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Strong Anisotropic Order Parameters at All-Nitride Ferromagnet/Superconductor Interfaces

Chinese Physics Letters 2024年第2期41卷 102-111页

作者： Qiao Jin Meng Yang Guozhu Song Nan Zhao shengru chen Haitao Hong Ting Cui Dongke Rong Qianying Wang Yiyan Fan chen Ge Can Wang Jiachang Bi Yanwei Cao Liusuo Wu Shanmin Wang Kui-Juan Jin Zhi-Gang cheng Er-Jia Guo Beijing National Laboratory for Condensed Matter Physics and Institute of PhysicsChinese Academy of SciencesBeijing 100190China Department of Physics&Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Department of Physics Southern University of Science and TechnologyShenzhen 518055China Songshan Lake Materials Laboratory Dongguan 523808China Ningbo Institute of Materials Technology&Engineering Chinese Academy of SciencesNingbo 315201China

Proximity effects between superconductors and ferromagnets(SC/FM)hold paramount importance in comprehending the spin competition transpiring at their *** competition arises from the interplay between Cooper pairs and ferromagnetic exchange *** proximity effects between transition metal nitrides(TMNs)are scarcely investigated due to the formidable challenges of fabricating high-quality SC/FM *** fabricated heterostructures comprising SC titanium nitride(TiN)and FM iron nitride(Fe_(3)N)with precise chemical compositions and atomically well-defined *** magnetoresistance of Fe_(3)N/TiN heterostructures shows a distinct magnetic anisotropy and strongly depends on the external ***,the superconducting transition temperatureT_(C) and critical field of TiN experience notable suppression when proximity to Fe_(3)*** observe the intriguing competition of interfacial spin orientations near𝑇T_(C)(∼1.25 K).These findings not only add a new materials system for investigating the interplay between superconductor and ferromagnets,but also potentially provide a building block for future research endeavors and applications in the realms of superconducting spintronic devices.

关键词： proximity Superconductor titanium

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离子液体添加剂对润滑脂导电性及摩擦学性能影响的研究

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摩擦学学报（中英文） 2024年第7期44卷 903-911页

作者：李自颖荆兆刚郭峰陈升儒耿帅李炳张利王晓波青岛理工大学机械与汽车工程学院山东青岛266520 青岛泰德汽车轴承股份有限公司山东青岛266041 中国科学院兰州化学物理研究所固体润滑国家重点实验室甘肃兰州730030 青岛中科润美润滑材料技术有限公司山东青岛266100

导电润滑脂可用于解决轴承电蚀问题.对以双三氟磺酸基酯离子液体为导电添加剂的锂基润滑脂展开研究,使用自主搭建的电阻测量仪考察润滑脂的导电性能;使用UMT-3型摩擦磨损试验机探究分别添加质量分数为10%和20%离子液体的润滑脂在钢/钢... 详细信息

导电润滑脂可用于解决轴承电蚀问题.对以双三氟磺酸基酯离子液体为导电添加剂的锂基润滑脂展开研究,使用自主搭建的电阻测量仪考察润滑脂的导电性能;使用UMT-3型摩擦磨损试验机探究分别添加质量分数为10%和20%离子液体的润滑脂在钢/钢接触条件下的摩擦学性能;另外将置于电场中一定时间后的离子液体润滑脂进行摩擦磨损试验,研究电场预处理对润滑脂润滑能力的影响;最后使用共聚焦显微镜对磨痕进行表面分析.结果表明:双三氟磺酸基酯离子液体作为导电添加剂能够显著提高锂基润滑脂的导电性能.双三氟磺酸基酯离子液体添加剂能够大幅增强锂基润滑脂的润滑能力,表面磨痕分析表明,往复运动条件下明显改善了接触区的磨损情况.将离子液体润滑脂置于电场中一段时间后,其润滑能力会进一步增强.

