Micromagnetic constraints on the grain size dependence and magnetic stability of sub-micron monoclinic pyrrhotite (Fe7S8) - Williams,W; Muxworthy,AR; Donardelli,Bellon U; Nagy,L; Cowan,AA; Valdez-Grijalva,AP; Roberts,AP (Journal of Geophysical Research (JGR): Solid Earth, 2026)