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Vector analysis of electric-field-induced antiparallel magnetic domain evolution in ferromagnetic/ferroelectric heterostructures

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Journal of Advanced Ceramics 2021年第6期10卷 1273-1281页

作者： xinger zhao Zhongqiang HU Jingen WU Ting FANG Yaojin LI Yuxin CHENG Yifan zhao Mengmeng GUAN Dan XIAN Chenying WANG Qi MAO Bin PENG Ren-Ci PENG Ziyao ZHOU Zhiguang WANG Zhuang-De JIANG Ming LIU Electronic Materials Research Laboratory Key Laboratory of the Ministry of Education&International Center for Dielectric ResearchSchool of Electronic Science and EngineeringState Key Laboratory for Mechanical Behavior of MaterialsXi’an Jiaotong UniversityXi’an 710049China Collaborative Innovation Center of High-End Manufacturing Equipment Xi'an Jiaotong UniversityXi’an 710049China International Joint Laboratory for Micro/Nano Manufacturing and Measurement Technology Xi’an Jiaotong UniversityXi’an 710049China

Electric field(E-field)control of magnetism based on magnetoelectric coupling is one of the promising approaches for manipulating the magnetization with low power *** evolution of magnetic domains under in-situ E-fields is significant for the practical applications in integrated micro/nano ***,we report the vector analysis of the E-field-driven antiparallel magnetic domain evolution in FeCoSiB/PMN-PT(011)multiferroic heterostructures via in-situ quantitative magneto-optical Kerr *** is demonstrated that the magnetic domains can be switched to both the 0°and 180°easy directions at the same time by E-fields,resulting in antiparallel magnetization distribution in ferromagnetic/ferroelectric *** antiparallel magnetic domain evolution is attributed to energy minimization with the uniaxial strains by E-fields which can induce the rotation of domains no more than 90°.Moreover,domains can be driven along only one or both easy axis directions by reasonably selecting the initial magnetic domain *** vector analysis of magnetic domain evolution can provide visual insights into the strain-mediated magnetoelectric effect,and promote the fundamental understanding of electrical regulation of magnetism.

关键词： multiferroics magnetoelectric effect magnetic domains magneto-optical Kerr effect(MOICE)

Unconventional piezoelectric coefficients in perovskite piezoelectric ceramics

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Journal of Materiomics 2021年第2期7卷 254-263页

作者： Jingen Wu Zhongqiang Hu Xiangyu Gao Miaomiao Cheng xinger zhao Wei Su Liqian Wang Mengmeng Guan Yongjun Du Ruohao Mao Zhiguang Wang Ziyao Zhou Shuxiang Dong Ming Liu Electronic Materials Research Laboratory Key Laboratory of the Ministry of Education&International Center for Dielectric ResearchSchool of Electronic Science and EngineeringState Key Laboratory for Mechanical Behavior of MaterialsXi’an Jiaotong UniversityXi’an710049China Department of Materials Science and Engineering College of EngineeringPeking UniversityBeijing100871China

Piezoelectric ceramics exhibit three conventional piezoelectric coefficients,i.e.,d33,d31,d15,due to their∞mm crystal *** piezoelectric coefficients,such as d11,d12,d13,d14,d16,etc.,can only be extracted from piezoelectric single crystals of special symmetry with specific cut *** we demonstrate a rotated poling method to realize unconventional piezoelectric coefficients in perovskite piezoelectric *** method is elaborated in theory and experimentally proven to be *** nonzero piezoelectric coefficients in the 36 piezoelectric coefficients matrix can be obtained by combining these“quasi(effective)piezoelectric coefficients”with the conventional piezoelectric coefficients,which would expand applications in a wide variety of piezoelectric devices.

