Anisotropy-induced spin disorder in intergrown, ferrimagnetic Fe₇S₈ polytypes

The monosulfides of the pyrrhotite omission series ([Formula: see text]) are important remanence carriers for paleomagnetic reconstruction Earth's crust and extraterrestrial materials. ferrimagnetic [Formula: text] polytypes endmembers, their stacking modulations full vacant layers generate different magnetic anisotropy properties due to cation-vacancy configurations. In this study, intergrown long-range ordered with four- threefold modulation, i.e., 4C 3C pyrrhotite, were prepared in a diffusion-driven process by quenching natural crystal randomized vacancies. addition, third constituent coherence lengths few nanometers, denoted * , was found that exhibits spin-glass behavior at about 10 K local anisotropies arising from vacancy-density variations. concomitant occurrence nano-scale spin disorder indicate competitive processes during formation. Such information provides insight into provenance genesis Earth systems broader sense vacancy-induced