A Magentoelectric Coefficient Measurement System with a Free-Stress Sample Holder

With\r\nless extra stress on the testing sample, a free-stress sample holder was\r\ndesigned to place the sample horizontally. With the free-stress sample holder,\r\na magnetoelectric (ME) coefficient measurement system was developed based on\r\ndynamic method. This measurement system has the hardware part and the software\r\npart, integrated by the DC magnetic field generation module, the AC magnetic\r\nfield generation module, the induced ME voltage detecting module and PC\r\nsoftware module. Then, a sample of Terfenol-D/PZT/Terfenol-D trilayer was designed\r\nand fabricated, and the relationships of its ME coefficient influenced by the\r\nDC magnetic field and the frequency of the AC magnetic field were tested using\r\nthe measurement system. And the results showed that the free-stress sample\r\nholder was proven to improve the accuracy of the measurement system by less\r\nstress interference.