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Intrinsic magnetic properties of Ce 2 (Fe, Co) 14 B and its modifications by Ni and Cu

Title:

Intrinsic magnetic properties of Ce 2 (Fe, Co) 14 B and its modifications by Ni and Cu

Medraj, Mamoun and Wang, Tian (2018) Intrinsic magnetic properties of Ce 2 (Fe, Co) 14 B and its modifications by Ni and Cu. Journal of Alloys and Compounds . ISSN 09258388 (In Press)

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Official URL: http://dx.doi.org/10.1016/j.jallcom.2018.06.017

Abstract

The intrinsic magnetic properties of Ce2Fe14-xCoxB (x ≤ 4.76) are studied at 25 °C using key alloys annealed at 900 °C for 25 days. The saturation magnetization (Ms) and the Curie temperature (Tc) of Ce2Fe14-xCoxB increase with Co content. However, the anisotropy field (Ha) of Ce2Fe14-xCoxB diminishes precipitously with Co content. The process of crystal structure refinemen indicates that the saturation magnetization of Ce2Fe14-xCoxB is related to the site occupancy of Co atoms at different Fe atomic sites. Co atoms prefer to occupy 8j2 site, followed by 16k2, 4e and 16k1 sites sequentially. Moreover, Co atoms occupying 8j2 site are more effective leading to an increase in the Ms. The individual effects of Ni or Cu on the intrinsic magnetic properties of Ce2Fe12.98-xCo1.02NixB and Ce2Fe12.98-yCo1.02CuyB are evaluated. The maximum solid solubilities of Ni and Cu in Ce2Fe12.98Co1.02B at 900 °C are found to be 8 at.% and 0.8 at.%, respectively. Ni or Cu enhances Tc, but decreases both Ms and Ha of Ce2Fe12.98Co1.02B. The paper also discussed the combined effects of Ni and Cu on the intrinsic magnetic properties of Ce2Fe12.98Co1.02B. The Ms of Ce2Fe12.98-x-yCo1.02NixCuyB (0 ≤ x ≤ 0.41, y ≈ 0.119) increases after doping with both Ni and Cu, reaching around 155 emu/g. Meanwhile, the Ha and the Tc are measured to be near 24 kOe and 280 °C, respectively.

Divisions:Concordia University > Gina Cody School of Engineering and Computer Science > Mechanical and Industrial Engineering
Item Type:Article
Refereed:Yes
Authors:Medraj, Mamoun and Wang, Tian
Journal or Publication:Journal of Alloys and Compounds
Date:2018
Funders:
  • Natural Sciences and Engineering Research Council of Canada (NSERC)
Digital Object Identifier (DOI):10.1016/j.jallcom.2018.06.017
Keywords:Permanent magnets; Magnetic measurement; Magnetic Ce2Fe14-xCoxB; Saturation magnetization; Anisotropy field; Curie temperature
ID Code:983937
Deposited By: ALINE SOREL
Deposited On:06 Jun 2018 18:02
Last Modified:06 Jun 2018 18:02

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