Magnetic, dielectric and transport characteristics of Ln2CoMnO6 (Ln=Nd and Sm) double perovskite ceramics
Magnetic, dielectric and transport characteristics of Ln2CoMnO6 (Ln=Nd and Sm) double perovskite ceramics
复制标题
Ln2CoMnO6（Ln=Nd和Sm）双钙钛矿陶瓷的磁、介电和输运特性
DOI：
10.1016/j.jmmm.2014.07.017
复制
发表时间：
2014
期刊：
影响因子：
--
通讯作者：
X. M. Chen
中科院分区：
文献类型：
--
作者：
W. Yang;Xinggao Liu;Zhao Hui;X. M. Chen
Magnetic and dielectric properties of Nd2CoMnO6and Sm2CoMnO6double perovskite ceramics have been investigated by comparing with those of La2CoMnO6and Ln2NiMnO6(Ln=La, Nd and Sm) ceramics. Differing from the single magnetic state of Ln2NiMnO6(Ln=La, Nd and Sm) ceramics, both Nd2CoMnO6and Sm2CoMnO6are multiphase magnetic state with the monoclinic symmetry (space groupP21/n). Ferromagnetic Curie pointTCgenerally decreases with decreasing bond angles which depends on lanthanide ionic radius (RLn). This result indicates that the bond angle plays an important role in magnetic properties of Ln2MMnO6(Ln=La, Nd and Sm, M=Ni and Co) ceramics. Meanwhile, only one relaxor-like dielectric peak with strong frequency dispersion is observed in Nd2CoMnO6and Sm2CoMnO6ceramics, which is similar with that of La2CoMnO6. The dielectric constantε′ also decreases with decreasingRLn. Both magnetic and dielectric properties of Ln2CoMnO6(Ln=La, Nd and Sm) ceramics have similar variation tendency with decreasingRLn, and have been correlated with cos2, demonstrating some coupling between magnetic and dielectric response. In addition, transport behaviors of the present ceramics conform to the three-dimensional variable-range hopping mechanism, which may be attributed to the phase separation nature.
影响因子：
2.5
作者：
Ravel, B;Newville, M
通讯作者：
Newville, M
DOI：
10.1002/pssa.200669549
发表时间：
2006-09
期刊：
physica status solidi (a)
影响因子：
--
作者：
K. Yoshii;N. Ikeda;M. Mizumaki
通讯作者：
K. Yoshii;N. Ikeda;M. Mizumaki