Magnetoelectric effect in multiferroic NdMn2O5  

作　　者：Syed Hamad Bukhari Javed Ahmad 

机构地区：[1]Department of Physics, Bahauddin Zakariya University, Multan 60800, Pakistan

出　　处：《Chinese Physics B》2017年第1期526-529,共4页中国物理B（英文版）

基　　金：supported by Higher Education Commission(HEC)of Pakistan through its IRSIP scholarship program(IRSIP 27 PS 28)

摘　　要：We have measured the dielectric constant for NdMn2O5 in an external magnetic field to map out the magnetoelectric phase diagram. The phase diagram corresponds well with the previously reported data of neutron diffraction and magnetic susceptibility. Our main finding is the observation of a dielectric anomaly in the low temperature phase with a strong magnetoelectric effect, which is attributed to the independent Nd^3＋ ordering. Moreover, the absence of the dielectric anomaly in the paramagnetic phase is discussed, keeping in view the exchange interaction and its dependence on the rareearth R^3＋ ionic radius.We have measured the dielectric constant for NdMn2O5 in an external magnetic field to map out the magnetoelectric phase diagram. The phase diagram corresponds well with the previously reported data of neutron diffraction and magnetic susceptibility. Our main finding is the observation of a dielectric anomaly in the low temperature phase with a strong magnetoelectric effect, which is attributed to the independent Nd^3＋ ordering. Moreover, the absence of the dielectric anomaly in the paramagnetic phase is discussed, keeping in view the exchange interaction and its dependence on the rareearth R^3＋ ionic radius.

关 键 词：sol–gel synthesis dielectric constant magnetoelectric effect phase transition 

分 类 号：O482.5[理学—固体物理]