Iron doped hexagonal ErMnO3: structural, magnetic, and dielectric properties

Authors

P Liu, University of WollongongFollow
Z X. Cheng, University of WollongongFollow
Xiaolin Wang, University of WollongongFollow
Y Du, University of WollongongFollow
Z W. YuFollow
S X. Dou, University of WollongongFollow
H Z. Zhao, National Institute Materials Science, Japan
Kiyoshi Ozawa, National Institute For Materials ScienceFollow
H Kimura, National Institute For Materials Science

RIS ID

57439

Publication Details

Liu, P, Cheng, ZX, Wang, XL, Du, Y, Yu, ZW, Dou, SX, Zhao, HZ, Ozawa, K & Kimura, H (2012), Iron doped hexagonal ErMnO3: structural, magnetic, and dielectric properties, Journal of Nanoscience and Nanotechnology, 12(2), pp. 1238-1241.

Abstract

The single phase ErFe_xMn_1−xO₃ (0 ≤ x ≤ 0.15) compounds were synthesized by the solid-state reaction method. The doping effects on the crystal structural, magnetic, thermal, and dielectric properties were systematically investigated. The XRD patterns show all samples crystallize in the hexagonal structure with P6₃cm space group. The lattice parameters a and c first decrease with doping, which is followed by a subsequent increase at higher doping levels. Although both the Fe³⁺ and Mn³⁺ ions remain stable in high spin trivalent states in all samples, the magnetization is weakened with increasing Fe contents. The heat capacity data shows the antiferromagnetic transition slightly shifts from 77 K for ErMnO₃ to 80 K for ErFe_0.15Mn_0.85O₃, which can not be observed in the magnetic susceptibility data. The real part of complex impedance of these samples rises as the doping level increases, indicating the enhancement of insulativity of doped samples.