EconPapers    
Economics at your fingertips  
 

Ordered systems of ultrafine ferromagnetic particles

M. Porto ()

The European Physical Journal B: Condensed Matter and Complex Systems, 2005, vol. 45, issue 3, 369-375

Abstract: A simple model for systems of dipolarly interacting single-domain ultrafine ferromagnetic particles is studied by Monte Carlo simulations. Zero field cooling and field cooling as well as relaxation experiments are used to compare systems with positional and orientational disorder to systems which are (i) positionally, (ii) orientationally, and (iii) positionally and orientationally ordered. It is shown that, as far as macroscopic observables are concerned, these partially [cases (i) and (ii)] or fully [case (iii)] ordered systems, despite quantitative differences, behave qualitatively very similar to the disordered one. This holds true even for the relaxation, where the decay of the magnetization M(t)/M S (measured in units of the saturation magnetization M S ) leads to an instantaneous relaxation rate W(t)=-d/dt ln [ M(t)/M S ] vanishing as a power-law as a function of time t, W(t) ∝t -n . The exponent n is found to increase with increasing concentration, and becomes n > 1 for dense systems. Copyright EDP Sciences/Società Italiana di Fisica/Springer-Verlag 2005

Date: 2005
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
http://hdl.handle.net/10.1140/epjb/e2005-00186-3 (text/html)
Access to full text is restricted to subscribers.

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:spr:eurphb:v:45:y:2005:i:3:p:369-375

Ordering information: This journal article can be ordered from
http://www.springer.com/economics/journal/10051

DOI: 10.1140/epjb/e2005-00186-3

Access Statistics for this article

The European Physical Journal B: Condensed Matter and Complex Systems is currently edited by P. Hänggi and Angel Rubio

More articles in The European Physical Journal B: Condensed Matter and Complex Systems from Springer, EDP Sciences
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().

 
Page updated 2025-03-20
Handle: RePEc:spr:eurphb:v:45:y:2005:i:3:p:369-375