Crystals
·
2023
·Vol. 13
·期 7
·1140
·
IF 2.7
Jiuyuan Han,Mengjiao Chi,Liu Yang,Bing Liu,Minmin Mao,Hadi Barzegar Bafrooei,Zhongyan Ma,Yingjie Ren,Feng Shi,Ehsan Taheri-Nassaj,Dawei Wang,Kaixin Song
In this study, dense composites of xNaCl-(1−x)Ni0.5Zn0.5Fe2O4(referred to as NaCl-NZO) and xH3BO3-(0.8−x)Ni0.5Zn0.5Fe2O4-0.2NaCl (referred to as HB-NZO-NaCl) were prepared using the cold sintering process. The objective was to investigate the cold sintering procedure for fabricating ferrite composite ceramics with comparable permeability and dielectric constants suitable for radio-frequency electronic device applications. Optimal cold sintering conditions were determined as 200 °C/30 min/500 MPa with a relative density of 95% for NaCl-NZO and 120 °C/30 min/300 MPa with a relative density of 95.4% for HB-NZO-NaCl. X-ray diffraction and scanning electron microscope analyses confirmed the absence of secondary phases. The resulting composite ceramics showed promising characteristics, with the 0.5NaCl-0.5NZO composition exhibiting a dielectric constant of 6.2 @ 100 MHz, dielectric loss of 0.02 @ 100 MHz, permeability of 2.5 @ 100 MHz, and magnetic loss of 0.001 @ 100 MHz. Similarly, the 0.3HB-0.5NZO-0.2NaCl composition displayed a dielectric constant of 5.9 @ 100 MHz, dielectric loss of 0.02 @ 100 MHz, permeability of 5.1 @ 100 MHz, and magnetic loss of 5 × 10−4@ 100 MHz. These findings indicate potential applications in wireless communication.Keywords:cold sintering;magnetic–dielectric materials;ferrite;dielectric constant
研究领域:
材料科学
·
电子工程
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·Vol. 47
·期 24
·34028-34033
·
IF 4.527
Yuanmiao Xie,Fei Guo,Hongda Li,Boran Tao,Haixin Chang
We have firstly studied the poling magnetic field dependence of magnetoelectric (ME) coupling in a honeycomb antiferromagnet Co 4 Nb 2 O 9 , and found that the ME susceptibilities do not increase monotonously with increasing the poling magnetic field strength ( H Pole ) as the usual case, but reach maxima around 10 kGs. This phenomenon results from opposite H Pole dependences of domain wall thickness and energitically preferred domain's proportion. More interestingly, if the sample returns to paramagnetic phase after being poled and then reenters antiferromagnetic phase without being poled, ME coupling still exists. This memory effect is attributed to the presence of ME domain nucleation centers in paramagnetic phase.
研究领域:
凝聚态物理
·
多铁性材料
·
磁电材料
✓ 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 ALLOYS AND COMPOUNDS
·
2022
·
IF 6.371
Y.M. Xie,C.C. Wang
Memory effect of magnetoelectric (ME) coupling is observed in antiferromagnetic Co 4 Ta 2 O 9 ME poling generated polarization below Néel temperature is retrieved after Co 4 Ta 2 O 9 is warmed to paramagnetic phase and then cooled to antiferromagnetic phase without being poled. This effect is ascribed to polar nanoregions in paramagnetic phase due to short range magnetic ordering as evidenced by temperature dependent magnetic entropy. If the applied magnetic field in paramagnetic phase is weakened, the memory effect is strengthened, which is ascribed to the less change of spin alignment induced by the weaker magnetic field. If we switch this magnetic field, the polarization when reentering polar phase is also reversed. Furthermore, the memory effect is also reflected in electric field dependent magnetization after the second cooling process without being poled.
研究领域:
凝聚态物理
·
多铁性材料
·
磁电材料
·
强关联电子系统
·
功能材料
✓ 已验证
DOI
高影响因子
Materials Today Communications
·
2024
·
IF 3.7
Min Shi,Shushu Du,Wu Chen,Hao Chen,Yudong Xu,Ruzhong Zuo,Tiancheng Bai
The films of Bi 0.5 Na 0.5 Ti 1-x Fe x O 3-δ and NiFe 2-x Nd x O 4 were deposited via spin-coating method. The results indicate that the film of Bi 0.5 Na 0.5 Ti 0.98 Fe 0.02 O 3-δ possesses good ferroelectric performance with remnant polarization as high as 25.2 µC·cm −2 and the film of NiFe 1.98 Nd 0.02 O 4 possesses a maximal saturation magnetization (282.4 emu·cm −3 ). The composite films of Bi 0.5 Na 0.5 Ti 0.98 Fe 0.02 O 3-δ -NiFe 1.98 Nd 0.02 O 4 with different deposition sequences were also prepared. In contrast to single-phase films, magnetoelectric composite films exhibit smaller remnant polarization and saturation magnetization. The film of NiFe 1.98 Nd 0.02 O 4 /Bi 0.5 Na 0.5 Ti 0.98 Fe 0.02 O 3-δ (NB) possesses greater values of remnant polarization, saturation magnetization and magnetoelectric coupling coefficient than those for the composite film of Bi 0.5 Na 0.5 Ti 0.98 Fe 0.02 O 3-δ /NiFe 1.98 Nd 0.02 O 4 (BN). The composite film of BN exhibits greater magnetoelectric coupling coefficients as high as 169.7 mV·cm −1 ·Oe −1 .
研究领域:
材料科学
·
多铁性材料
·
薄膜技术
·
功能材料
·
磁电材料
✓ 已验证
DOI
高影响因子
COMPOSITES SCIENCE AND TECHNOLOGY
·
2018
·
IF 5.16
Yan Wang,Guizheng Guo,Yaya Zhou,Youyi Sun,Diansen Li,Yaqing Liu,Guizhe Zhao
Generally, magnetostriction elastomer were based on magnetic field-induced strains of elastomer matrix, resulting from the rotation of magnetic particle in elastomer matrix. However, such magnetostriction was relatively small and large hysteresis. Here, a new class magnetic rubber foam with cellular structure was developed and synthesized by the one-step solution foam processing. The magnetic rubber foam did not only show larger magnetostriction value of ca.11.0% comparing to previous magnetostriction elastomer, but also was few remanent magnetostriction and rapid response (ca. 1.0s). Furthermore, a new mechanism of magnetostriction was proposed for explaining the high performance magnetostriction. These provide a universal route for the rational design of magnetostriction materials with high performance for various applications.
研究领域:
材料科学
·
高分子科学
·
智能材料
·
磁电材料
✓ 已验证
DOI
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2017
·Vol. 101
·期 6
·2347-2352
·
IF 2.841
Yuanmiao Xie,Hao Zang,Wen-Dan Ceng,Shuting Wang,Chunchang Wang
Pyrocurrent and dielectric properties of magnetoelectric antiferromagnet Co 4 Nb 2 O 9 have been investigated. The sample shows 2 thermally activated dielectric relaxations in the temperature range far above Néel temperature with the low- and high-temperature ones being a dipolar and Maxwell-Wagner relaxations, respectively. Two types of dipoles: relaxing dipoles and magnetic-field-induced dipoles were found in the sample. An internal electric field is formed due to the ordering of relaxing dipoles. Three current peaks were observed. The 2 higher temperature current peaks correspond to the dielectric relaxations. The lowest temperature current peak contains a positive tip and negative dip. The tip and dip are related to the depolarization of ferroelectricity induced by external and internal fields, respectively.
研究领域:
凝聚态物理
·
多铁性材料
·
电介质与驻极体
·
磁电材料
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）