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

卷:6

JibaNath Dahal¹  S.R. Mishra²  Dipesh Neupane²  K.S.Syed Ali³ 

[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;

关键词: permanent magnetic materials;    2:17 intermetallic;    x-ray diffraction;    rietveld analysis;    mössbauer spectroscopy;    curie temperature;    soft magnet;    doping;   

DOI  :  10.3390/magnetochemistry6010009

来源: DOAJ

【 摘 要 】

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 (ų), and bonding distance (Å) were calculated using Rietveld analysis. The unit cell volume of Dy₂Fe_17−xZr_x and Dy₂Fe₁₆Ga_1−xZr_x increased linearly with Zr and Ga substitution. The Curie temperature (Tc) of Dy₂Fe_17−xZr_x and Dy₂Fe₁₆Ga_1−xZr_x was found to be Zr content-dependent. The maximum Curie temperatures were observed at 510 K (x = 0.75 Zr content) for Dy₂Fe_17−xZr_x and 505.1 K (x = 0.5 Zr content) for Dy₂Fe₁₆Ga_1−xZr_x, 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.

【 授权许可】

Unknown