关键词：电蚀润滑脂离子液体电场导电性能摩擦学性能

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Lateral strain tailoring in manganite homostructures assisted by atomic-flat freestanding membranes

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Nano Research 2023年第5期16卷 7829-7836页

作者： Yufei Wang Yuchen Zhu shengru chen Dongke Rong Qiao Jin Er-Jia Guo College of Materials Science and Engineering Beijing University of Chemical TechnologyBeijing 100029China State Key Laboratory for Advanced Metals and Materials University of Science and Technology BeijingBeijing 100083China Beijing National Laboratory for Condensed Matter Physics and Institute of Physics Chinese Academy of SciencesBeijing 100190China Department of Physics&Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Complex oxide thin films exhibit intriguing phenomena due to the coupling between multiple degrees of freedom through interfacial structural *** tailoring of structural parameters determines unique band structure and phonon modes,regulating emergent magnetic and electrical properties of oxide ***,the construction of different strained and oriented domains in one intact oxide thin film is impossible using conventional *** we report the fabrication and quantitative structural analysis of La_(0.7)Sr_(0.3)MnO_(3)(LSMO)homostructures assisted by atomic-flat freestanding *** substrates and suspended membranes regulate the epitaxial strain and orientation of subsequently grown *** results demonstrate an ultrathin transition layer(~4 atomic layers)between freestanding membranes and LSMO films is formed due to the strain *** work offers a simple and scalable methodology for fabricating unprecedented innovative functional oxide homostructures through artificially controlled synthesis routes.

关键词： transmission electron microscopy oxide homostructure freestanding membranes manganites strain engineering

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Strain-mediated insulator-metal transition in topotactically hydro-reduced SrFeO_(2)

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Science China(Physics,Mechanics & Astronomy) 2021年第8期64卷 114-119页

作者： Shuang chen Jiali Zhao Qiao Jin Shan Lin shengru chen Hongbao Yao Jiaou Wang Zhen Fan Er-Jia Guo Haizhong Guo School of Physics and Microelectronics Zhengzhou UniversityZhengzhou 450001China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Institute for Advanced Materials and Guangdong Provincial Key Laboratory of Optical Information Materials and Technology South China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou 510006China Songshan Lake Materials Laboratory Dongguan 523808China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China Collaborative Innovation Center of Light Manipulations and Applications Shandong Normal UniversityJinan 250358China

Controlling oxygen redox reactions in transition metal oxides offers an attractive route to tune their physical properties;a topotactic structural transformation from their parent phases effectively modifies the electronic state. In this work, infinitelayered SrFeO_(2) thin films were produced from brownmillerite SrFeO_(2.5) via low-temperature hydro-reduction. After the structural transition, their out-of-plane lattice constants dramatically shrank by 12%;tensilely strained samples exhibited metallic character, whereas the compressively strained ones maintained the insulating behavior of their bulk form. According to X-ray linear dichroism results, this strain-mediated electronic anisotropy may be attributed to electron redistribution within degenerated orbitals. This suggests a possible mechanism for the metallic conductivity of infinite-layered SrFeO_(2), giving a hint for understanding emergent quantum phenomena, such as the recently discovered superconductivity in nickelates, and stimulating various applications, including in ionic conductivity and oxygen catalysis.

关键词： ferrite hydrogenation insulator-metal transition infinite layers electronic states

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Two-Dimensional Electron Gas with High Mobility Forming at BaO/SrTiO_(3) Interface

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Chinese Physics Letters 2022年第4期39卷 41-46页

作者： cheng Cao shengru chen Jun Deng Gang Li Qinghua Zhang Lin Gu Tian-Ping Ying Er-Jia Guo Jian-Gang Guo Xiaolong chen Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 101408China College of Materials Science and Opto-Electronic Technology University of Chinese Academy of SciencesBeijing 100049China Songshan Lake Materials Laboratory Dongguan 523808China

