Study on magnetic and dielectric properties of YMnO3 ceramics

Study on magnetic and dielectric properties of YMnO3 ceramics
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YMnO3陶瓷的磁介电性能研究

DOI:
10.1016/j.jallcom.2011.04.128
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发表时间:
2011-07
影响因子:
6.2
通讯作者:
Wang, Zhijun
Wang, Zhijun
中科院分区:
材料科学2区
文献类型:
--
作者:
Zhu, Jinsong;Su, Jie;Wang, Xiaofei;Huang, Fengzhen;Zhang, Junting;Liu, Yaoyang;Zhang, Liang;Min, Kangli;Wang, Zhijun

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研究了溶胶-凝胶法合成的六方晶系YMnO 3陶瓷的磁性和介电性能。在YMnO_3陶瓷中,在70 K附近出现反铁磁有序,在5 K附近出现弱铁磁有序。此外,我们还观察到了低温下的交换偏置效应,这可能是由于在某些温度范围内铁磁序和反铁磁序共存时,在铁磁序和反铁磁序界面上的交换耦合引起的. YMnO 3陶瓷在290-430 K和500 K以上的介电性能表现出两种热激活弛豫行为,分别符合Arkenius定律,这两种弛豫行为可以解释为与Mn 2+和Mn 3+之间的载流子跳跃和氧空位有关的偶极效应。
The magnetic and dielectric properties were investigated in the hexagonal YMnO3ceramics synthesized by sol–gel method. An antiferromagnetic order about 70 K and a weak ferromagnetic order at 5 K have been detected in YMnO3ceramics. In addition, we observed also the exchange-bias (EB) effect at low temperatures and it may originate from exchange coupling at the interface between ferromagnetic and antiferromagnetic orders for the co-existence of these two orders in some temperature region in hexagonal YMnO3. Furthermore, the dielectric measurements showed two thermally activated relaxation behaviors following the Arrhenius law in 290–430 K and above 500 K in YMnO3ceramics and they can be explained as the dipolar effects associated with the charge carrier hopping between Mn2+and Mn3+and oxygen vacancy, respectively.
DOI: 10.1103/physrevb.62.9498
发表时间: 2000-10
期刊: Physical Review B
影响因子: 3.7
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