First-order reversal curve (FORC) diagrams of magnetic mixtures: Micromagnetic models and measurements
Carvallo, C., Muxworthy, A.R. and Dunlop, D.J. (2006) First-order reversal curve (FORC) diagrams of magnetic mixtures: Micromagnetic models and measurements. Physics of the Earth and Planetary Interiors, 154, (3-4), 306-322. (doi:10.1016/j.pepi.2005.06.017).
Download
Full text not available from this repository.
Description/Abstract
First-order reversal curve (FORC) diagrams were modelled and experimentally measured for different assemblages of single-domain (SD) magnetite particles with bimodal distributions of coercivities, and varying concentrations. When fitting end-member FORC diagrams to the FORC diagrams of mixtures, linear additivity is obeyed for the non-interacting mixtures, with predicted mixing ratios within the errorbars of the actual mixing ratios. Interacting mixtures are not always linearly additive. Experimental bimodal mixtures of magnetite particles (SD + pseudo-single-domain, PSD) have FORC diagrams that are usually linearly additive, regardless of the magnetite concentration of the sample (10 or 1%). Measured FORC diagrams of mixtures of SD magnetite and SD hematite again show that linear additivity of the two end-members holds. However, the very small Ms of hematite compared to that of magnetite makes it difficult to detect a contribution on a FORC diagram from hematite, unless it comprises at least 88% of the mixture.
| Item Type: | Article |
|---|---|
| ISSNs: | 0031-9201 (print) |
| Related URLs: | |
| Keywords: | FORC diagram; interactions; micromagnetic model; magnetic mixtures; SD magnetite |
| Subjects: | Q Science > QE Geology |
| Divisions: | University Structure - Pre August 2011 > School of Ocean & Earth Science (SOC/SOES) |
| Item ID: | 44704 |
| Date Deposited: | 08 Mar 2007 |
| Last Modified: | 01 Jun 2011 02:24 |
| Contributors: | Carvallo, C. (Author) Muxworthy, A.R. (Author) Dunlop, D.J. (Author) |
| Date: | 2006 |
| Status: | Published |
| URI: | http://eprints.soton.ac.uk/id/eprint/44704 |
Actions (login required)
 |
View Item |
