Phonon spectra and magnetic behaviors of hydrothermally synthesized Sm-doped ZnO nanorods |
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| Affiliation: | 1. Department of Electrical Engineering, National Chung Hsing University, Taichung, Taiwan;2. Department of Electronic Engineering, Hsiuping University of Science and Technology, Taichung, Taiwan;3. Department of Physics, National Changhua University of Education, Changhua, Taiwan;4. Department of Electrical Engineering, Hsiuping University of Science and Technology, Taichung, Taiwan;1. Catalysis and Nanomaterials Research Laboratory, Department of Chemistry Loyola College, Chennai 600 034, India;2. Departments of Physics, College of Science, University of Bahrain, PO Box 32038 Kingdom of Bahrain;3. Materials Division, School of Advanced Sciences, Vellore Institute of Technology (VIT) University, Chennai Campus, Chennai 600 127, India;4. School of Materials Science and Engineering, Harbin Institute of Technology at Weihai, 2 West Wenhua Road, Weiahi 264209, China;1. College of Physics and Electronic Engineering, Key Laboratory of Atomic and Molecular Physics & Functional Materials of Gansu Province, Northwest Normal University, Lanzhou, Gansu 730070, PR China;2. National Laboratory of Solid State Microstructures & Eco-Materials and Renewable Energy Research Center (ERERC) at Department of Physics, Nanjing University, Nanjing 210093, PR China;3. Northwest University for Nationality, Lanzhou, Gansu 730030, PR China;4. Atech Systems, 6110 W. Highway 290, Austin, TX 78735, USA;1. Department of Applied Physics, Chandigarh University, Gharuan, Mohali, Punjab, India;2. Indo-US Science & Technology Forum, Fulbright House, 12, Hailey Road, New Delhi, India;3. Institute of Forensic Science & Criminology, Punjab University, Chandigarh, India;4. Nanomaterials and Environmental Sensors Research Laboratory, Department of Physics, Lucknow University, Lucknow, 226007, India;1. Department of Physics, University of the Free State, Bloemfontein ZA9300, South Africa;2. School of Physics, Shri Mata Vaishno Devi University, Katra 182320, J&K, India;1. Nano Sensors Lab @ Centre for Nano Technology & Advanced Biomaterials (CeNTAB), SASTRA University, Thanjavur, 613401 India;2. School of Electrical & Electronics Engineering (SEEE), SASTRA University, Thanjavur, 613401 India;3. Micro/Nano Technology Center, Tokai University, Japan |
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| Abstract: | Herein one-dimensional Sm-doped ZnO nanostructures have been successfully fabricated by a simple hydrothermal method at a low temperature of 90 °C. The effect of Sm doping on the microstructure, photoluminescence and magnetism of ZnO nanorods is also investigated. FE-SEM images show that the average diameter of the Sm-doped ZnO nanorods is obviously smaller than that of ZnO nanorods. Photoluminescence spectrum of Sm-doped ZnO nanorods shows a slightly red-shifted decrease of UV emission and an enhancement of photoluminescence performance of visible emission. Raman spectrum of Sm-doped ZnO nanorods reveals that the peak intensity corresponding to the E2 high mode decreases significantly compared with that of the pure ZnO nanorods, indicating the restraint of crystallization. Room temperature ferromagnetism is observed from magnetization curves of both ZnO and Sm-doped ZnO nanorods. The increase of the saturation magnetization induced by the Sm doping in the ZnO nanorods reveals an association with the increase of oxygen vacancies and oxygen interstitials. |
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