Designing tunable band-gap and magnetization at room-temperature in Pb(Ti1-xMx)O3-δ(M= Ni and Pd) thin films

作者：Zhou, Wenliang; Deng, Hongmei; Yang, Pingxiong^*; Chu, Junhao

来源：Materials Letters, 2016, 185: 323-326.

DOI：10.1016/j.matlet.2016.09.012

• Pb(Ti1-xMx)O3-delta
• Ferroelectrics
• Sol-gel preparation
• Thin films
• Optical and magnetic properties

The Pb(Ti1-xMx)O3-delta(M= Ni and Pd) ferroelectric thin films prepared by a sol-gel technique have been studied by means of structural characterizations, optical and magnetic measurements. X-ray diffraction and Raman scattering results reflect the visible changes in average structure. Moreover, d(8) M2+ doping has important effects on the energy band structure and magnetic orderings. Optical transmittance spectra analysis indicates that Pb(Ti0.85Ni0.15)O3-delta and Pb(Ti0.85Ni0.15)O3-delta thin films present small band gaps of 2.67 eV and 2.55 eV, respectively. Also, the as-grown Pb(Ti0.85Ni0.15)O3-delta thin films show room temperature ferromagnetism, in contrast to PbTiO3 which is diamagnetic. A bound magnetic polaron model can be employed to explain the observed ferromagnetic behavior.

• 出版日期2016-12-15
• 单位华东师范大学; 上海大学