<span style="font-size:12.0pt;line-height: 115%;font-family:"Times New Roman","serif";mso-fareast-font-family:"Times New Roman"; mso-ansi-language:EN-IN;mso-fareast-language:EN-IN;mso-bidi-language:HI" lang="EN-IN">Effect of Fe³⁺ substitution on structural and macro-magnetic properties of yttrium iron garnet</span>

Abstract

The structural and bulk magnetic properties of Fe³⁺ substituted yttrium iron garnet with general formulaY_3-xFe_5+xO₁₂ (<i>x </i>= 0.0, 0.05, 0.15,0.30 and 0.50) have been investigated by means of X-ray diffraction, EDAX, high field magnetization and low field a.c. susceptibility measurements. It is found that substituted Fe³⁺ ions occupy <i>c</i>-sites and increase in lattice

constant for <i>x&gt; </i>0.30 is due to presence of Fe²⁺ ions, determined through EDAX, on <i>a</i>-sites. Variation of magneton number with <i>x </i>can be explained satisfactorily assuming the collinear spin ordering model and Neel temperature values deduced experimentally from a.c. suscepti bility measurements are in good agreement to those calculated theoretically.