Thakur, M and Chowdhury, M. Pal and Majumdar, S and Giri, S (2008) Dominant dipolar interaction and glassy magnetic behaviour in polymer-coated magnetite nanoparticles. NANOTECHNOLOGY, 19 (4).
Full text is not hosted in this archive but may be available via the Official URL, or by requesting a copy from the corresponding author.
Official URL: http://www.iop.org/EJ/abstract/0957-4484/19/4/0457...
The static and dynamic properties of magnetization have been investigated for polymer-coated magnetite nanoparticles with sizes from 5 to 15 nm. The analysis of the temperature dependence of zero-field-cooled magnetization indicates that the effective anisotropy constant is found to increase with the decrease of particle size, which is ascribed to the increase of surface anisotropy. The relaxation of the remanent magnetization clearly shows the signature of dominant dipolar interparticle interaction. The dynamics of magnetization also indicates the signature of glassy magnetic behaviour. The memory effect in the temperature dependence of field-cooled magnetization is noticed, which is inconsistent with the glassy magnetic behaviour.
|Subjects:||Physical Science > Nanophysics|
Physical Science > Nano objects
Physical Science > Nanomagnetics
|Deposited By:||Anuj Seth|
|Deposited On:||15 Dec 2008 12:53|
|Last Modified:||02 Mar 2009 16:04|
Repository Staff Only: item control page