Pressure Effects on Magnetic Properties of La2/3Ca1/3MnO3+ Thin Films
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摘要: 研究了不同含氧量LaCaMnO的压力效应，发现随压力的增加富氧样品电阻率的变化和相变温度的改变都比较小。同时还对照研究了压力与磁场对材料的影响，发现压力对整个温区的电阻都有明显的影响，而磁场仅对相变温度附近温区有明显的影响，这从实验上证实了两者有着不同的作用机制。Abstract: Pressure effects on LaCaMnO thin films were studied experimentally. The results show that the resistivity and transition temperature of rich-oxygen samples are not sensitive to pressure. Based on the experimental results on the effects of pressure and temperature on CMR LaCaMnO samples, it is found that pressure also has effects on resistivity in the whole temperature range, but the magnetic field just affects the resistivity around transition temperature.
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Briatico J, AIascio B, Allub R, et al. Double-Exchange Interaction in Electron-Doped CaMnO3.5 Perovskites [J]. Phys Rev B, 1996, 53(21): 14020. Hwang H Y, Palstra T T M, Cheong S-W, et al. Pressure Effect on the Magnetoresistance in Doped Manganese Perovskites [J]. Phys Rev B, 1995, 52(21): 15046. Millis A J, Shraiman B I, Muller R. Dynamic Jahn-Teller Effect and Colossal Magnetoresistance in La1-xSrxMnO3 [J]. Phys Rev Lett, 1996, 77: 175. Liu Z X, Zheng D N, Wang J H, et al. Anisotropy of BiSrCaCuO Superconducting Single Crystals under High Pressure [J]. Chin Phys Lett, 1991, 1: 29. Hwang H Y, Cheong S-W, Radaelli P G, et al. Lattice Effect on the Magnetoresistance in Doped LaMnO3 [J]. Phys Rev Lett, 1995, 75: 914. Zhou J-S, Archibalt W, Goodenough J B. Identification of a New Type of Electronic State in the Magnetoresistive Orthomanganites [J]. Nature, 1996, 381: 770. Pickett W E, Singh D J. Electronic Structure and Half-Metallic Transport in La1-xCaxMnO3 System [J]. Phys Rev B, 1996, 53(3): 1146. -
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