Examination of synthetic ilmenite-hematite samples by transmission electron microscopy has for the first time revealed the presence of well-defined antiphase domains and antiphase domain boundaries in this mineral system. Samples quenched from 1300??C have a high density of domain boundaries, whereas samples quenched from 900??C have a much lower density. Only the high-temperature samples acquire reverse thermoremanent magnetism when cooled in an applied magnetic field. The presence of a high density of domain boundaries seems to be a necessary condition for the acquisition of reverse thermoremanent magnetism.
|Title||Antiphase domains and reverse thermoremanent magnetism in ilmenite-hematite minerals|
|Authors||C.A. Lawson, G.L. Nord, Eric Dowty, R.B. Hargraves|
|Publication Subtype||Journal Article|
|Record Source||USGS Publications Warehouse|