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国家自然科学基金(11234005)

作品数:5 被引量:25H指数:2
相关作者:刘俊明南策文更多>>
相关机构:清华大学南京大学更多>>
发文基金:国家自然科学基金国家重点基础研究发展计划更多>>
相关领域:理学一般工业技术电气工程更多>>

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5 条 记 录,以下是 1-5
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Strain-induced modulation of magnetic anisotropy in Co/BaTiO_3 composite被引量:1
2014年
A uniaxial magnetic anisotropy Co film was grown on a single-crystal Ba Ti O3(BTO) substrate. The strain yielded by the voltage-induced ferroelastic domain switching in the BTO substrate was recorded by atomic force microscope and modulated the magnetism of the Co film. The manipulation of the magnetism of the Co film is experimentally demonstrated by voltage dependence of magnetic hysteresis loops measured via magneto-optic Kerr effect.
Li ShuYa GaoCewen Nan
关键词:磁各向异性钛酸钡电压依赖性原子力显微镜磁光克尔效应
多铁性十年回眸被引量:22
2014年
多铁性研究可上溯至1950年代,作为凝聚态与材料物理的一个研究方向也算历史悠久;但大规模研究则主要受2003年两项里程碑性成果驱动,距今正好十年。所谓"十年树木",古训赋予我们回眸十年多铁研究的一个理由。这两项成果之一是BiFeO3外延薄膜制备及磁电耦合观测,主要贡献在于将互无交叠的磁电耦合唯象理论与多铁性微观物理框架通过铁性畴层次有机结合,触发多铁性薄膜与异质结的广泛研究。另一项成果是发现TbMnO3中巨大的磁电耦合效应,开启探索一大类具有崭新物理内涵的多铁性物质之路。对多铁性薄膜异质结的研究深入细致,体现了层层盘剥、细嚼慢咽的风格。而单相多铁性的探索则百花齐放、只争朝夕。前者如能工巧匠,其足迹是精湛研究技术方法与物理理论相结合的图画。后者如春潮奔腾,所到之处气象万千,其大观是科学发现与新材料探索的范例。文章基于粗略框架,对多铁性研究十年图景粗作描绘。有关多铁性各方面的详细论述则见诸本专题之隽文秀语。多铁性研究经历分而春秋的黄金十年,正出现久分必合的迹象,令人不忍释手。
刘俊明南策文
关键词:多铁性
Dynamic resistive switching in a three-terminal device based on phase separated manganites
2015年
A three-terminal device based on electronic phase separated manganites is suggested to produce high performance resistive switching. Our Monte Carlo simulations reveal that the conductive filaments can be formed/annihilated by reshaping the ferromagnetic metal phase domains with two cross-oriented switching voltages. Besides, by controlling the high resistance state(HRS) to a stable state that just after the filament is ruptured, the resistive switching remains stable and reversible, while the switching voltage and the switching time can be greatly reduced.
王志强颜志波秦明辉高兴森刘俊明
Voltage-controlled Kerr response in Ni/Pb(Zr_(0.52)Ti_(0.48))O_3 heterostructures被引量:2
2014年
Voltage-modified magneto-optical Kerr effect(MOKE) is widely used to describe the converse magnetoelectric(ME) effect in the ferroelectric/ferromagnetic(FE/FM) heterostructures. However, the applied voltage can possibly give rise to electro-optical effect of the FE layer, which would also affect the Kerr signals in the MOKE system. Here, we used an AC voltage to modulate the magnetization in the Ni/Pb(Zr0.52Ti0.48)O3(PZT) heterostructures with different pre-polarization states of the PZT layers to investigate the complexity of the Kerr signals. The results suggested that the voltage control of Kerr signal contained several origins; however, the straininduced ME effect dominated in the ME effect in the heterostructures.
Ya GaoZheng LiLi ShuJing MaCewen Nan
关键词:O3磁光克尔效应电压调节二氧化锆
Unusual tunability of multiferroicity in GdMn_2O_5 by electric field poling far above multiferroic ordering point被引量:1
2019年
The multiferroicity in the RMn_2O_5 family remains unclear, and less attention has been paid to its dependence on high-temperature(high-T) polarized configuration. Moreover, no consensus on the high-T space group symmetry has been reached so far. In view of this consideration, one may argue that the multiferroicity of RMn_2O_5 in the low-T range depends on the poling sequence starting far above the multiferroic ordering temperature. In this work, we investigate in detail the variation of magnetically induced electric polarization in GdMn_2O_5 and its dependence on electric field poling routine in the high-T range. It is revealed that the multiferroicity does exhibit qualitatively different behaviors if the high-T poling routine changes, indicating the close correlation with the possible high-T polarized state. These emergent phenomena may be qualitatively explained by the co-existence of two low-T polarization components, a scenario that was proposed earlier.One is the component associated with the Mn^(3+)–Mn^(4+)–Mn^(3+) exchange striction that seems to be tightly clamped by the high-T polarized state, and the other is the component associated with the Gd Mn^(3+)–Mn^(4+)–Mn^(3+) exchange striction that is free of the clamping. The present findings may offer a different scheme for the electric control of the multiferroicity in RMn_2O_5.
Xiang LiShuhan ZhengLiman TianRui ShiMeifeng LiuYunlong XieLun YangNian ZhaoLin LinZhibo YanXiuzhang WangJunming Liu
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