Enhanced magnetoelectric effect in M-type hexaferrites by Co substitution into trigonal bi-pyramidal sites
Enhanced magnetoelectric effect in M-type hexaferrites by Co substitution into trigonal bi-pyramidal sites
复制标题
DOI：
10.1063/1.5017683
复制
发表时间：
2018-02-19
影响因子：
4
通讯作者：
Dhesi, S. S.
中科院分区：
文献类型：
--
作者：
Beevers, J. E.;Love, C. J.;Dhesi, S. S.
用磁测量和元素专用软X射线能谱相结合的方法研究了M型掺钛锶铁氧体的磁电效应。当Co2+进入三角双锥晶位时，磁电系数有较大幅度的增加(>；x 30)。基于磁性过渡金属(TM)离子的位移，5重三角双锥体位提供了一种不同寻常的极化机制。对于进入这一位置的Co，阳离子的偏心位移可能会引起较大的局部电偶极子，并提供增强的磁致伸缩，增强磁电效应。由AIP出版公司出版。
The magnetoelectric effect in M-type Ti-Co doped strontium hexaferrite has been studied using a combination of magnetometry and element specific soft X-ray spectroscopies. A large increase (> x 30) in the magnetoelectric coefficient is found when Co2+ enters the trigonal bi-pyramidal site. The 5-fold trigonal bi-pyramidal site has been shown to provide an unusual mechanism for electric polarization based on the displacement of magnetic transition metal (TM) ions. For Co entering this site, an off-centre displacement of the cation may induce a large local electric dipole as well as providing an increased magnetostriction enhancing the magnetoelectric effect. Published by AIP Publishing.