An Electron Paramagnetic Resonance Study of the Orbital Ordering Compound MgTi2O4

An Electron Paramagnetic Resonance Study of the Orbital Ordering Compound MgTi2O4
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轨道有序化合物MgTi2O4的电子顺磁共振研究

DOI:
10.1007/s00723-015-0653-8
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发表时间:
2015
影响因子:
1
通讯作者:
Shi Jing
Shi Jing
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
Zhu Yuanyuan;Wang Rongjuan;Wang Li;Liu Yong;Xiong Rui;Shi Jing

文献摘要

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我们报告了 MgTi2O4 在 300–140 K 范围内的电子顺磁共振 (EPR) 研究。在转变温度 Tt(~258 K)以上,EPR 结果表明 MgTi2O4 具有顺磁性。 EPR 谱图的参数在 Tt 处显示出异常变化。在Tt和220 K之间的温度下可以观察到清晰的EPR线。此外,EPR强度、g值和EPR线宽随着温度的降低而增加;在低于 220 K 的温度范围内,无法检测到清晰的 EPR 线。 EPR谱结果表明,在低温范围内,MgTi2O4体系的磁性自旋单线态和轨道密度波是随着温度的降低而逐渐形成的。
We report the electron paramagnetic resonance (EPR) studies of MgTi2O4in the 300–140 K range. Above the transition temperatureTt(~258 K), the EPR results indicate that MgTi2O4is paramagnetic. The parameters of the EPR spectra show an anomalous change atTt. The clear EPR lines can be observed in temperature betweenTtand 220 K. Besides that the EPR intensity,gvalue, and EPR linewidth increase with decreasing temperature; in temperature range below 220 K, no clear EPR line can be detected. The EPR spectra results demonstrate that magnetic spin-singlet state and the orbital density wave of MgTi2O4system are formed gradually with decreasing temperature at low temperature range.