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   

历年教育学学科全国优秀博士学位论文产出分析   总被引：3，自引：0，他引：3  

YAO Yun  ZHOU Xue-jun 《高等教育研究》2007,28(11):66-73

分析历年教育学学科全国优秀博士学位论文NEDD(National Excellent Doctoral Dissertations)的产出特点,将对提高博士生培养质量起到引导和示范作用。本文采用文献法和访谈法,对1999-2007年教育学学科NEDD的获得数量在所有学科、哲学社会科学以及教育学科中的分布,NEDD的获得与培养机构、重点学科以及导师知名度等的相关性进行了分析,发现教育学学科NEDD评选的竞争性将进一步加剧。  相似文献   

铝基复合材料烧结试验中试样制备及试验方法研究     

林芸  柴东朗  张文兴 《贵阳学院学报(自然科学版)》2007,2(1):37-41

铝基复合材料烧结试验所用试样的制备方法采用常用的粉末冶金法,它的制备方法包括粉末预处理,配料,混料,冷压成形,制样等.但每一个工序都与传统的粉末冶金法有所不同,具有其独特性.原位观察法进行烧结试验也为课题组独创.这些研究为铝基复合材料烧结工艺研究提供了试验依据.  相似文献   

把见闻转化为阅历:蒋百里的家庭教育经验     

李云  丁道勇 《中华家教》2021,(1):72-77

蒋百里是民国时期著名军事学家,他本人的成长经历和教育子女的方法在当时即被传为佳话.蒋百里终生秉承"有知识的人才配谈经验,肯研究的人才配谈阅历"的理念,并以此来教育五个女儿.他的经验告诉我们,在家庭教育中要创造条件让孩子获得丰富的见闻,更重要的是教导孩子付出努力把见闻与知识结合起来,把见闻转化为阅历.  相似文献   

模拟与变形——圣经故事与徐小斌小说     

罗韵 《职大学报》2016,(4):23-27,51

徐小斌小说从圣经故事中汲取了艺术营养,其文本通过对"该隐杀弟"、"失乐园"等圣经情节的模拟与变形来书写她的个人意识与女性情怀,使其小说在与圣经遥相照应的同时又别有深意。  相似文献   

Soeng Joeng Toi: opening fissures towards a platform and a bridge     

Yun Guo  Xiaotian Li 《Inter-Asia Cultural Studies》2018,19(3):494-504

ABSTRACT

In May of 2017, a space called Soeng Joeng Toi was established, gathering a variety of people to share and co-organise a space together. While it may be considered a relative newcomer, Soeng Joeng Toi’s appearance can be seen as an inevitable breakaway from the mainstream political, economic and cultural climate of a city like Guangzhou. From its initial planning stages to its official operation, much of Soeng Joeng Toi’s inspiration and methods have come from extensive exchange with independent spaces both in China and abroad, where mutual recognition of similar conditions and thinking of the commons have led these different spaces to continue developing in a sustained dialogue. This text, written from the perspective of two of Soeng Joeng Toi’s “co-proprietors,” introduces the beginnings of Soeng Joeng Toi, its current operations and experiences of connecting with others as well as explores the possibilities of a shared activism involving people from different fields and geographic regions.  相似文献   

Guazia,the earliest ovule without cupule but with unique integumentary lobes     

De-Ming Wang  Le Liu  Yi Zhou  Min Qin  Mei-Cen Meng  Yun Guo  Jin-Zhuang Xue 《国家科学评论(英文版)》2022,9(4)

The earliest ovules in the Late Devonian (Famennian) are surrounded by a cupule that is involved in both protection and pollination, and generally have free integumentary lobes. Here we report a new taxon from the Famennian of China, Guazia dongzhiensis gen. et sp. nov. The terminally borne ovule is apparently acupulate (without cupule) and has four radially arranged wing-like integumentary lobes that are extensively fused, and folded lengthwise and inwards. Guazia provides evidence that not all Devonian seeds possess a cupule and it increases their diversity in integumentary lobes. This genus also suggests that the integuments develop new functions, probably including wind dispersal at the expense of the cupules.  相似文献   

高等教育复归现象解读——兼论大学的适应与调节机制     

薄云  孙士宏 《大学教育科学》2006,5(5):25-28

在高等教育的发展历史进程中,很多曾被否定的教育理念或者教育实践,在经历了很长一段时间的沉寂后,又重新得到认可和重视,如高等教育国际化、人文主义、自由教育向通识教育转化、市场力量的增强、学术自由等。通过分析这些现象,我们可以发现,大学之所以能够存在和发展,最主要的原因在于其不断地适应社会和进行自我调节。  相似文献   

农村电子商务联盟资源体的构建——以广东省清远市为例     

王晓晴  王云 《清远职业技术学院学报》2020,(1):27-32

珠三角地区的经济、社会发展的集聚效应像一个巨大的吸盘,吸走了粤东西北地区的人力资本。清远农业生产经营青年人才缺乏,成为发展农村电子商务的制约瓶颈。既然人才不可能短时间回流,应充分利用省职教基地的高校人力资本,通过在基地建立农村电子商务发展中心的形式,以高校智库资源为引领,凝聚科研院所、农业生产流通社会组织和规模龙头企业等形成发展联盟资源体,推进清远农村电子商务实现跨越式发展。  相似文献   

基于SRPE竞速运动项目训练负荷评价方法的实证研究     

谢云  耿海峰  李赞 《中国体育科技》2020,(2):30-38

目的:基于自行车运动员的训练负荷实证评价,探讨竞速运动项目训练负荷主观感知疲劳评价(session rating of perceived exertion,SRPE)的有效性,并证明训练因素[心率(HR)、训练压力分数(TSS)、训练刺激量(TRIMP)、代谢当量(MET)、能量消耗(EE)]与非训练因素(自感疲劳、压力等级、睡眠质量、肌肉酸痛、训练积极性)对训练负荷量(SRPETL)的影响作用。方法:10名优秀职业自行车运动员(均为男性),测试开始前1周均未进行过大强度运动。运用SRPE、心率计(Garmin佳明HRM-tri)、码表(Garmin佳明edge 200)、身心恢复测试量表等对42天的高原训练负荷进行测试。内部负荷采用SRPE-TL、ETRIMP、ETRIMP、%HRmax表示,外部负荷采用TSS、MET、EE表示。结果:平均每周的SRPE-TL为5 300±1 512 AU。训练单调性(TM)为2.22±0.81 AU,训练应激(TS)为12 766±1 334 AU。SRPE-TL与各测试指标之间具有显著相关性(r=0.58~0.81)。逐步多元回归分析结果表明ETRIMP、TSS、自感疲劳、肌肉酸痛和压力等级可以解释SRPE-TL 71.8%的变异程度(Y=453.12+2.99 ETRIMP+1.20 TSS-114.81自感疲劳-111.30肌肉酸痛+85.81压力等级)。结论:SRPE是评价竞速项目训练负荷的一种有效手段,并且SRPETL是一个全域性指标,且训练因素与非训练因素均对运动员感知疲劳有影响作用。  相似文献