Effect of Microstructure on Magnetoelectric Properties of 0.9Pb(Zr_(0.52)Ti_(0.48))O_3-0.1Pb(Zn_(1/3)Nb_(2/3))O_3 and Ni_(0.8)Zn_(0.2)Fe_2O_4 Particulate Composites

摘要

The effects of magnetostrictive particle distribution on magnetoelectric (ME) properties were investigated in a 3-0 ME composite made of piezoelectric [0.9Pb(Zr_(0,52)Ti_(0.48))O_3-0.1Pb(Zn_(1/3)Nb(2/3))O_3 + 0.005Mn; PZT-PZN] and 20wt% magnetostrictive (Ni_(0.8)Zn_(0.2)Fe_2O_4; NZF) materials. X-ray diffraction (XRD) analysis and energy dispersive X-ray spectroscopy (EDS) results showed that PZT-PZN and NZF did not react with each other and coexisted without severe inter-diffusion. The larger interface area due to the smaller particle size offered greater Fe~(3+) diffusion into the piezoelectric PZT-PZN, which increased the piezoelectric mechanical quality factor of the 3-0 composite. In addition, the ME property (dE/dH) was also enhanced by the smaller NZF particle size, and this enhancement was attributed to the magnetically induced, homogeneous stress field exerted by NZF onto PZT-PZN.