Colossal magnetoelectric response of PZT thick films on Ni substrates with a conductive LaNiO3 electrode

• Published in: Journal of physics. D, Applied physics Vol. 46; no. 9
• Main Authors: Kambale, Rahul C, Patil, Deepak, Ryu, Jungho, Chai, Yi Sheng, Kim, Kee Hoon, Yoon, Woon-Ha, Jeong, Dae-Yong, Park, Dong-Soo, Kim, Jong-Woo, Choi, Jong-Jin, Ahn, Cheol-Woo
• Format: Journal Article
• Language: English
• Published: Bristol IOP Publishing 06.03.2013; Institute of Physics
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Magnetic properties and materials; Magnetomechanical and magnetoelectric effects, magnetostriction; Physics; Magnetomechanical effects; Thick films; Magnetic field effects; PZT; Low field; Lanthanum oxide; Composite materials; Bias voltage; Magnetoelectric effects; Resonance frequency; Aerosol deposition; Stress effects; Nickel; Nickel oxide
• ISSN: 0022-3727; 1361-6463
• DOI: 10.1088/0022-3727/46/9/092002

We have characterized the magnetoelectric (ME) properties of Pb(ZrTi)O3/LaNiO3/Ni (PZT/LNO/Ni) composites, which are fabricated using aerosol deposition. LNO acted as the bottom electrode for the PZT film and could effectively transfer the stress generated through the magnetostrictive effect of Ni into the piezoelectric PZT film. The PZT/LNO/Ni ME structure exhibits an ME coefficient αE31 = 1 V cm−1 Oe−1 at a very low bias magnetic field of 30 Oe and shows 8.5 V cm−1 Oe−1 at a magneto-mechanical resonance frequency of 204 kHz corresponding to the Ni substrate. These huge ME coefficients are attributed to the improved coupling between the magnetostrictive Ni layer and the piezoelectric PZT thick film via the LNO layer, which is possible due to similar mechanical impedances of Ni, LNO and PZT.