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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Antiferromagnetism induced by oxygen vacancies in V2O5 polycrystals synthesized by the Pechini method
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Antiferromagnetism induced by oxygen vacancies in V2O5 polycrystals synthesized by the Pechini method

机译：Pechini方法合成的V2O5多晶体中氧空位引起的反铁磁性

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摘要

Optical and magnetic properties of V2O5 polycrystals were investigated through photoluminescence (PL) and magnetization measurements. The PL spectra comprise two main bands attributed to oxygen vacancies and to band-edge-related transitions. The magnetization measurements showed a predominant paramagnetic behavior in the temperature range studied (5 K-300 K) with a superimposed peak around 80 K associated with an antiferromagnetic phase. The temperature dependence of the magnetic results and the relative PL intensity presented a remarkable correlation while in the range of 80-200 K the intensity associated with oxygen vacancies became considerably more intense than band-to-band emissions, the same range in which the antiferromagnetic transition was observed. The observation of an antiferromagnetic phase in V2O5 was predicted in the literature although this result had not previously been measured experimentally. Raman spectroscopy was used as a complementary technique in order to exclude the presence of spurious vanadium oxide phases in the sample.
机译：通过光致发光（PL）和磁化测量研究了V2O5多晶体的光学和磁性。 PL谱包括两个主要谱带，这些谱带归因于氧空位和与谱带边缘相关的跃迁。磁化测量结果显示，在所研究的温度范围（5 K-300 K）中，主要的顺磁行为具有与反铁磁相相关的80 K附近的叠加峰。磁性结果的温度依赖性和相对PL强度呈现出显着的相关性，而在80-200 K的范围内，与氧空位相关的强度变得比带间发射强得多，在相同的范围内，观察到过渡。尽管先前尚未通过实验测量该结果，但在文献中已预料到了在V2O5中观察到反铁磁相的情况。拉曼光谱法被用作一种补充技术，以排除样品中存在伪钒氧化物相。

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