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Open AccessArticle

Effect of Ga and Zr Substitution on the Properties of Dy2Fe17−XZrX and Dy2Fe16Ga1−xZrx (0 ≤ x ≤ 1) Intermetallic Compounds Prepared via Arc Melting Process

1
Department of Physics and Astronomy, Truman State University, Kirksville, MO 63501, USA
2
Department of Physics and Materials Science, University of Memphis, Memphis, TN 38152, USA
3
Department of Science, Harmony Science Academy, 12005 Forestgate Dr., Dallas, TX 75243, USA
*
Author to whom correspondence should be addressed.
Magnetochemistry 2020, 6(1), 9; https://doi.org/10.3390/magnetochemistry6010009
Received: 5 December 2019 / Revised: 7 February 2020 / Accepted: 17 February 2020 / Published: 21 February 2020
(This article belongs to the Special Issue Permanent Magnets)
The effects of substitution of Zr and Ga on the structural and magnetic properties of Dy2Fe17 intermetallic compound were investigated in this study. The Rietveld analysis confirmed that the crystalline system was a Th2Ni17 structure. Lattice parameters a (Å) and c (Å), unit cell volume (Å3), and bonding distance (Å) were calculated using Rietveld analysis. The unit cell volume of Dy2Fe17−xZrx and Dy2Fe16Ga1−xZrx increased linearly with Zr and Ga substitution. The Curie temperature (Tc) of Dy2Fe17−xZrx and Dy2Fe16Ga1−xZrx was found to be Zr content-dependent. The maximum Curie temperatures were observed at 510 K (x = 0.75 Zr content) for Dy2Fe17−xZrx and 505.1 K (x = 0.5 Zr content) for Dy2Fe16Ga1−xZrx, which are 102 K and 97 K higher than the value found for Dy2Fe17, respectively. The room-temperature Mössbauer analysis showed a decrease in the average hyperfine field and increases in the isomer shift with Zr doping. The overall improvement in Curie temperature with the substitution strategy of Zr–Ga substitution in 2:17 intermetallic compounds could find potential use of these magnetic compounds in high-temperature applications. View Full-Text
Keywords: permanent magnetic materials; 2:17 intermetallic; X-ray diffraction; Rietveld analysis; Mössbauer spectroscopy; Curie temperature; soft magnet; doping permanent magnetic materials; 2:17 intermetallic; X-ray diffraction; Rietveld analysis; Mössbauer spectroscopy; Curie temperature; soft magnet; doping
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Dahal, J.N.; Ali, K.S.; Mishra, S.; Neupane, D. Effect of Ga and Zr Substitution on the Properties of Dy2Fe17−XZrX and Dy2Fe16Ga1−xZrx (0 ≤ x ≤ 1) Intermetallic Compounds Prepared via Arc Melting Process. Magnetochemistry 2020, 6, 9.

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