Journal
Article title
Authors
Title variants
Languages of publication
Abstracts
In this work we present the study on structural and magnetic properties of fine cobalt nanoparticles coated by protective gold layer synthetized by microemulsion method. Structural measurements (powder XRD, HRTEM) confirmed spherical shape of the particles, their nanocrystalline character and presence of individual Co and Au phases. Investigation of magnetic properties of the particles revealed superparamagnetic behavior at higher temperatures and magnetic hysteresis at low temperatures. Average magnetic moment of individual particle m_{p}~86.3μ_{B} was established. The critical temperature, below which the magnetic moments of the particles are blocked, was T_{B}=6 K. Investigation of magnetic relaxation processes via magnetic susceptibility, detected one maximum attributed to single relaxation process, present in the particles. Obtained data, interpreted in terms of Neél-Arrhenius and Vogel-Fulcher theoretical models, confirmed the presence of strong magnetic interparticle interactions.
Discipline
Journal
Year
Volume
Issue
Pages
216-217
Physical description
Dates
published
2014-07
Contributors
author
- Institute of Physics, Faculty of Sciences, P.J. Šafárik University, Park Angelinum 9, 041 54 Košice, Slovakia
author
- Institute of Physics, Faculty of Sciences, P.J. Šafárik University, Park Angelinum 9, 041 54 Košice, Slovakia
author
- Department of Inorganic Chemistry, Faculty of Sciences, P.J. Šafárik University Moyzesova 11, 040 01 Košice, Slovakia
author
- Institute of Experimental Physics, Slovak Academy of Sciences, Watsonova 47, 040 01 Kosice, Slovakia
References
- [1] C. Sun, J.S.H. Lee, M. Zhang, Advanced Drug Delivery Reviews 60, 1252 (2008), doi: 10.1016/j.addr.2008.03.018
- [2] S. Mørup, M.F. Hansen, C. Frandsen, Beilstein J. Nanotechnol 1, 182 (2010), doi: 10.3762/bjnano.1.22
- [3] C. Vázquez-Vázquez, M.A. López-Quintela, M.C. Buján-Núňez, J. Rivas, J. Nanopart. Res. 13, 1663 (2010)
- [4] M. Tadić, D. Marković, V. Spasojević, V. Kusigerski, M. Remškar, J. Pirnat, Z. Jagličić, J. All. Comp. 441, 291 (2007), doi: 10.1016/j.jallcom.2006.09.099
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv126n1103kz