Preprint Article Version 1 This version is not peer-reviewed

Structural, Magnetic and Mössbauer Studies of Ga and Zr Doped Dy2Fe17-XZrX and Dy2Fe16Ga1-xZrx (x=0.00, 0.25, 0.50, 0.75, 1.00)

Version 1 : Received: 15 July 2019 / Approved: 17 July 2019 / Online: 17 July 2019 (11:14:08 CEST)

How to cite: Dahal, J.N.; Ali, K.S.S. Structural, Magnetic and Mössbauer Studies of Ga and Zr Doped Dy2Fe17-XZrX and Dy2Fe16Ga1-xZrx (x=0.00, 0.25, 0.50, 0.75, 1.00). Preprints 2019, 2019070206 (doi: 10.20944/preprints201907.0206.v1). Dahal, J.N.; Ali, K.S.S. Structural, Magnetic and Mössbauer Studies of Ga and Zr Doped Dy2Fe17-XZrX and Dy2Fe16Ga1-xZrx (x=0.00, 0.25, 0.50, 0.75, 1.00). Preprints 2019, 2019070206 (doi: 10.20944/preprints201907.0206.v1).

Abstract

In this article, the effect of substitution of Zr and Ga in Dy2Fe17 prepared by arc melting technique are studied. The substitution of Zr and Ga in Dy2Fe17 was found to have an important effect on their structure and magnetic properties. The Rietveld analysis conformed that the crystalline system wereTh2Ni17 structure. Lattice parameters a (Å) and c (Å), unit cell volume (Å3), bonding distance (Å) were calculated by using Rietveld analysis. The unit cell volume of Dy2Fe17-xZrx and Dy2Fe16Ga1-xZrx increase linearly with the Zr and Ga substitution. The substitution of Zr and Ga are limited up to x=1 in order to avoid the decrease in saturation magnetization. The Curie temperature (Tc) of Dy2Fe17-xZrx and Dy2Fe16Ga1-xZrx are found to be Zr content dependent. The Curie temperature is found to be increasing first and then decrease for higher Zr content. The maximum curie temperature was observed 510K at x = 0.75 for Dy2Fe17-xZrx and 505.1 K at x = 0.5 for Dy2Fe17-xZrx which are102 K and 97 K higher than Dy2Fe17. The room temperature Mössbauer analysis shows the decrease in average hyperfine field and increase in isomer shift with Zr doping.

Subject Areas

permanent magnetic materials; 2:17 intermetallic; X-ray diffraction; rietveld analysis; Mössbauer Spectroscopy; curie temperature; soft magnet; doping

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