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Effect of the Mn/Fe Ratio on the Microstructure and Magnetic Properties in the Powder Form (Fe1−x Mn x )2P System

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Abstract

The structure, morphology, and magnetic properties of the mechanically alloyed iron manganese phosphides (Fe1−x Mn x )2P with 0.15 ≤ x ≤ 0.75 (Mn/Fe ratio = 0.17, 0.33, 0.66, and 3) have been studied by means of X-ray diffraction, scanning electron microscopy coupled with energy-dispersive X-ray spectrometry, and BS1 and BS2 magnetometry. The powder form (Fe1−x Mn x )2P compounds exhibit multiphase structures that contain Fe(Mn)-type solid solution and Fe2P-type, Mn2P-type, Fe3P-type, and MnP/FeP-type phosphides. The magnetization versus temperature reveals the existence of multiple magnetic phase transitions. The saturation magnetization, coercivity, and squarness M r/M s ratio values are discussed as a function of both the Mn content and the temperature. From the approach to saturation magnetization studies, several fundamental magnetic parameters were extracted. The local magnetic anisotropy constant K 1 was determined.

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Acknowledgements

The financial support from the Hubert-Curien “Maghreb” partnership PHC-Maghreb 15 MAG07, the Ministère de l’Enseignement Supérieur et de la Recherche Scientifique Algérien, the Ministère de l’Enseignement Supérieur et de la Recherche Scientifique Marocain, and the Ministère des Affaires Etrangères et du Développement International français are gratefully acknowledged.

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Brahimi, A., Alleg, S., Yamkane, Z. et al. Effect of the Mn/Fe Ratio on the Microstructure and Magnetic Properties in the Powder Form (Fe1−x Mn x )2P System. J Supercond Nov Magn 30, 3045–3054 (2017). https://doi.org/10.1007/s10948-017-4151-0

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  • DOI: https://doi.org/10.1007/s10948-017-4151-0

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