Study complex impedance on LCMO thin film

• Main Authors: Yu Hung Chen, 陳昱宏
• Other Authors: GAIN HWA HWANG
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/11055937370865656767

碩士 === 高雄師範大學 === 物理學系 === 98 === Study high-frequency properties of La0.67Ca0.33MnO3/STO(001) thin film by using impedance measurement. This material has the characteristics of the colossal magnetoresistance by using DC resistance measurement in previous literature and impedance measurement has the same results in this experiment.Further more, explore the rate of change of reactance and equivalent circuit model simulate the material. Distinguish grain and grain boundary from La0.67Ca0.33MnO3 by using equivalent circuit model simulation and discuss the resistance, reactance, capacitance and relaxation time between grain and grain boundary. Further more, Discuss the scope of the internal magnetic moment ordering changes in the magnetic field. Although the materials used in the signal components through the magnetic resistance change,the capacitance changes significantly In the low field and expect this material can be used as magnetic content of component in the futher.