Effect of Aluminum Substitution on the Structural, Magnetic, and Magnetothermal Properties of Yttrium Iron Garnet

Y3Fe5 – xAlxO12 (х = 0, 0.5, 1.0, 1.5, 2.0) materials prepared by sol–gel synthesis have been characterized by scanning electron microscopy, X-ray diffraction, Raman and Mössbauer spectroscopies, field- and temperature-dependent saturation magnetization measurements, and magnetocaloric measurements in an ac magnetic field. We have examined the effect of aluminum concentration on the magnetic and crystal structures and magnetothermal properties of the garnet ferrite particles.