Details

Autor(en) / Beteiligte

• Ma, Jiashuai
• Jiao, Jie
• Fang, Cong
• Deng, Hao
• Wang, Sheng
• Lin, Di
• Xu, Haiqing
• Zhao, Xiangyong
• Luo, Haosu

Titel

Improvement of magnetoelectric properties in metglas/Pb(Mg1/3Nb2/3)O3–PbTiO3/metglas laminates with screen-printed ID-electrodes by poling optimization

Ist Teil von

• Journal of alloys and compounds, 2016-01, Vol.656, p.793-797

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2016

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Poling method is very important for ferroelectric and piezoelectric materials and their applications. We propose an interdigitated (ID) electrodes geometry and screen-print the ID electrodes on cut 0.7Pb(Mg1/3Nb2/3)O3–0.3PbTiO3 plates. However, it is very hard to pole the piezoelectric phase without cracks, resulting in high dielectric loss and high dielectric noise in corresponding sensors, which should be avoided in ME magnetic sensor devices. Because there appears a malformed region between longitudinal beams and tips of transverse electrodes. In this paper, we propose and adopt high temperature poling technique to reduce the strain and internal stress to reduce cracks. Strain-temperature curve of PMN-PT has a peak at 100 °C and strain at 140 °C (0.32%) is less than ½ of that at 100 °C (0.66%) under the same tested voltage (1000 V/mm). The noise equivalent magnetic induction (NEB) numerical simulation indicates that ME composite with high temperature poled PMN-PT (140 °C) has the lowest NEB, demonstrating that high temperature poling technique can lower dielectric loss and enhance ME effect by improving piezoelectric effects gently. We model the cracks arising mechanism by engineering domain theory for malformation region cracks after polarization in ID electrodes case. Between the longitudinal beam and tips of transverse electrodes, there appear malformation regions after polarization, because its lower and left adjacent regions are lengthened after polarization. The malformation regions result in cracks spontaneously to increase the dielectric noise level. We adopt high temperature polarization technique to reduce the internal strain during polarization to reduce cracks. From the cracks photos and dielectric loss results, high temperature polarization technique functions well to eliminate a great proportion of cracks under 140 °C. Numerical simulation demonstrates high temperature polarization technique can improve the sensitivity of ME laminated composites, too. [Display omitted] •High temperature poling technique has been proposed to pole the PMN-PT plate with malformed region.•Kapton films are abandoned and mechanical loss and dielectric loss are.•Very low NEB of magnetoelectric laminated composites are fabricated.•The strain-temperature relation demonstrates the validity of high temperature poling technique.•NEB numerical simulation proofs the validity of high temperature poling technique.