The traditional method of ferrite synthesis is based upon solid‐state reaction. The advantages of this approach include simplicity, cost effectiveness, and suitability for commercial process scaling. However, there exist shortcomings in that impurities and defects adversely affect magnetic properties. Here, iron‐depleted compositions of bismuth‐substituted yttrium iron garnet (ie Bi:YIG) were studied with emphasis placed on the impact of synthesis processing parameters upon the structure and gyromagnetic properties. It was shown that ferrimagnetic resonance linewidth experienced a minimum of 180.3 Oe (X‐band) when the sample stoichiometry was 4% depleted in iron (x = 0.2), a reduction of 29.3% from the parent compound. Concomitantly, iron depletion caused a systematic change in lattice parameter that resulted in a dilation of Goodenough‐Kanamori‐Anderson bond angles increasing exchange energy and magnetization. The substitution of Bi for Y on the dodecahedron sites altered the reaction path and decreased the activation energy effectively reducing sintering temperature. To establish a functional processing protocol, an ion diffusion model is presented to explain the demonstrated processing, structure, and performance paradigm.

中文翻译：

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增强铁磁性能的贫铁Bi-YIG适用于LTCC处理

铁氧体的传统合成方法基于固态反应。这种方法的优点包括简单，成本效益高，以及适用于商业流程规模化。但是，存在杂质和缺陷不利地影响磁性能的缺点。在这里，研究了铋取代的钇铁石榴石（即Bi：YIG）的贫铁成分，重点是合成工艺参数对结构和回旋磁性能的影响。结果表明，当样品的化学计量比铁减少4％时，铁磁共振线宽至少达到180.3 Oe（X波段）（x = 0.2），比母体化合物减少29.3％。同时，铁的消耗导致晶格参数发生系统性变化，从而导致Goodenough-Kanamori-Anderson键角膨胀，从而增加了交换能量和磁化强度。在十二面体位点上，Bi取代Y改变了反应路径，降低了活化能，有效降低了烧结温度。为了建立功能处理协议，提出了一种离子扩散模型来解释所证明的处理，结构和性能范例。