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The optical magnetic sensor using Nd doped TiO<SUB>2</SUB> thin films
S. Harako,X. Zhao,F. Jing,S. Komuro,H. Aizawa,C. Nakayama,K. Otubo,T. Katsumata 제어로봇시스템학회 2008 제어로봇시스템학회 국제학술대회 논문집 Vol.2008 No.10
A TiO2:Nd formed on Si(100) substrate by laser ablation. The TiO2:Nd shows IR emissions at room temperature. The superconducting magnet was used for applied of a magnetic field. Magnetic field intensity was changed from 0.0 T (Tesla) to 8.0 T with PL measurement at room temperature. The sharp intense PL peak at 913.5 nm, 933.3 nm, 954.6 nm, 1093.7 nm and 1382.7 nm originating from the intra-4f shell transition in Nd<SUP>3+</SUP> ions was observed. The spectrum form change was according to the Zeeman effect with the rise of magnetic field intensity.
Deliberation of fluorescent material by used in low temperature measurement
Y. Miyazaki,M. Watabiki,T. Sindo,H. Aizawa,T. Katsumata,S. Komuro 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
A possibility of low temperature measurement using fluorescence material was examined. Temperature dependence of fluorescence lifetime applied to low temperature measurement. Inorganic fluorescence material is known as a suitable sensor material for temperature measurement. Ruby was used as a sensor material because of bright fluorescence and long fluorescence lifetime. Fluorescence thermometer using the ruby which is modified for temperature measurement has been fabricated. From this research, ruby crystal is found to be useful as the sensor head for fluorescence thermometer. In addition, the ruby crystal is potentially useful material for the sensor head crystals to measure low temperature below 273K.