超巨磁电阻薄膜物理及应用  

Physics Applications of CMR Thin Film

作　　者：张鹏翔[1] 陈雪梅[2] 王茺[1] 常雷[3] 

机构地区：[1]昆明理工大学光电子新材料研究所,昆明650051 [2]昆明物理研究所,昆明650031 [3]北京工业大学国家产学研激光技术中心,北京100022

出　　处：《红外技术》2004年第3期53-62,共10页Infrared Technology

摘　　要：由于在外界温度变化和磁场作用下表现出巨大的磁电阻效应(CMR),超巨磁电阻材料成为一个热点研究课题。CMR材料在硬盘读出磁头,随机存储器上极具潜力,在磁传感器、光热辐射探测器、场效应晶体管及磁制冷等方面的应用也崭露头角。首先介绍了CMR薄膜材料的结构和机理,接着详细讨论了它们在器件应用上,尤其是在激光感生电压热电电压效应(LITV)、Bolometer、传感器等有关方面的应用进展。最后展望了CMR薄膜未来的应用前景。CMR thin film materials have become a hot task of study because they exhibit very dramatic changes in electric resistivity when temperature is changed and an external magnetic field is applied. Firstly extensive studies have been made on the materials as they have the great potential to be used as HDD read head and MRAM; secondly application on magnetic sensor,optic-thermal radiation detectors, field effect transistor and magnetic refrigerator have become noteworthy . In this paper, the structure and the mechanism of CMR materials are simply presented at first. And then, the late development of the materials on device fabrication, especially on the new laser induced thermoelectric voltage effect, bolometer and sensors, is discussed in detail. Finally, the future perspective of applications of CMR thin film materials is also discussed.

关 键 词：超巨磁电阻材料 激光感生热电势效应 探测器 磁制冷 场效应晶体管 晶体结构 

分 类 号：TM544[电气工程—电器]