关键词： Quasi piezoelectric coefficients Diversity of piezoelectric devices Perovskite structure

Vector imaging of electric field-induced reversible magnetization reversal in exchange-biased multiferroic heterostructures

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Science China Materials 2022年第1期65卷 186-192页

作者： xinger zhao Zhongqiang Hu Ting Fang Yuxin Cheng Keqing Shi Yi-Xin Weng Yongjun Du Jingen Wu Mengmeng Guan Zhiguang Wang Ziyao Zhou Ming Liu Jing-Ye Pan Electronic Materials Research Laboratory Key Laboratory of the Ministry of Education&International Center for Dielectric ResearchSchool of Electronic Science and EngineeringState Key Laboratory for Mechanical Behavior of MaterialsXi’an Jiaotong UniversityXi’an 710049China Translational Medicine Laboratory the First Affiliated Hospital of Wenzhou Medical UniversityWenzhou 325000China Key Laboratory of Intelligent Critical Care and Life Support Research of Zhejiang Province Department of Intensive Carethe First Affiliated Hospital of Wenzhou Medical UniversityWenzhou 325000China

Exchange bias between ferromagnetic and antiferromagnetic layers has been widely utilized in spintronic *** the exchange bias in magnetic multilayers by an electric field(E-field)has been proposed as a low-power solution for manipulating the macroscopic properties such as exchange bias fields and magnetization values,while how the magnetic domains respond to the E-fields has rarely been reported in an exchange-biased ***,we realize the vector imaging of reversible electrical modulation of magnetization reversal in exchange-biased CoFeB/IrMn/PMN-PT(011)multiferroic heterostructures,utilizing in-situ quantitative magneto-optical Kerr effect(MOKE)*** the electrical control,magnetic domains at-80 Oe rotate reversibly between around 160°and 80°-120°,whose transverse components reverse from 225°to 45°***,pixel-by-pixel comparisons are conducted to further imply the reversible magnetization reversal by ***-induced reversible magnetization reversal is also demonstrated without applying external magnetic *** imaging of electrical manipulation of exchange bias is of great significance in understanding the magnetoelectric effect and the development of next-generation spintronic devices.

关键词： exchange bias magnetic domains multiferroics magnetization reversal

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夹层玻璃PVE中间膜热流变行为及松弛特性

中南大学学报（自然科学版） 2022年第11期53卷 4523-4533页

作者：谢东东杨健王星尔赵宸君上海交通大学船舶海洋与建筑工程学院上海200240 上海交通大学船舶海洋与建筑工程学院上海市公共建筑和基础设施数字化运维重点实验室上海200240

通过动态机械热力学试验和蠕变试验对改性EVA膜材(PVE~?)的热流变行为以及松弛特性进行研究,明确该膜材力学性能的温度和时间相关性。研究结果表明:PVE膜材是一种交联的半结晶高聚物,玻璃转化温度区间为-35~-15℃,结晶熔融温度区间为35... 详细信息

通过动态机械热力学试验和蠕变试验对改性EVA膜材(PVE~?)的热流变行为以及松弛特性进行研究,明确该膜材力学性能的温度和时间相关性。研究结果表明:PVE膜材是一种交联的半结晶高聚物,玻璃转化温度区间为-35~-15℃,结晶熔融温度区间为35~65℃,且其一定程度上服从简单热流变行为规律。温度和应力水平的提高均会提高PVE膜材的初始应变和蠕变速率。在0.5 MPa应力水平下,温度从-40℃升高至80℃,100 min时的蠕变应变约提高了2 340倍。在40℃温度条件下,应力水平从0.5 MPa提高至1.0 MPa,100 min时的蠕变应变约提高了3.17倍。广义Maxwell模型和广义Kelvin-Voigt模型分别被用于描述PVE膜材的黏弹性行为和蠕变特性。

关键词：乙烯-乙酸乙烯酯夹层玻璃动态机械热力学玻璃转化蠕变

基于国内外标准的结构用玻璃构件承载性能设计对比

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建筑结构学报 2022年第3期43卷 212-222页

作者：赵宸君杨健王星尔黄小坤刘强上海交通大学船舶海洋与建筑工程学院上海200240 上海市公共建筑和基础设施数字化运维重点实验室上海200240 中国建筑科学研究院有限公司北京100013

目前,各国结构用玻璃设计标准相对其他传统建筑材料仍欠成熟,且其中关于玻璃构件承载性能的设计方法也存在较大的差异。为此,对比分析了我国与美、澳、英、欧等国家和地区结构用玻璃设计标准在适用范围、设计理论以及构件承载性能设计... 详细信息

