Synthesis and magnetic properties of cobalt ferrite (CoFe2O4) nanoparticles prepared by wet chemical route

MAAZ, K.; MUMTAZ, Arif; Hasanain, S.; Ceylan, ABDULLAH

doi:10.1016/j.jmmm.2006.06.003

Synthesis and magnetic properties of cobalt ferrite (CoFe2O4) nanoparticles prepared by wet chemical route

Atıf İçin Kopyala

MAAZ K., MUMTAZ A., Hasanain S. K., Ceylan A.

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, cilt.308, sa.2, ss.289-295, 2007 (SCI-Expanded)

Yayın Türü: Makale / Tam Makale
Cilt numarası: 308 Sayı: 2
Basım Tarihi: 2007
Doi Numarası: 10.1016/j.jmmm.2006.06.003
Dergi Adı: JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS
Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
Sayfa Sayıları: ss.289-295
Hacettepe Üniversitesi Adresli: Hayır

Özet

Magnetic nanoparticles of cobalt ferrite have been synthesized by wet chemical method using stable ferric and cobalt salts with oleic acid as the surfactant. X-ray Diffraction (XRD) and Transmission Electron Microscope (TEM) confirmed the formation of single-phase cobalt ferrite nanoparticles in the range 15-48 urn depending on the annealing temperature and time. The size of the particles increases with annealing temperature and time while the coercivity goes through a maximum, peaking at around 28 run. A very large coercivity (10.5 kOe) is observed on cooling down to 77 K while typical blocking effects are observed below about 260 K. The high field moment is (c) 2006 Elsevier B.V. All rights reserved.