Two-dimensional electron gas(2DEG)with high electron mobility is highly desired to study the emergent properties and to enhance future device *** we report the formation of 2DEG with high mobility at the interface between rock-salt Ba O and perovskite Sr Ti O_(3).The interface consists of the ionically compensated Ba O_(1-δ) layer and the electronically compensated Ti O_(2) layer,which is demonstrated as a perfect interface without lattice *** so-formed interface features metallic conductivity with ultralow square resistance of7.3×10^(-4)Ω/□at 2 K and high residual resistance ratios R_(300 K)/R_(2 K) up to *** electron mobility reaches69000 cm^(2)·V^(-1)·s^(-1)at 2 K,leading to Shubnikov–de Haas oscillations of *** functional theory calculations reveal that the effective charge transfers from Ba O to the Ti 3d_(xy) orbital occur at the interface,leading to the conducting Ti O_(2) *** work unravels that Ba O can adapt itself by removing oxygen to minimize the lattice mismatch and to provide substantial carriers to Sr Ti O_(3),which is the key to forming 2DEGs with high mobility at the interfaces.

关键词： interface Electron resistance

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填充电池组的耐撞安全性

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北京理工大学学报 2022年第6期42卷 604-611页

作者：胡玲玲陈圣儒张子文周名哲赵昕中山大学航空航天学院广东广州510275 中汽研汽车检验中心(广州)有限公司广东广州511340

针对圆柱电池的电池组,提出了一种新型的填充保护方式来提升电池组的耐撞安全性.通过实验和数值模拟对比了填充电池组与无填充电池组的耐撞安全性,讨论了采用树脂和不同密度的泡沫金属作为填充材料对电池组安全性的影响.结果表明填充电... 详细信息

针对圆柱电池的电池组,提出了一种新型的填充保护方式来提升电池组的耐撞安全性.通过实验和数值模拟对比了填充电池组与无填充电池组的耐撞安全性,讨论了采用树脂和不同密度的泡沫金属作为填充材料对电池组安全性的影响.结果表明填充电池组呈现出更高的安全性,这是由于填充材料改变了电池的受力状态,使电池受力更合理、变形更均匀,从而减少了电池的破坏风险.树脂填充提高了电池组的硬度和刚度,在冲击荷载下,使电池组更快地进入均匀受载阶段.泡沫金属的选取需要综合考虑材料本身吸能的能力和材料对电池组能量分布的影响,硬度适中的金属泡沫填充电池组具有较好的耐撞安全性.

关键词：高速碰撞动力学动力电池电池组耐撞安全

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氟康唑联合硝呋太尔片、克霉唑治疗外阴阴道假丝酵母菌病的临床效果

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妇儿健康导刊 2023年第23期2卷 44-46页

作者：陈胜如邸媛媛广东医科大学附属第二医院妇产科广东湛江524000

目的探讨氟康唑联合硝呋太尔片、克霉唑治疗外阴阴道假丝酵母菌病的临床效果。方法选取广东医科大学附属第二医院于2021年8月至2022年8月治疗的60例外阴阴道假丝酵母菌病患者,采用随机数字表法分为两组,每组各30例。对照组采取硝呋太尔... 详细信息

目的探讨氟康唑联合硝呋太尔片、克霉唑治疗外阴阴道假丝酵母菌病的临床效果。方法选取广东医科大学附属第二医院于2021年8月至2022年8月治疗的60例外阴阴道假丝酵母菌病患者,采用随机数字表法分为两组,每组各30例。对照组采取硝呋太尔片联合克霉唑阴道片治疗,观察组在对照组用药的基础上联合氟康唑治疗,比较两组临床症状改善情况、炎症因子水平及复发情况。结果观察组尿频尿痛、外阴红肿、白带异常的改善时间短于对照组(P<0.05);治疗后观察组的白细胞介素-6、肿瘤坏死因子-α、γ干扰素水平低于对照组(P<0.05);观察组复发率低于对照组(P<0.05)。结论氟康唑联合硝呋太尔片、克霉唑治疗外阴阴道假丝酵母菌病,能够有效缩短临床症状改善时间,降低炎症因子水平及复发率。

