中国物理B ›› 2012, Vol. 21 ›› Issue (11): 117311-117311.doi: 10.1088/1674-1056/21/11/117311
• CONDENSED MATTER: ELECTRONIC STRUCTURE, ELECTRICAL, MAGNETIC, AND OPTICAL PROPERTIES • 上一篇 下一篇
Qurat-ul-ain Javed, Wang Feng-Ping, M. Yasir Rafique, Arbab Mohammad toufiq, M. Zubair Iqbal
Qurat-ul-ain Javed, Wang Feng-Ping, M. Yasir Rafique, Arbab Mohammad toufiq, M. Zubair Iqbal
摘要: We have reported new magnetic and optical properties of Mn2O3 nanostructures. The nanostructures have been synthesized by hydrothermal method combined with the adjustment of pH values in the reaction system. The particular characteristics of the nanostructures have been analyzed by employing X-Ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray (EDX) analysis, transmission electron microscopy (TEM), high resolution transmission electron microscopy (HRTEM), Raman spectroscopy (RS), UV-visible spectroscopy, and the vibrating sample magnetometer (VSM). Structural investigation manifests that the synthesized Mn2O3 nanostructures are orthorhombic crystal. Magnetic investigation indicates that the Mn2O3 nanostructures are antiferromagnetic and the antiferromagnetic transition temperature is at TN = 83 K. Furthermore, the Mn2O3 nanostructures possess canted antiferromagnetic order below the Neel temperature due to spin frustration, resulting in hysteresis with large coercivity (1580 Oe) and remanent magnetization (1.52 emu/g). The UV-visible spectrophotometry was used to determine the transmittance behavior of Mn2O3 nanostructures. Direct optical band gap of 1.2 eV was acquired by using Davis-Mott model. The UV-visible spectrum indicates that the absorption is prominent in visible region, and transparency is more than 80% in UV region.
中图分类号: (Nanocrystalline materials)