X-ray induced defects and thermoluminescent properties of lanthanum hexaaluminates with magnetoplumbite-like structure |
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| Affiliation: | 1. School of Electronic and Information Engineering, Chongqing Three Gorges University, Chongqing, Wanzhou, 404000, China;2. Chongqing Key Laboratory of Geological Environment Monitoring and Disaster Early-warning in Three Gorges Reservoir Area, Chongqing Three Gorges University, Chongqing, Wanzhou, 404000, China;3. State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou, 730050, China;4. College of Materials Science and Engineering, Sichuan University, 610064, Chengdu, China;5. Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Sichuan, Mianyang, 621900, China;6. School of Science, Chongqing University of Posts and Telecommunications, Nan''an District, 400065, Chongqing, China;1. Instituto de Investigación en Metalurgia y Materiales de la Universidad Michoacana de San Nicolás de Hidalgo, Edif. “U”, C.U. 58060 Morelia, Michoacán, Mexico;2. Universidad Autónoma Metropolitana-Iztapalapa, Av. San Rafael Atlixco, Col. Vicentino, 09340 México City, Mexico;3. Instituto Politécnico Nacional, Centro de Investigación en Ciencia Aplicada y Tecnología Avanzada-Legaria, Av. Legaria 694, 11500 México City, Mexico;1. School of Physics and Optoelectronic Engineering, Guangdong University of Technology, WaiHuan Xi Road, No. 100, Guangzhou, Guangdong, 510006, China;2. School of Electronics and Electrical Engineering, Zhaoqing University, Yingbin Avenue, Duanzhou District, Zhaoqing, Guangdong, 526061, China;1. Department of Physics, Ponjesly College of Engineering, Nagercoil, Tamil Nadu, India;2. Holy Grace Academy of Engineering, Trissur, Kerala, India |
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| Abstract: | This work presents an electron spin resonance and optical study of the defects produced by X-ray irradiation of the lanthanum aluminate La(Mg1−yMny)xAl11O18+x (x, y ≤ 1). The thermal bleaching of these defects is responsible for an intense green thermoluminescence due to the 4T1-6A1 transition of Mn2+ ions of the lattice. The mechanism of this thermoluminescence and its variation with manganese concentration are discussed. |
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