Large-scale multiferroic complex oxide epitaxy with magnetically switched polarization enabled by solution processing     

Cong Liu  Feng An  Paria S M Gharavi  Qinwen Lu  Junkun Zha  Chao Chen  Liming Wang  Xiaozhi Zhan  Zedong Xu  Yuan Zhang  Ke Qu  Junxiang Yao  Yun Ou  Zhiming Zhao  Xiangli Zhong  Dongwen Zhang  Nagarajan Valanoor  Lang Chen  Tao Zhu  Deyang Chen  Xiaofang Zhai  Peng Gao  Tingting Jia  Shuhong Xie  Gaokuo Zhong  Jiangyu Li 《国家科学评论(英文版)》2020,7(1):84

Complex oxides with tunable structures have many fascinating properties, though high-quality complex oxide epitaxy with precisely controlled composition is still out of reach. Here we have successfully developed solution-based single-crystalline epitaxy for multiferroic (1-x)BiTi_(1-y)/2Fe_yMg_(1-y)/2O₃–(x)CaTiO₃ (BTFM–CTO) solid solution in large area, confirming its ferroelectricity at the atomic scale with strong spontaneous polarization. Careful compositional tuning leads to a bulk magnetization of 0.07 ± 0.035 μ_B/Fe at room temperature, enabling magnetically induced polarization switching exhibiting a large magnetoelectric coefficient of 2.7–3.0 × 10⁻⁷ s/m. This work demonstrates the great potential of solution processing in large-scale complex oxide epitaxy and establishes novel room-temperature magnetoelectric coupling in epitaxial BTFM–CTO film, making it possible to explore a much wider space of composition, phase, and structure that can be easily scaled up for industrial applications.  相似文献   

Research ethics: a safeguard for advanced technologies     

Hepeng Jia 《国家科学评论(英文版)》2020,7(11):1787

With the fast development of cutting-edge technologies and their greater integration into human life, more ethical challenges emerge. The problem became more salient when the world''s first genetically edited babies were born in China in violation of existing ethical rules. Although the responsible researcher He Jiankui was sentenced for imprisonment for three years last December, it is still necessary to examine the current status of research ethics and the challenges in China. Has China set up a sophisticated research ethics system? For research ethics and their implementation in China, are there unique national characteristics? Can the dominant ethics principles primarily developed from life science research be equally adopted in the emerging artificial intelligence research and development? At an online forum organized by National Science Review (NSR) and through subsequent correspondences among forum participants, NSR Executive Editor-in-Chief Mu-ming Poo and guest moderator Hepeng Jia asked three scientists and three bioethicists or philosophers of science and technology in the field to examine the dynamic development of research ethics in China. Weiwen DuanPhilosopher of Science and Technology at Chinese Academy of Social Sciences, Beijing, China Junjiu HuangLife scientist focused on genetics at Sun Yat-sen University, Guangzhou, China Renzong QiuBioethicist at Chinese Academy of Social Sciences, Beijing, China Qiang SunLife scientist and the principal investigator (PI) of clone monkey program at Shanghai Institute of Neuroscience, Chinese Academy of Sciences, Shanghai, China Yi ZengArtificial intelligence scientist at Institute of Automation, Chinese Academy of Sciences, Beijing, China Xiaomei ZhaiBioethicist at Chinese Academy of Medical Sciences/Peking Union Medical College, Beijing, China Mu-ming Poo (Chair)Neurobiologist at Center for Excellence in Brain Science and Intelligence Technology, Chinese Academy of Sciences, Shanghai, China Hepeng Jia (Co-chair)Professor of Science Communication at Soochow University, Suzhou, China  相似文献   

An overview of the use of plastic-film mulching in China to increase crop yield and water-use efficiency     

Dongbao Sun  Haigang Li  Enli Wang  Wenqing He  Weiping Hao  Changrong Yan  Yuzhong Li  Xurong Mei  Yanqing Zhang  Zhanxiang Sun  Zhikuan Jia  Huaiping Zhou  Tinglu Fan  Xucheng Zhang  Qin Liu  Fengju Wang  Chaochun Zhang  Jianbo Shen  Qingsuo Wang  Fusuo Zhang 《国家科学评论(英文版)》2020,7(10):1523

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Hierarchy in materials for maximized efficiency     

Li-Hua Chen  Yu Li  Bao-Lian Su 《国家科学评论(英文版)》2020,7(11):1626

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从同构的角度解读《多丽·咏白菊》许渊冲的译本     

贾婷婷 《长治学院学报》2013,(3)

同构作为一种衔接手段通常出现在各种文体中，辅助实现上下文语义的衔接与连贯。本文将通过同构关系来解读《多丽·咏白菊》这首词许渊冲老先生的译本。  相似文献   

浅谈教学过程中"责任心"对班主任工作的重要性     

陈全军 《佳木斯教育学院学报》2010,(5)

在教学工作中,作为教育工作者身肩更多的是无尽的责任,为了这份责任教育工作者就应该努力去做好班级工作,在教育工作中对班级的管理方面,本人在文中进行探讨,以供各住同行交流.  相似文献   

成人教育与学习参与障碍研究述评与展望     

陈国华 《职教通讯》2012,(22):42-46

通过整理近年来国内外的相关文献,对当前成人教育与学习参与障碍的研究成果进行系统的总结与归纳。重点对成人教育与学习参与障碍的内涵、情境障碍、机构障碍、心理障碍与信息障碍进行梳理,最后从成人教育与学习参与障碍未来本土化理论体系的建构与多元化研究方法的采用方面进行展望。  相似文献   

积极心理学在高校思想政治教育中的运用     

陈璇 《南昌教育学院学报》2013,(3):23+25

随着当今社会的迅速发展,大学生群体在各种文化、理念竞相迸发的时代难免会产生困惑,很多大学生深受拜金主义、享乐主义的影响,高校思想政治教育实施过程中也是困难重重。而积极心理学理论对于青少年的成长具有积极意义,积极心理治疗理论也是一种新生理论,它对于帮助青少年成长、拓宽青春期少年的心理辅导领域有着很大帮助。本文在对积极心理学及其治疗理论进行综述的基础上,尝试探讨其在高校思想政治教育方面的指导意义。  相似文献   

Effects of Ability Grouping on Student Achievement     

James A Kulikand  Chen‐Lin C. Kulik 《Equity & Excellence in Education》2013,46(1-2):22-30

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消防院校心理学课程质量评价体系的建构     

陈庆 《南昌教育学院学报》2013,(1):144-145

消防院校的心理学评价体系一定程度上阻碍了心理学教学质量的提高,探索与之相适应的课程评价体系亦是大势所趋。文章基于目前消防院校心理学课程评价体系存在的问题,从理论上初步建构与消防院校心理学课程相适应的评价体系。  相似文献