Production and characterization of compacted Fe16N2 permanent magnets

Akdoğan, Nilay Gündüz; Zırhlı, Onur; Gerin, M.; Floch, Sylvie Le; Roy, Damien Le; Akdoğan, Ozan

doi:10.1016/j.actamat.2022.118064

Cited by 6 publications

(1 citation statement)

References 31 publications

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“…Both energy product and H c also depend on saturation magnetization (M s ) and uniaxial magnetic anisotropy (K u ). So, it is highly desirable to fabricate a material that has large M S and K u to exhibit sufficient PM performance [6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Ultra-thin 2D Fe₃GaTe₂ rare-earth free permanent magnet at finite temperatures

Marfoua,

Khan,

Hong

2023

J. Phys. D: Appl. Phys.

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Despite extensive studies on permanent magnets in bulk-type materials, the possibility of permanent magnets in two-dimensional materials is barely explored so far. In this work, we investigate temperature dependent magnetic properties of atomically thin (2~3 nm thickness) two-dimensional (2D) Fe3GaTe2. We obtain that both trilayer and four-layer thicknesses structures have TC of 340 K ~352 K. Both systems have perpendicular magnetic anisotropy, and the uniaxial anisotropy constant is monotonically decreased with increasing temperature. At 300 K, the 2D Fe3GaTe2 has a coercive field of 0.34 T at 2 nm thickness, and it becomes 0.44 T at 3 nm thickness. Besides, both systems have a magnetic hardness parameter larger than 1 even at 300 K. We also obtain a maximum energy product (BH)max of 24 kJ/m3 at 2 nm thickness, and it is further increased to 26 kJ/m3 at 3 nm thickness at 300 K. Nonetheless, these (BH)max are decreased by more than 2 times with including the demagnetization factor. Overall, we obtain that 2D Fe3GaTe2 at 2~3 nm thickness possesses the same scale of coercive field and maximum energy product of wellknown bulk ferrite PM. Our finding may indicate that the atomically thin 2D system can be a potential rare-earth-free PM for small-scale device applications.

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