𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Role of surface disorder on the magnetic properties and hysteresis of nanoparticles

✍ Scribed by Òscar Iglesias; Amı́lcar Labarta

Publisher
Elsevier Science
Year
2004
Tongue
English
Weight
648 KB
Volume
343
Category
Article
ISSN
0921-4526

No coin nor oath required. For personal study only.

✦ Synopsis

We present the results of Monte Carlo simulations of a model of a single maghemite ferrimagnetic nanoparticle including radial surface anisotropy distinct from that in the core with the aim to clarify its role on the magnetization processes at low temperatures. The low-temperature equilibrium states are analysed and compared to those of a ferromagnetic particle with the same lattice structure. We have found that the formation of hedgehog-like structures due to increased surface anisotropy is responsible for a change in the reversal mechanism of the particles.

📜 SIMILAR VOLUMES

The role of cationic disorder on the mag
The role of cationic disorder on the magnetic properties of double perovskites
✍ L. Bufaiçal; L. Mendonça Ferreira; R. Lora-Serrano; P.G. Pagliuso; A. Caytuero; 📂 Article 📅 2009 🏛 Elsevier Science 🌐 English ⚖ 377 KB

We have synthesized polycrystalline samples of the series of double-perovskite (DP) type structure ðCa; SrÞ 2Àx La x FeIrO 6 . Their structural and magnetic properties were investigated by experiments of X-ray powder diffraction, magnetic susceptibility and electrical resistivity. Both series crysta

Predicting a major role of surface spins
Predicting a major role of surface spins in the magnetic properties of ferrite nanoparticles
✍ I. M. Obaidat; V. Mohite; B. Issa; N. Tit; Y. Haik 📂 Article 📅 2009 🏛 John Wiley and Sons 🌐 English ⚖ 152 KB

Room-temperature magnetization hysterisis measurements were conducted on Mn 0.5 Zn 0.5 Gd x Fe (2-x) O 4 ferrite nanoparticles, with x = 0, 0.5, 1.0, 1.5. The structure of this ferrite is normal spinel where the added of Gd 3+ ions occupied the octahedral sites and replaces Fe 3+ ions. The saturatio