TY - JOUR
T1 - Bandgap modulation and magnetic switching in PbTiO3 ferroelectrics by transition elements doping
AU - Zheng, Tuo
AU - Deng, Hongmei
AU - Zhou, Wenliang
AU - Zhai, Xuezhen
AU - Cao, Huiyi
AU - Yu, Lu
AU - Yang, Pingxiong
AU - Chu, Junhao
N1 - Publisher Copyright:
© 2016 Elsevier Ltd and Techna Group S.r.l.
PY - 2016/4/1
Y1 - 2016/4/1
N2 - Transition metal (TM=Fe, Ni and Mn) ions doped PbTiO3 perovskite ferroelectric ceramics prepared by a solid state reaction method have been studied by means of structural characterizations, optical and magnetic measurements. All the samples have pure tetragonal perovskite structure, but exhibit different grain shapes and sizes with the introduction of TM ions and oxygen vacancies. The observed structural changes arise from internal lattice strain, which is estimated by Williamson-Hall (W-H) analysis model. Moreover, TM ions doping plays simultaneously an important role on the energy band structure and magnetic orderings. The energy gap of PbTi0.95TM0.05O3-δ shows a drastic decrease compared to that of PbTiO3. Furthermore, PbTi0.95TM0.05O3-δ materials possess multiple magnetism switching, in which diamagnetic-ferromagnetic transition and ferromagnetic-paramagnetic transition occur. In particular, the Fe-doped PbTiO3 ceramic presents a typical ferromagnetic hysteresis, originating from the effective exchange coupling interaction between oxygen vacancies and Fe 3d spins.
AB - Transition metal (TM=Fe, Ni and Mn) ions doped PbTiO3 perovskite ferroelectric ceramics prepared by a solid state reaction method have been studied by means of structural characterizations, optical and magnetic measurements. All the samples have pure tetragonal perovskite structure, but exhibit different grain shapes and sizes with the introduction of TM ions and oxygen vacancies. The observed structural changes arise from internal lattice strain, which is estimated by Williamson-Hall (W-H) analysis model. Moreover, TM ions doping plays simultaneously an important role on the energy band structure and magnetic orderings. The energy gap of PbTi0.95TM0.05O3-δ shows a drastic decrease compared to that of PbTiO3. Furthermore, PbTi0.95TM0.05O3-δ materials possess multiple magnetism switching, in which diamagnetic-ferromagnetic transition and ferromagnetic-paramagnetic transition occur. In particular, the Fe-doped PbTiO3 ceramic presents a typical ferromagnetic hysteresis, originating from the effective exchange coupling interaction between oxygen vacancies and Fe 3d spins.
KW - Ferroelectric ceramics
KW - Ferromagnetism
KW - Optical properties
KW - PbTiTMO
UR - https://www.scopus.com/pages/publications/84954287188
U2 - 10.1016/j.ceramint.2015.12.157
DO - 10.1016/j.ceramint.2015.12.157
M3 - 文章
AN - SCOPUS:84954287188
SN - 0272-8842
VL - 42
SP - 6033
EP - 6038
JO - Ceramics International
JF - Ceramics International
IS - 5
ER -