Canted antiferromagnetic and optical properties of nanostructures of Mn2O3 prepared by hydrothermal synthesis

doi:10.1088/1674-1056/21/11/117311

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

Canted antiferromagnetic and optical properties of nanostructures of Mn₂O₃ prepared by hydrothermal synthesis

Qurat-ul-ain Javed, Wang Feng-Ping, M. Yasir Rafique, Arbab Mohammad toufiq, M. Zubair Iqbal

Department of Physics, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China

收稿日期:2012-06-26 修回日期:2012-07-14 出版日期:2012-10-01 发布日期:2012-10-01
基金资助:
Project supported by the Fundamental Development Fund and Chancellor Scholarship Program, China (Grant No. YJ2010-014) and the Fundamental Research Funds for the Central Universities of China (Grant No. FRF-BR-09-007A).

Canted antiferromagnetic and optical properties of nanostructures of Mn₂O₃ prepared by hydrothermal synthesis

Qurat-ul-ain Javed, Wang Feng-Ping, M. Yasir Rafique, Arbab Mohammad toufiq, M. Zubair Iqbal

Department of Physics, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China

Received:2012-06-26 Revised:2012-07-14 Online:2012-10-01 Published:2012-10-01
Contact: Wang Feng-Ping E-mail:fpwang@ustb.edu.cn
Supported by:
Project supported by the Fundamental Development Fund and Chancellor Scholarship Program, China (Grant No. YJ2010-014) and the Fundamental Research Funds for the Central Universities of China (Grant No. FRF-BR-09-007A).

摘要/Abstract

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 T_N = 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.

关键词: Mn₂O₃ orthorhombic nanocrystals, UV transparency, canted antiferromagnetic property

Abstract: 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 T_N = 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.

Key words: Mn₂O₃ orthorhombic nanocrystals, UV transparency, canted antiferromagnetic property

中图分类号: (Nanocrystalline materials)

73.63.Bd

78.40.-q (Absorption and reflection spectra: visible and ultraviolet) 75.10.-b (General theory and models of magnetic ordering) 75.75.-c (Magnetic properties of nanostructures)

Qurat-ul-ain Javed, Wang Feng-Ping, M. Yasir Rafique, Arbab Mohammad toufiq, M. Zubair Iqbal . Canted antiferromagnetic and optical properties of nanostructures of Mn₂O₃ prepared by hydrothermal synthesis[J]. 中国物理B, 2012, 21(11): 117311-117311.

Qurat-ul-ain Javed, Wang Feng-Ping, M. Yasir Rafique, Arbab Mohammad toufiq, M. Zubair Iqbal. Canted antiferromagnetic and optical properties of nanostructures of Mn₂O₃ prepared by hydrothermal synthesis[J]. Chin. Phys. B, 2012, 21(11): 117311-117311.

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Canted antiferromagnetic and optical properties of nanostructures of Mn₂O₃ prepared by hydrothermal synthesis

Canted antiferromagnetic and optical properties of nanostructures of Mn₂O₃ prepared by hydrothermal synthesis

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