Structural, Optical and Magnetic Properties of Multiferroic GdMnO3 Nanoparticles

被引：43

作者：

Negi, P. ^{[1
]}

Dixit, G. ^{[1
]}

Agrawal, H. M. ^{[1
]}

Srivastava, R. C. ^{[1
]}

机构：

[1] Govind Ballabh Pant Univ Agr & Technol, Dept Phys, Pantnagar 263145, Uttar Pradesh, India

来源：

JOURNAL OF SUPERCONDUCTIVITY AND NOVEL MAGNETISM | 2013年 / 26卷 / 05期

关键词：

Multiferroic; X-ray diffraction; Rietveld refinement; Raman spectroscopy; Vibrating sample magnetometer;

D O I：

10.1007/s10948-012-1870-0

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The structural, optical, and magnetic properties of multiferroic GdMnO3 nanoparticles synthesized by the modified sol-gel route have been investigated. Raman spectroscopy and X-ray diffraction along with Rietveld refinement confirm the pure phase of the GdMnO3 nanoparticles having an orthorhombic perovskite (space group: Pnma) type structure. The morphology was examined by scanning electron microscopy. Energy dispersive spectroscopy confirms the stoichiometry of the composition. The room temperature UV-visible absorption spectrum using Tauc's relation gives an optical band gap of similar to 2.9 eV. A magnetization study of the GdMnO3 nanoparticles was performed over a temperature range of 2-300 K at an applied field of 0.05 T by using a vibrating sample magnetometer. An effective magnetic moment (mu(eff)) of similar to 9.2 mu(B) was obtained. The system is paramagnetic at room temperature and shows a ferromagnetic-like nature at 2 K as the applied magnetic field aligns the Gd moments and the contribution of the net moment of Gd spins is larger than that of the anti-ferromagnetically canted state of the Mn spins.

引用

页码：1611 / 1615

页数：5

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