Presence of superparamagnetism and net magnetic moments of CuO nanoparticles are attributed to the uncompensated Cu/sup 2+/ions at the surface of the particles.
Sponsorship	IEEE Magnetics Society
Starting Page	3409
Ending Page	3411
Page Count	3
File Size	629156
File Format	PDF
ISSN	00189464
Volume Number	41
Issue Number	10
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2005-10-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Antiferromagnetic materials Nanoparticles Magnetic properties Temperature Magnetic field measurement Particle measurements Size measurement Magnetization Magnetic hysteresis Remanence superparamagnetism Antiferromagnetism blocking temperature CuO nanoparticles
Content Type	Text
Resource Type	Article
Subject	Electronic, Optical and Magnetic Materials Electrical and Electronic Engineering

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