The magnetostriction in garnet ferrite Y_1.8Bi_1.2Fe_3.5Ga_1.5O₁₂ synthesizing by the modified method of gel combustion using ethylene glycol

The temperature dependence of the magnetostriction constant of yttrium–bismuth iron garnet with Fe3+ ions replaced by Ga3+ has been studied. The description of the improved technology for the synthesis of bulk samples, the results of X-ray diffraction analysis and the study of the microstructure are given. A change in the sign of the magnetostriction constant versus temperature, which is associated with a spin-orientation transition, is found.