Interpreting remanence isotherms: a Preisach-based study

R. Roshko () and C. Viddal

The European Physical Journal B: Condensed Matter and Complex Systems, 2004, vol. 40, issue 2, 145-151

Abstract: Numerical simulations of the field dependence of the isothermal remanent moment (IRM) and the thermoremanent moment (TRM) are presented, based on a Preisach formalism which decomposes the free energy landscape into an ensemble of thermally activated, temperature dependent, double well subsystems, each characterized by a dissipation field H d and a bias field H s . The simulations show that the TRM approaches saturation much more rapidly than the corresponding IRM and that, as a consequence, the characteristics of the IRM are determined primarily by the distribution of dissipation fields, as defined by the mean field $\bar {H}_d (T)$ and the dispersion $\sigma_d (T)$ , while the characteristics of the TRM are determined primarily by a mixture of the mean dissipation field $\bar {H}_d (T)$ and the dispersion of bias fields $\sigma_s (T)$ . The simulations also identify a regime $\bar {H}_d \gg\sigma_s $ , where the influence of $\bar {H}_d (T)$ on the TRM is negligible, and hence where the TRM and the IRM provide essentially independent scans of the Preisach distribution along the two orthogonal H s and H d directions, respectively. The systematics established by the model simulations are exploited to analyze TRM and IRM data from a mixed ferromagnetic perovskite Ca 0.4 Sr 0.6 RuO 3 , and to reconstruct the distribution of characteristic fields H d and H s , and its variation with temperature. Copyright Springer-Verlag Berlin/Heidelberg 2004

Date: 2004
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
http://hdl.handle.net/10.1140/epjb/e2004-00253-3 (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:40:y:2004:i:2:p:145-151

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

DOI: 10.1140/epjb/e2004-00253-3

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 ().