The effect of magnesium impurities on the optical and spectral characteristics of calcium orthovanadate single crystals doped with chromium and manganese

IF 1.7 4区材料科学 Q3 CRYSTALLOGRAPHY Journal of Crystal Growth Pub Date : 2024-09-29 DOI:10.1016/j.jcrysgro.2024.127908

I.S. Voronina , M.E. Doroshenko , E.E. Dunaeva , S.S. Zykova , L.D. Iskhakova , L.I. Ivleva

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Abstract

The effect of magnesium co-doping on growth conditions, crystal composition, optical and spectral properties of manganese or chromium-doped Ca₃(VO₄)₂ (CVO) crystal was studied. The single crystals were grown by the Czochralski method. Effective segregation coefficients of manganese and chromium in the CVO matrix with magnesium co-doping were calculated. A redistribution of the absorption lines intensities was observed in the absorption spectra of CVO:Mn:Mg and CVO:Cr:Mg. Low (15 K) temperature fluorescence measurements confirmed that co-doping CVO crystal with Mg ions leads to the redistribution of Mn ions concentration in different valence states, but does not cause changes in their spectral properties. In the presence of magnesium, additional annealing of the materials resulted in a slower reduction of the valence state of doping ions and a noticeable change in crystal coloration. All investigated impurities have practically no effect on the specific ferroelectric domain structure of CVO.

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镁杂质对掺杂铬和锰的正钒酸钙单晶体的光学和光谱特性的影响

研究了镁共掺对锰或铬掺杂的 Ca3(VO4)2 (CVO) 晶体的生长条件、晶体组成、光学和光谱特性的影响。单晶体采用 Czochralski 法生长。计算了镁共掺的 CVO 基体中锰和铬的有效偏析系数。在 CVO:Mn:Mg 和 CVO:Cr:Mg 的吸收光谱中观察到了吸收线强度的重新分布。低温（15 K）荧光测量证实，在 CVO 晶体中共同掺入镁离子会导致不同价态的锰离子浓度重新分布，但不会导致其光谱特性发生变化。在有镁存在的情况下，材料的额外退火会导致掺杂离子价态的降低速度减慢，晶体颜色发生明显变化。所有研究的杂质对 CVO 的特定铁电畴结构几乎没有影响。

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来源期刊

Journal of Crystal Growth 化学-晶体学

CiteScore

3.60

自引率

11.10%

发文量

373

审稿时长

65 days

期刊介绍： The journal offers a common reference and publication source for workers engaged in research on the experimental and theoretical aspects of crystal growth and its applications, e.g. in devices. Experimental and theoretical contributions are published in the following fields: theory of nucleation and growth, molecular kinetics and transport phenomena, crystallization in viscous media such as polymers and glasses; crystal growth of metals, minerals, semiconductors, superconductors, magnetics, inorganic, organic and biological substances in bulk or as thin films; molecular beam epitaxy, chemical vapor deposition, growth of III-V and II-VI and other semiconductors; characterization of single crystals by physical and chemical methods; apparatus, instrumentation and techniques for crystal growth, and purification methods; multilayer heterostructures and their characterisation with an emphasis on crystal growth and epitaxial aspects of electronic materials. A special feature of the journal is the periodic inclusion of proceedings of symposia and conferences on relevant aspects of crystal growth.