Structure and magnetic properties of (Sm_1-xZr_x)Fe₁₁Ti (x=0-0.2) alloys

Compounds with a tetragonal structure of the ThMn₁₂ type have a high potential for creating on their basis permanent magnets with high energy density and operating temperatures up to 150 – 200 °C. In this work, samples of alloys (Sm_1-xZr_x)Fe₁₁Ti (x = 0 – 0.2) obtained by the rapidly quenching method with subsequent annealing were investigated. Depending on the chemical composition and modes of synthesis in alloys (Sm_1-xZr_x)Fe₁₁Ti (x = 0 – 0.2) phases of the ThMn₁₂, α-Fe type and a small amount of ZrFe₂ are formed, as well as phases with the Th₂Zn₁₇ structural type and TbCu₇ at high annealing temperatures. The best magnetic properties at room temperature are realized in the alloy (Sm_0.9Zr_0.1)Fe₁₁Ti after annealing at a temperature of 800 °C. (paper)