目前,各国结构用玻璃设计标准相对其他传统建筑材料仍欠成熟,且其中关于玻璃构件承载性能的设计方法也存在较大的差异。为此,对比分析了我国与美、澳、英、欧等国家和地区结构用玻璃设计标准在适用范围、设计理论以及构件承载性能设计模型的异同。结果表明:JGJ 113—2015《建筑玻璃应用技术规程》中对结构用玻璃设计标准的适用范围和设计理论有待进一步扩大和完善;对夹层玻璃的有效厚度计算偏于保守;对玻璃的鲁棒性设计模型缺失问题亟待解决。此外,针对结构用玻璃的特性和需求,对设计标准中应进一步考虑的问题提出了建议,包括玻璃构件连接节点的应力集中、环境荷载耦合劣化以及玻璃结构在极端荷载作用下的安全等。

关键词：结构用玻璃设计标准设计方法承载性能标准制定夹层玻璃鲁棒性

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血满草叶绿体基因组结构与特征分析

种子 2023年第4期42卷 1-9页

作者：李幸儿赵艳李雪任玉玲李萍青海大学生态环境工程学院西宁810016

为研究血满草叶绿体基因组结构与特征,以血满草新鲜叶片为材料,提取叶绿体DNA,对叶绿体基因组进行测序、组装,并对其大小、结构、基因组成、简单重复序列(SSR)位点、密码子偏好性以及系统发育进行分析。结果表明,血满草叶绿体基因组长度... 详细信息

为研究血满草叶绿体基因组结构与特征,以血满草新鲜叶片为材料,提取叶绿体DNA,对叶绿体基因组进行测序、组装,并对其大小、结构、基因组成、简单重复序列(SSR)位点、密码子偏好性以及系统发育进行分析。结果表明,血满草叶绿体基因组长度为158 610 bp,包括大单拷贝区(LSC, 87 345 bp),小单拷贝区(SSC, 18 937 bp)以及两个反向重复序列(IRa和IRb, 26 164 bp),总G+C含量为37.61%;血满草叶绿体基因组共编码到131个基因,包括86个蛋白编码基因,37个转运RNA基因,8个核糖体RNA基因。序列鉴定共发现6种类型的SSR,包括4种单核苷酸、2种二核苷酸;17个基因包含1个或2个内含子,其中11个位于蛋白质编码基因中,6个位于tRNA基因中;86个蛋白编码基因包含80 364 bp,编码26 788个密码子;系统发育分析显示,血满草与接骨木有较近的亲缘关系。

关键词：血满草叶绿体基因组 SSR位点密码子偏好性

运动通过提高OGT依赖的O-GlcNAcylation促进骨生成

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生命的化学 2024年第11期44卷 2152-2159页

作者：赵青夏燕谢幸尔南通大学附属南通第三医院南通226000

运动/机械应力可以有效促进骨生成,进而预防骨质疏松疾病的发生,但其作用机制尚不完全明确。O-连接β-N-乙酰氨基葡萄糖(O-linkedβ-N-acetylglucosamine,O-GlcNAc)糖基化修饰(O-GlcNAc glycosylation modification,O-GlcNAcylation)是一种蛋白质翻译后修饰,在多种疾病的发生发展进程中发挥重要调控作用。氧连氮-乙酰葡萄糖胺转移酶(O-GlcNAc transferase,OGT)是O-GLcNAc糖基化修饰的关键酶,已有的研究证明OGT可以促进成骨分化,但其是否参与运动/机械应力促进骨生成的过程,目前尚未见有研究报道。本研究采用生长期小鼠进行跑台运动干预,同时使用Flexcell系统对MC3T3-E1细胞进行机械牵张干预,以此探究运动/机械应力对骨或成骨细胞O-GLcNAc糖基化修饰(OLinked N-Acetylglucosamine,RL2)、OGT的影响。结果发现,跑台运动可以提高生长期小鼠的骨量和骨密度(bone mineral density,BMD),提高成骨分化标志物碱性磷酸酶(alkaline phosphatase,ALP)、runt相关转录因子2(runt-related transcription factor 2,Runx2)、激活转录因子4(activated transcription factor 4,ATF4)等在骨组织中的表达,同时提高骨组织的O-GLcNAc糖基化修饰水平和OGT的表达。MC3T3-E1细胞向成骨诱导分化7 d后,发现其ALP的活性显著增加,O-GLcNAc糖基化修饰水平和OGT的表达也显著增加。机械牵张干预可以促进成骨分化标志物ALP、Runx2、ATF4等的表达,同时提高O-GLcNAc糖基化修饰水平和OGT的表达。本研究结果提示,运动/机械应力可能通过提高OGT的表达来促进成骨分化和骨生成。

