FERROELECTRICS
·
2016
·
IF 0.491
Sun Hai-Qin,Zhang Qi-Wei,Li Wen-Xin
The photoluminescence of Tb3+-doped (Bi0.5Na0.5)TiO3 (BNT) ferroelectric materials fabricated via the conventional solid-sate reaction method were studied. Under blue light excitation (487 nm), a bright green emission centered at 547 nm is observed at room temperature, originating from the 5D4→7F5 transition of Tb3+ ions. The emission intensity reached its maximum as the doping concentration is 0.02 mol and sintering temperature is 1080°C, respectively. The CIE chromaticity coordinate for x = 0.02 is (0.3222, 0.6711), located in the green light region. These results show that Tb3+-doped BNT materials may have potential applications in white light-emitting diodes and novel multifunctional devices.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
Nanoscale Horizons
·
2025
·Vol. 10
·期 3
·561-567
·
IF 6.6
Yu Xing,Haoshen Ye,Guowei Du,Xu Li,Le-Ping Miao,Junchao Zhang,Xiong Luo,Xiyu Chen,Haoran Ye,Aoli Shen,Zhicheng Wang,Yumeng You,Shuai Dong,Linglong Li
The coexistence of electric and magnetic orders with intrinsic coupling, referred to as magnetoelectric coupling in multiferroics, has been extensively studied in oxide materials but remains relatively unexplored in van der Waals materials. Among these, CuCrP2S6 (CCPS) is notable for its emergent antiferromagnetic (AFM) and antiferroelectric (AFE) characteristics. However, investigations into magnetoelectric coupling in CCPS are limited, and the effects of dopants on its magnetic properties have yet to be fully addressed. In this study, we synthesized CuCr1−xFexP2S6 (CCFPS) samples using the chemical vapor transport (CVT) method to investigate the influence of iron doping on the magnetic and nonlinear optical properties of the CCFPS system. Our results indicate that the AFM state is preserved, while the Néel temperature (TN) varies with the doping concentration. First-principles calculations were employed to assess the exchange interactions among magnetic atoms. Notably, for samples with doping concentrations x < 0.5, we observed both magnetic-dielectric coupling and second harmonic generation (SHG) effects. However, these effects were absent at higher doping levels. Furthermore, our analysis revealed a distinct odd–even dependence of SHG, suggesting the presence of interlayer symmetry-breaking coupling. These findings advance our understanding of two-dimensional (2D) multiferroic materials and lay the groundwork for designing and optimizing magnetoelectric coupling materials with enhanced performance.
研究领域:
凝聚态物理
·
材料科学
·
二维材料
·
多铁材料
·
自旋电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MATERIALS RESEARCH BULLETIN
·
2025
·
IF 5.7
Wenlong Liu,Jianbo Wang,Jiahua Wei,Di Li,Jin Zong,Qibin Yuan
In the field of multifunctional electronic components, multiferroic material which possesses both ferroelectricity and ferromagnetism has important application prospect. Here, the Bi 0.89 Tb 0.11 Fe 0.96 Mn 0.02 Co 0.02 O 3 /Zn 1-x Ni x Fe 2 O 4 (BTFMCO/ZN x FO) bilayer thin films ( x = 0.0, 0.1, 0.2, 0.3, 0.4) are fabricated by the sol-gel spin-coating technique. The influence of ZN x FO magnetic layer on the structural, dielectric, ferroelectric, and ferromagnetic properties of the bilayer thin films is systematically investigated. The BTFMCO/ZN 0.2 FO bilayer exhibits the lowest surface roughness (Ra=1.44 nm), a markedly reduced Fe 2+ concentration and minimized oxygen vacancy density, leading to a suppressed leakage current density of 3.7 × 10 –4 A/cm 2 at 200 kV/cm. Consequently, enhanced multiferroic properties with a ferroelectric remnant polarization (2P r ) of 118.5 µC/cm² and saturation magnetization (M s ) of 63.2 emu/cm³, respectively, are observed in the BTFMCO/ZN 0.2 FO sample. These findings reveal that interfacial modulation via Ni 2+ -doped ZN x FO layers is an effective strategy to simultaneously enhance ferroelectric and ferromagnetic performance.
研究领域:
材料科学
·
凝聚态物理
·
功能薄膜
·
多铁材料
·
磁电耦合
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2015
·Vol. 41
·期 4
·5498-5504
·
IF 2.605
Shizhou Pu,He Zheng,Zhenlian Chen,Meiya Li,Zhongqiang Hu,Jianbo Wang,Huamin Zou
The microstructures of Bi 0.85 Nd 0.15 FeO 3 ceramics were investigated by using transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM), selected area electron diffraction (SAED), convergent-beam electron diffraction (CBED) and X-ray energy dispersive spectrometry (EDS). The superstructure phase related to 1/4( hh 0) p and 1/4(00 l ) p diffraction spots were observed in the samples. It is found that the superstructure phase can co-exist with R 3 c phase in a single grain. The bright and dark field images accompanied with SAED patterns provided evidences of the superstructure phase dispersed into the matrix with R3c symmetry and evolution of the domain. The ferroelectric domain wall was observed according to the displacement of Fe 3+ ions respect to Bi 3+ sub-lattice in the ferroelectric R 3 c phase based on HRTEM observations. The space group Pnam of the superstructure was identified by combining SAED and CBED techniques . EDS measurement revealed that the concentration of Nd in the Pnam phase is higher than that in R 3 c phase. This might mean that the transition from R 3 c to Pnam structure is due to the inhomogeneous distribution of the Nd concentration and the weakened stereochemical activity of Bi 3+ lone electron pair, arisen from the increase in Nd content.
