期刊
MATERIALS RESEARCH EXPRESS
卷 4, 期 7, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/2053-1591/aa7a29
关键词
orthochromite; x-ray diffraction; magnetism; Raman scattering
In this manuscript, we have investigated the effect of Fe and Ni doping on the structure and magnetic properties of YCr1-xMxO3 ceramics (M = Fe, Ni and x = 0, 0.1). X-ray diffraction analysis of the samples accompanied with, Rietveld refinement suggested no change in the structure upon doping, with structure of the samples being orthorhombic (space group: Pnma). Raman spectroscopic analysis of the samples revealed that doping induced disorder leads to broadening of the certain Raman modes of the system. While, both B-3g(5) and B-1g(3) modes are broadened in Ni and Fe doped samples, in addition Fe doped samples also show broadening of B-1g(4) mode. In doped samples a new mode, A(1g)(3) appears due to the induced lattice disorder. Temperature dependent magnetic measurements suggested a negative value of Curie-Weiss temperature (theta(cw)) indicating that all the samples are antiferromagnetic. However, the Neel temperature (T-N) increased for Fe doping and decreased with Ni doping. These changes in the Neel temperature upon doping can be correlated to the changes in the nearest neighbor and next nearest neighbor exchange interactions.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据