关键词：运动机械应力 OGT 糖基化修饰骨生成

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鲜黄小檗叶绿体基因组特征及系统发育分析

西北植物学报 2024年第10期44卷 1616-1625页

作者：任玉玲李幸儿梁佳林赵爽孙胜男李萍青海大学生态环境工程学院西宁810016 青海大学医学院西宁810016

【目的】为明确鲜黄小檗叶绿体基因组结构特征及其与同属类群的系统发育关系,对鲜黄小檗叶绿体基因组的结构特征进行解析和系统发育分析。【方法】用IlluminaHiseqXTen技术测序,用CPGview、CodonW、MISA、Reputer、IRscope、mVISTA软件... 详细信息

【目的】为明确鲜黄小檗叶绿体基因组结构特征及其与同属类群的系统发育关系,对鲜黄小檗叶绿体基因组的结构特征进行解析和系统发育分析。【方法】用IlluminaHiseqXTen技术测序,用CPGview、CodonW、MISA、Reputer、IRscope、mVISTA软件对鲜黄小檗叶绿体基因组特征进行分析,MEGA7软件中的ML法构建系统发育树。【结果】鲜黄小檗叶绿体基因组全长166225bp,呈典型的四分体结构,全基因组GC含量为38.07%;共注释得到144个基因,包括99个蛋白质编码基因、37个tRNA基因和8个rRNA基因,其中23个基因含有内含子,32个基因为双拷贝基因;偏好使用A/U结尾的密码子;共检测到98个SSR位点和150个散在重复序列,大部分SSR位点由A和T碱基组成;SSC和IR区的变异程度高于LSC区;系统发育分析发现鲜黄小檗与威宁小檗亲缘关系最近。【结论】鲜黄小檗叶绿体基因组特征与小檗属其他物种类似,为该属物种的分子鉴定、进化关系等提供了理论基础。

关键词：鲜黄小檗叶绿体基因组序列特征系统进化

The discovery of the oldest rocks in the Kuluketage area and its geological implications

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Science China Earth Sciences 2011年第3期54卷 342-348页

作者： LONG XiaoPing YUAN Chao SUN Min XIAO WenJiao zhao GuoChun ZHOU KeFa WANG YuJing HU AiQin Key Laboratory of Isotope Geochronology and Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China Department of Earth Sciences The University of Hong Kong Pokfulam Road Hong Kong China State Key Laboratory of Lithospheric Evolution Institute of Geology and Geophysics Chinese Academy of Sciences Beijing 100029 China Xinjiang Resources and Environment Center Urumqi 830000 China

The basement rocks in the Kuluketage area are composed predominately of tonalite-trondhjemite-granodiorite rocks, and occured mainly in xinger and Korla. U-Pb dating of TTG gneiss near Korla yielded a late Neoarchean weighted mean 207Pb/206Pb age of 2.65 Ga, which is the oldest published age for the TTG rocks in the Kuluketage area and thus suggests that Archean terrane in the area was formed in the late Neoarchean. The Korla gneiss is much younger than the TTG rocks in the northern Altyn Tagh, eastern Tarim Craton, indicating that the oldest terrane of the Tarim Craton was exposed probably in the northern Altyn Tagh. Until late Neoarchean, the Tarim continent extends to the Kuluketage area and finally had generated a relatively large uniform Archean basement within the craton. Zircon Hf isotopic analyses of the TTG gneiss give low εHf(t) values (-5 to 1) with Paleoarchean to Mesoarchean two-stage model ages (TDM2) between 3.0 and 3.3 Ga, suggesting that the basement rocks in the northern Tarim Craton were derived dominately from partial melting of Paleoarchean to Mesoarchean juvenile crustal material. The Hf model ages, therefore, indicate that no continent crust older than 3.3 Ga existed in the Kuluketage area.

关键词： Tarim Craton Archean crustal growth zircon dating Hf isotope