Effect of Pressure on the Ferrimagnetic Curie Temperature of Fe3□ Se4

Ozawa, K.; Yoshimi, T.; Anzai, S.; Yanagisawa, Saburô

doi:10.1002/pssa.2210190151

Cited by 9 publications

(2 citation statements)

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“…Fe 3 Se 4 is a rare-earth free ferrimagnet with an ordering temperature ( T C ) of 332 K and a relatively high energy product of 4.37 kG Oe at 300 K . It belongs to the Cr 3 S 4 structure type, which can be described as a variant of the NiAs-type structure that lacks 50% of metal sites in every other layer parallel to the bc plane of the monoclinic lattice (space group C 2/ m ) .…”

Section: Introductionmentioning

confidence: 99%

“…Fe 3 Se 4 is a rare-earth free ferrimagnet with an ordering temperature (T C ) of 332 K 17 and a relatively high energy product of 4.37 kG Oe at 300 K. 18 It belongs to the Cr 3 S 4 structure type, which can be described as a variant of the NiAstype structure that lacks 50% of metal sites in every other layer parallel to the bc plane of the monoclinic lattice (space group C2/m). 19 These vacancy-containing layers host Fe 2+ ions and alternate, along the a-axis, with vacancy-free layers that contain Fe 3+ ions, with each Fe site being octahedrally coordinated by Se 2− ions (Figure 1a).…”

Section: ■ Introductionmentioning

confidence: 99%

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Increasing Magnetic Hardness of Fe₃Se₄ via Cu Doping

et al. 2021

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The influence of Cu doping on the structural and magnetic properties of the Fe3Se4 ferrimagnet has been investigated by a combination of X-ray diffraction, Raman spectroscopy, X-ray absorption spectroscopy, and magnetic measurements. While the effects of dopants with ionic radii closer to those of the Fe sites in Fe3Se4 had been studied before, Cu is a less conventional dopant, due to its smaller size (at the same ionic charge) and preference for lower coordination numbers. A (Fe1–x Cu x )3Se4 series, where x = 0–0.15, has been prepared by either high-temperature annealing or the solvothermal method. Although only a limited amount of Cu enters the Fe3Se4 structure, the Cu doping causes a substantial increase in the coercivity of the material. Furthermore, the samples prepared by the solvothermal method exhibit much larger coercive fields as compared to those observed for the samples prepared by high-temperature annealing. The effect was traced to the higher lattice strain accumulated in the samples synthesized solvothermally, as evidenced by the broadening of their Raman peaks.

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%