On the Ferrimagnetism of Iron Selenides

Investigation on solid solubility and magnetism of the non-stoichiometric compound Fe3Se4

“…The magnetic properties of iron selenides can be very sensitive to their compositions. The magnetism of iron selenides was first studied by Hirone and Chiba (1954), who reported that the Curie temperature of Fe 3 Se 4 is 303 K. Terzieff and Komamk (1978) also measured the magnetic properties of the compounds in the Fe–Se system and found that Fe 3 Se 4 is ferrimagnetic with a different Curie temperature of 338 K. The disagreement between the results obtained by Hirone and Chiba (1954) and Terzieff and Komamk (1978) can be due to different compositions they measured in the solid-solution range.…”

Nematic properties of FeSe$_{1-x}$Te$_{x}$ crystals with a low Te content

“…The crystals with hexagonal and tetragonal symmetries are different by their magnetic properties. While the hexagonal phase is magnetic, [31,32,33], in the tetragonal crystals iron is nonmagnetic. The corresponding tetragonal phase is a Pauli paramagnet with a low and weakly dependent on temperature susceptibility.…”

Magnetic Phases in Natural Pyrrhotite Fe0.89S and Fe0.91S

“…and Another approach in estimating the relative abundance of the phases is to consider the magnetization acquired by the specimens in strong magnetic fields prior to heating and to assume that this magnetization is due only to phase I. The magnetization acquired by Fe 0.875S in strong fields is about 17 emu/gr (Lotgering, 1956;Nagata, 1967) and that for …”

“…virtually isothermal ordering of the vacant cation sites onto one of the magnetic sublattices in the ferrimagnetic structure (Hirone et al, 1951;Bertaut, 1953;Benoit, 1955;Lotgering, 1956;Schwarz, 1967). Moreover, it was observed that the shape of the heating curves depends strongly on the thermal history for specimens of natural pyrrhotite with a cation points of inflection just below the Curie point.…”