Abstract We have studied the crystal structure and magnetic properties of Bi 0.84 La 0.16 Fe 1-x Ti x O 3 ( x = 0.02–0.1) at the morphotropic phase boundary of R 3 c , Imma , and Pbam phases. The results of Rietveld-refined X-ray diffraction patterns reveal the existence of multi-phase structures, including R 3 c + Imma for x = 0.02–0.06 and Imma + Pbam for x = 0.08–0.1. The studies of Raman scattering spectra indicate a structural transformation through the disappearance of typical R 3 c modes. This strongly influences the magnetic properties that are dependent on the crystalline phase ratio. In particular, the magnetic coercivity of x = 0.04–0.06 drastically changes when the Imma phase is dominant. A mechanism of magnetic interactions occurring at the phase boundary is proposed to explain the features of magnetic hysteresis loops of the compounds.

中文翻译：

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Ti掺杂Bi 0.84 La 0.16 FeO 3 同向相界的晶体结构和磁性能

摘要 我们研究了Bi 0.84 La 0.16 Fe 1-x Ti x O 3 ( x = 0.02–0.1) 在R 3 c 、Imma 和Pbam 相的同形相界的晶体结构和磁性能。Rietveld 精制 X 射线衍射图的结果揭示了多相结构的存在，包括 R 3 c + Imma（x = 0.02–0.06）和 Imma + Pbam（x = 0.08–0.1）。拉曼散射光谱的研究表明通过典型R 3 c 模式的消失而发生结构转变。这强烈影响取决于晶相比的磁性。特别是，当 Imma 相占主导地位时，x = 0.04-0.06 的矫顽力会发生剧烈变化。