More than 400 years ago William Gilbert said, ÒThe Earth itself is a great magnet. Ó Today,
we know that it is also a great magnetic tape recorder. This work is a comprehensive, up-to …

The palaeomagnetic signal of rocks arises mainly due to the presence of Fe-bearing oxide
solid solutions with the spinel crystal structure (such as the titanomagnetites). The ability of …

The geomagnetic field acts both as an umbrella, shielding us from cosmic radiation and as a
window, offering one of the few glimpses of the inner workings of the Earth. Ancient records …

We report the magnetic properties for dispersed, spherical Fe3O4 and γ-Fe2O3 particles∼
250 nm in diameter in the temperature range T= 4.2–294 K. For Fe3O4, hysteresis …

Magnetic hysteresis, 57Fe Mössbauer and X-ray data are presented for spherical 250nm
particles of solid solutions in the spinel system Fe3O4–γ-Fe2O3 (Fe3-u□ uO4, 0⩽ u⩽ 1/3 …

The ferrimagnetic mineral greigite (cubic Fe3S4) is well known as an intracellular
biomineralization product in magnetic bacteria and as a widely occurring authigenic mineral …

A one‐dimensional micromagnetic model is used to calculate the thermal dependence of
microcoercivity (hc) produced by the unpinning of a domain wall (DW) from various types of …

The minerals carrying the magnetic remanence in geological samples are commonly a solid
solution series of iron‐titanium spinels known as titanomagnetites. Despite the range of …

We extend the thermoremanent magnetization (TRM) and pTRM theories developed in
paper 1 (Dunlop and Xu, this issue) to grains in which domain walls are pinned by …

It is usually assumed that magnetic parameters such as coercivity and saturation remanence
are single‐domain (SD) over the same size range. In reality, there is a different SD size …