Abstract

This paper presents a detailed study of the magnetic and crystal structures of BaFe_{12 –x}Zn_xO₁₉ (0.25 ≤ x ≤ 1.5) Zn-substituted barium hexaferrite by Mössbauer spectroscopy, vibrating sample magnetometry, and X-ray diffraction. Partial heterovalent substitution of Zn²⁺ ions for Fe³⁺ ions demonstrates limited heterovalent isomorphism according to the scheme 2Fe³⁺ → Zn²⁺ + Fe⁴⁺, which satisfies the electroneutrality constraint. Mössbauer spectroscopy results indicate the presence of Fe⁴⁺ in the BaFe_{12 –x}Zn_xO₁₉ materials. The heterovalent isomorphous substitution limit has been determined to be x = 1.0. The formation of a zinc spinel has been shown to begin at x = 0.50 and its content increases with increasing zinc content. Data are presented on the predominant character of the substituent ion (Zn²⁺) distribution in the structure of barium hexaferrite. A correlation has been found between the chemical composition, phase separation, anisotropy of properties, and the temperature of the magnetic phase transition of BaFe_{12 –x}Zn_xO₁₉ (0.25 ≤ x ≤ 1.5).

中文翻译：

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Zn 2+取代的六角形钡铁氧体的化学组成，晶体结构与磁性之间的相关性

摘要

本文呈现钡铁氧体的磁性和晶体结构的详细研究_{12 - X}锌_X ø ₁₉（0.25≤ X ≤1.5）的Zn取代的钡由穆斯堡尔谱六方晶系铁氧体，振动样品磁强计，和X射线衍射。根据方案2Fe ³⁺ →Zn ²⁺ + Fe ⁴⁺，将Zn ²⁺离子部分取代为Fe ³⁺离子显示出有限的同价同构性，满足电子中性约束。Mössbauer光谱结果表明BaFe _{12 – x} Zn _x中存在Fe ⁴⁺O ₁₉材料。杂合同构取代极限已确定为x = 1.0。已显示锌尖晶石的形成始于x = 0.50，并且其含量随锌含量的增加而增加。给出了有关六价铁酸钡结构中取代离子（Zn ²⁺）分布的主要特征的数据。的相关性已经发现的化学组成，相分离，特性的各向异性，和钡铁氧体的磁相变温度之间_{12 - X}锌_X ø ₁₉（0.25≤ X ≤1.5）。