研究领域:
材料科学
·
凝聚态物理
·
功能陶瓷
·
电子显微学
·
铁电材料
·
多铁材料
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2021
·
IF 5.165
Jiahua Min,Shuhan Zheng,Jingwen Gong,Xiyu Chen,Fei Liu,Yunlong Xie,Yongjun Zhang,Zhen Ma,Meifeng Liu,Xiuzhang Wang,Hong Li,Jun-Ming Liu
Searching for novel magnetoelectric (ME) materials has been one of the major issues of multiferroics. In this work, we present a systematic research study on garnet Mn3Al2Ge3O12, including structural, magnetic, heat capacity, and ME characterizations. Below the Néel temperature TN ∼ 6.8 K, Mn2+ spins form a long-range antiferromagnetic order, and a magnetic field H-driven electric polarization P is identified simultaneously. The relationship between P and H is nonlinear under low H and becomes linear under high H. Such transition is believed to originate from the H-induced variation of the magnetic structure. In addition, the P reaches 0.6 μC/m2 under μ0H = 9 T, corresponding to an ME coupling coefficient of αME ∼ 0.08 ps/m under high H. The small αME is attributed to the weak spin–orbit coupling and weak magnetic interactions in Mn3Al2Ge3O12. Furthermore, we realize the stable control of P by periodically varying H, which is crucial for potential application. We provide a rare case that a garnet material shows a first-order ME effect.
研究领域:
凝聚态物理
·
多铁材料
·
磁电材料
·
材料科学
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2018
·Vol. 29
·期 7
·5566-5572
·
IF 2.324
Wang Ting,Song S. -H.
Sr–Zr co-doped multiferroic BiFeO 3 powders are synthesized using sol–gel technique. The effect of Sr–Zr co-doping on the structural, magnetic and optical properties is investigated. X-ray diffraction demonstrates that the crystal structure transforms and there is no impurity phases present even in a high doping concentration. Scanning electron microscopy and transmission electron microscopy indicate that the Sr–Zr co-doping leads to a decrease in particle size with the Bi 0.80 Sr 0.20 Fe 0.95 Zr 0.05 sample having a particle size of 20–50 nm. With the Sr–Zr co-doping, the nanopowders change to be soft ferromagnetic from antiferromagnetic. The room-temperature remnant magnetization is enhanced by the co-doping, from 0.015 emu/g for the pure BiFeO 3 to 0.237 emu/g for the Bi 0.80 Sr 0.20 Fe 0.95 Zr 0.05 sample. The optical band gap shows an increasing trend with co-doping.
研究领域:
材料科学
·
凝聚态物理
·
纳米材料
·
功能材料
·
多铁材料
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2018
·Vol. 29
·期 3
·1806399
·
IF 13.325
Jing Chen,Bin Xu,Xiao Qiang Liu,Ting Ting Gao,Laurent Bellaiche,Xiang Ming Chen
BiFeO 3 is recognized as the most important room temperature single phase multiferroic material. However, the weak magnetoelectric (ME) coupling remains as a key issue, which obstructs its applications. Since the magnetoelectric coupling in BiFeO 3 is essentially hindered by the cycloidal spin structure, here efforts to improve the magnetoelectric coupling by destroying the cycloidal state and switching to the weak ferromagnetic state through symmetry modulation are reported. The structure is tuned from polar R3c to polar Pna2 1 , and finally to nonpolar Pbnm by forming Bi 1- x Nd x FeO 3 solid solutions, where two morphotropic phase boundaries (MPBs) are detected. Greatly enhanced ferroelectric polarization is obtained together with the desired weak ferromagnetic characteristics in Bi 1- x Nd x FeO 3 ceramics at the compositions near MPBs. The change of magnetic state from antiferromagnetic (cycloidal state) to ferromagnetic (canted antiferromagnetic) is confirmed by the observation of magnetic domains using magnetic force microscopy. More interestingly, combining experiments and first-principles-based simulations, an electric field-induced structural and magnetic transition from Pna2 1 back to R3c is demonstrated, providing a great opportunity for electric field-controlled magnetism, and this transition is shown to be reversible with additional thermal treatment.
研究领域:
材料科学
·
多铁材料
·
凝聚态物理
·
铁电学
·
磁电学
·
固体化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）