期刊：
Journal of Alloys and Compounds,2019年794:325-332 ISSN：0925-8388
通讯作者：
Zhou, Weiping;Tan, Weishi
作者机构：
[Wang, Xingyu; Zhou, Weiping; Ma, Chunlin] Nanjing Univ Sci & Technol, Sch Sci, Nanjing 210094, Jiangsu, Peoples R China.;[Zhai, Zhangyin; Ma, Chunlin] Huaiyin Normal Univ, Sch Phys & Elect Elect Engn, Huaian 223001, Peoples R China.;[Zhou, Weiping] Nanchang Univ, Sch Mat Sci & Engn, Nanchang 330031, Jiangxi, Peoples R China.;[Gan, Zhixing] Nanjing Normal Univ, Key Lab Optoelect Technol Jiangsu Prov, Sch Phys & Technol, Nanjing 210023, Jiangsu, Peoples R China.;[Tan, Weishi] Hunan City Univ, All Solid State Energy Storage Mat & Devices Key, Coll Informat & Elect Engn, Yiyang 413002, Peoples R China.
通讯机构：
[Zhou, Weiping] N;[Tan, Weishi] H;Nanjing Univ Sci & Technol, Sch Sci, Nanjing 210094, Jiangsu, Peoples R China.;Hunan City Univ, All Solid State Energy Storage Mat & Devices Key, Coll Informat & Elect Engn, Yiyang 413002, Peoples R China.
关键词：
Piezoelectric;Photoluminescence;Ferroelectric polarization;Electric field poling
摘要：
Luminescent piezoelectric materials promise a stratagem for controlling the optical process by electric field, which would benefit for future optoelectronic devices. Here, Er3+ doped (Ba0.85Ca0.15) (Zr0.1Ti0.9)O-3 (BCZT: Er3+) piezoelectric ceramics are prepared to demonstrate the proof of concept. In addition to excellent intrinsic piezoelectricity and ferroelectricity, BCZT: Er3+ ceramics exhibit simultaneously strong green upconversion emissions under excitation of 980 nm. Remarkable photoluminescence (PL) quenching phenomenon as well as significant changes on relative intensities of stark lines are observed under external poling electric field. Furthermore, field dependent piezoelectric constant d(33) and photoluminescence quenching ratio show similar variation trend and finally saturate for E > 3.5 kV/mm, which provides a noncontact strategy to monitor the piezoelectric constant d(33). The PL quenching triggered by electric field in BCZT: Er3+ ceramics is ascribed to the decreased asymmetry originating from field-induced structural transformation from a significant fraction of the tetragonal phase to rhombohedral phase. Our work would be helpful for expanding the scope of luminescent piezoelectric materials and promising future optoelectronic and optical devices with cross-coupled physical properties. (c) 2019 Elsevier B.V. All rights reserved.
作者：
Liu, H.;Zhang, Z. Z.;Wu, Y. J.;Dong, L. M.;Wang, H. O.;...
期刊：
Journal of Materials Science: Materials in Electronics,2019年30(20):18780-18787 ISSN：0957-4522
通讯作者：
Liu, H
作者机构：
[Liu, H.; Zhang, Z. Z.] Huaiyin Inst Technol, Fac Appl Technol, Huaian 223001, Peoples R China;[Wu, Y. J.] Fudan Univ, Inst Mol Mat & Devices, Dept Mat Sci, Shanghai 200438, Peoples R China;[Dong, L. M.] Changshu Inst Technol, Sch Automat Engn, Changshu 215500, Jiangsu, Peoples R China;[Wang, H. O.] Hangzhou Dianzi Univ, Inst Mat Phys, Hangzhou 310018, Zhejiang, Peoples R China;[Cao, M. X.] Peking Univ, Coll Chem & Mol Engn, Beijing 100871, Peoples R China
通讯机构：
[Liu, H.] H;Huaiyin Inst Technol, Fac Appl Technol, Huaian 223001, Peoples R China.
摘要：
A set of Ni doping Fe-Ga ribbons were fabricated using melt spinning method. The microstructure was studied using extended X-ray absorption fine structure spectroscopy (EXAFS), high resolution X-ray diffraction (HRXRD) and metallurgical microscope. The results of microstructure indicated that as Ni concentration increased, the lattice matrix transformed from body-centred cubic (bcc) to face-centred cubic (fcc), with the decrease of unit cell volume and the emergence of little amount B-2 and E2(1) phase. The result of magnetic and magnetostrictive properties showed that the saturation magnetization decreased with Ni doping. (110) texture in studied ribbons resulted in low saturation magnetic field and high saturation magnetostrction. In addition, small amount of precipitated phase E2(1) improved the magnetostricion of FeNiGa ribbons.
作者：
Wang, H. O.;Zhao, P.;Sun, J. J.;Tan, W. S.*;Su, K. P.;...
期刊：
Journal of Materials Science: Materials in Electronics,2018年29(15):13176-13179 ISSN：0957-4522
通讯作者：
Huo, D. X.;Tan, W. S.
作者机构：
[Wang, H. O.; Zhao, P.; Huang, S.; Huo, D. X.; Su, K. P.; Sun, J. J.] Hangzhou Dianzi Univ, Inst Mat Phys, Hangzhou 310018, Zhejiang, Peoples R China.;[Tan, W. S.] Hunan City Univ, Coll Informat & Elect Engn, All Solid State Energy Storage Mat & Devices Key, Yiyang 413002, Peoples R China.;[Tan, W. S.] Nanjing Univ Sci & Technol, Dept Appl Phys, Minist Educ, Key Lab Soft Chem & Funct Mat, Nanjing 210094, Jiangsu, Peoples R China.
通讯机构：
[Huo, D. X.; Tan, W. S.] H;[Tan, W. S.] N;Hangzhou Dianzi Univ, Inst Mat Phys, Hangzhou 310018, Zhejiang, Peoples R China.;Hunan City Univ, Coll Informat & Elect Engn, All Solid State Energy Storage Mat & Devices Key, Yiyang 413002, Peoples R China.;Nanjing Univ Sci & Technol, Dept Appl Phys, Minist Educ, Key Lab Soft Chem & Funct Mat, Nanjing 210094, Jiangsu, Peoples R China.
摘要：
[Pr0.7Sr0.3MnO3/La0.5Ca0.5MnO3]20 superlattices were epitaxially fabricated on (001) MgO substrates with 24 nm La0.5Ca0.5MnO3 (LCMO) buffer layer by pulsed laser deposition. As the thickness of Pr0.7Sr0.3MnO3 (PSMO) layer and LCMO layer is not identical, non-uniformity in the superlattice period thickness will occur and result in lower metal–insulator transition temperature and larger magnetoresistance (MR) at a wide low-temperature range. Furthermore, the percolation model was used to quantitatively understand the transport mechanism of superlattice. Our research results demonstrate that inhomogeneous layer thickness accompanied with charge ordering phase separation can strongly influence the transport properties of superlattice. Enhanced magnetoresistance at a wide temperature range provides possibilities for practical application in manganite-based film devices.
