Abstract

The effect of an organic fuel on the combustion mode, features of combustion, and the phase composition of the end product of the synthesis of yttrium orthoferrite was studied. It was shown that the production of YFeO₃ requires a fuel that favors the formation of a single polymer metal-containing complex determining the gel structure and ensures the combustion in an intense self-sustaining mode. Yttrium orthoferrite was synthesized by gel combustion using a mixture of citric acid and ammonium nitrate as a fuel. The unit cell parameters of orthorhombic (space group Pnma) yttrium orthoferrite were found to be a = 5.594(2) Å, b = 7.604(3) Å, c = 5.282(1) Å, and V = 224.7(3) ų. The temperature dependence of the specific magnetization of YFeO₃ in the range 80–800 K was investigated. The temperature of the magnetic phase transformation magnetic order–magnetic disorder was determined to be T_C ~ 620 K.

中文翻译：

---

凝胶燃烧法合成钇铁氧体的合成及磁性

摘要

研究了有机燃料对钇正铁酸钇合成的燃烧方式，燃烧特性和最终产物的相组成的影响。结果表明，YFeO ₃的生产需要一种燃料，该燃料有利于形成确定凝胶结构的单一含金属聚合物配合物，并确保强烈的自我维持模式下的燃烧。用柠檬酸和硝酸铵的混合物作为燃料，通过凝胶燃烧合成原酸钇。发现斜方晶（空间群Pnma）钇正铁氧体的晶胞参数为a = 5.594（2）Å，b  = 7.604（3）Å，c = 5.282（1）Å，V = 224.7（3）ų。研究了YFeO ₃比磁化强度在80-800 K范围内的温度依赖性。测定磁相变磁顺序磁性病症的温度为Ť _Ç〜620 K.