Effect of replacing Fe with Ti on the electrical and dielectric properties of orthoferrite La0.7Ga0.3Fe1-xTixO3(x=0, 0.1, 0.2, and 0.3)

Ayachi S.; Hzez W.; Saadi M.; Rahmouni H.; Gassoumi M.; Khirouni K.; Alaya S.

首页> 外文期刊>Phase Transitions >Effect of replacing Fe with Ti on the electrical and dielectric properties of orthoferrite La0.7Ga0.3Fe1-xTixO3(x=0, 0.1, 0.2, and 0.3)

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Effect of replacing Fe with Ti on the electrical and dielectric properties of orthoferrite La0.7Ga0.3Fe1-xTixO3(x=0, 0.1, 0.2, and 0.3)

机译：用Ti替换Fe对Orthoferrite La0.7Fe1-Xtixo3电气和介电性能的影响（x = 0,0.1,0.2和0.3）

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La0.7Ga0.3Fel-xTixO3(x = 0, 0.1, 0.2, and 0.3) polycrystalline compounds were successfully prepared using the solid-solid process. The structural study proves that the samples are centrosymmetric at room temperature. From admittance spectroscopy, it is shown that the frequency dependence of conductivity is correctly fitted by the empirical Jonscher's law, implying a semiconductor behavior. The microstructure contribution into conductivity is discussed based on grain and grain boundary response in a wide frequency range. The activation energy of the conduction process was deduced. Then, mobile carriers can travel over neighboring and distant sites by the hopping process. According to the impedance analysis, just a single relaxation phenomenon is noticed. The magnitude of capacitance confirms the microstructure effect with ferroelectric feature. Dielectric study proves that the permittivity rise results mainly from interfacial and orientational polarizations.

机译：La0。7Ga0。采用固相法成功制备了3Fel-xTixO3（x=0,0.1,0.2和0.3）多晶化合物。结构研究证明，样品在室温下是中心对称的。从导纳光谱可以看出，电导率的频率依赖性符合经验琼舍尔定律，这意味着半导体行为。基于宽频率范围内的晶粒和晶界响应，讨论了微观结构对电导率的贡献。推导了导电过程的活化能。然后，移动运营商可以通过跳转过程在邻近和遥远的地点进行旅行。根据阻抗分析，只注意到一个弛豫现象。电容的大小证实了微结构效应具有铁电特性。介电研究表明，介电常数的上升主要是由界面极化和取向极化引起的。

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来源
《Phase Transitions》 |2020年第8期|共18页
作者
Ayachi S.; Hzez W.; Saadi M.; Rahmouni H.; Gassoumi M.; Khirouni K.; Alaya S.;
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作者单位

Univ Gabes Fac Sci Gabes Cite Erriadh Lab Phys Mat &

Nanomat Appl Environm Gabes Tunisia;

Univ Gabes Fac Sci Gabes Cite Erriadh Lab Phys Mat &

Nanomat Appl Environm Gabes Tunisia;

Univ Gabes Fac Sci Gabes Cite Erriadh Lab Phys Mat &

Nanomat Appl Environm Gabes Tunisia;

Univ Kairouan Kasserine Inst Super Sci Appl &

Technol Kasserine Unite Rech Mat Avances &

Nanotechnol Kairouan Tunisia;

Qassim Univ Coll Sci Dept Phys Buraydah Saudi Arabia;

Univ Gabes Fac Sci Gabes Cite Erriadh Lab Phys Mat &

Nanomat Appl Environm Gabes Tunisia;

Univ Gabes Fac Sci Gabes Cite Erriadh Lab Phys Mat &

Nanomat Appl Environm Gabes Tunisia;

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原文格式 PDF
正文语种 eng
中图分类物理学;
关键词
Orthoferrite; conductivity; hopping; permittivity;

机译：orthoferrite;电导率;跳跃;允许性;

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Effect of replacing Fe with Ti on the electrical and dielectric properties of orthoferrite La0.7Ga0.3Fe1-xTixO3(x=0, 0.1, 0.2, and 0.3)

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