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本文对稀土－铁系超磁致伸缩材料的基本特性及应用前景进行了回顾与总结，剖析了该材料应用器件原理及结构，系统地介绍了国外稀土铁系超磁致伸缩材料在各个领域的应用及开发情况。展示了作者研制的低频水声换能器，该换能器具有低频、宽频带及电流灵敏度高的特点。
In this paper, the basic characteristics and application prospect of rare earth-iron-based giant magnetostrictive materials are reviewed and summarized. The principles and structure of the applied devices are analyzed. The rare earth-based giant magnetostrictive materials in foreign countries are systematically introduced Application and development. The low-frequency underwater acoustic transducer developed by the author is demonstrated. The transducer has the characteristics of low frequency, wide frequency band and high current sensitivity.