关键词：外阴阴道假丝酵母菌病氟康唑克霉唑硝呋太尔片炎症因子复发

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盐硝联产卤水净化盐泥生产沉淀碳酸钙的研究

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中国井矿盐 2019年第6期50卷 1-4页

作者：曾华明曹嵘陈圣儒湖南省湘衡盐化有限责任公司

研究基于我公司盐硝联产卤水净化二级反应形成的盐泥废渣中化学组分的分析,提出沉淀碳酸钙的生产工艺技术,达到变废为宝、环保增效的目的。

关键词：盐泥洗涤沉淀碳酸钙

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基线抑郁焦虑状态对青少年特发性脊柱侧凸患者术后生活质量的影响

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中华骨与关节外科杂志 2024年第7期17卷 584-590页

作者：杨莹张浩然田雪王升儒陈亚萍仉建国中国医学科学院北京协和医学院北京协和医院骨科北京100730

目的:评估术前合并抑郁和焦虑对青少年特发性脊柱侧凸(AIS)患者术后生活质量的影响。方法:选取2023年4—8月北京协和医院收治的130例AIS患者作为研究对象,入院当日使用医院焦虑抑郁量表(HADS)评估患者的抑郁和焦虑状态。根据患者是否合... 详细信息

目的:评估术前合并抑郁和焦虑对青少年特发性脊柱侧凸(AIS)患者术后生活质量的影响。方法:选取2023年4—8月北京协和医院收治的130例AIS患者作为研究对象,入院当日使用医院焦虑抑郁量表(HADS)评估患者的抑郁和焦虑状态。根据患者是否合并抑郁分为HADS-D+组(29例)和HADS-D-组(101例),根据患者是否合并焦虑分为HADS-A+组(37例)和HADS-A-组(93例)。在术前和术后6个月,采用脊柱侧凸研究学会22项量表(SRS-22)对患者进行生活质量评分。结果:术后6个月,HADS-D+组患者SRS-22总分及治疗满意度评分均低于HADS-D-组患者,差异均有统计学意义(P均0.05)。结论:AIS患者接受脊柱矫形手术后,其生活质量得到显著改善。与不合并抑郁或焦虑的AIS患者相比,合并抑郁或焦虑的AIS患者术后生活质量较差。

关键词：抑郁焦虑脊柱侧凸脊柱外科生活质量

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Optimizing the growth and immune system of dairy calves by subdividing the pre-weaning period and providing different milk volumes for each stage

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Animal Nutrition 2021年第4期7卷 1296-1302页

作者： shengru Wu Xiaoyong Li Xiaodong chen Yufei Zhu Junhu Yao College of Animal Science and Technology Northwest A&F UniversityYanglingShaanxi 712100China Baoji Farm of Modern Farming BaojiShaanxi 721000PR China

In systematically considering the advantages and disadvantages of complementarity in high or low milk feeding,novel milk feeding schemes involving altering the volume of supplied milk in different stages of the pre-weaning period but maintaining the total milk feeding volume were ***-seven newborn male Holstein calves were selected and randomly assigned to 3 *** in the control(CON)group were fed 7 L of milk daily from 4 to 66 d of *** in the low-high(LH)group were fed 6 L of milk daily at the beginning,and then the daily feeding volume was later increased to 7 to 8 L of milk,which served as the early-period low-volume feeding *** calves in the high-low(HL)group were fed 7 to 8 L daily at the beginning,and then the daily feeding volume was decreased to 6 L of milk,which served as the early-period high-volume feeding *** all calves were fed 3 L of milk daily from 67 to 70 d of age,weaned at 70 d of age,and then fed starter feed to 100 d of *** calves had access to the starter feed from 15 to 100 d of *** diarrheal condition of calves was recorded daily and the growth performance including the starter feed intake and body weight of calves was recorded at 70 and 100 d of ***,five 100-d-old calves from each treatment were sampled for measurement of plasma indices,ruminal morphology,and volatile fatty *** compared with the CON and LH groups,calves in the HL group exhibited a significantly increased body weight and lower diarrhoeal *** compared with the CON group,calves in the HL group exhibited a significantly increased average daily feed intake,ruminal epithelium papillae length,total volatile fatty acids,and percentages of propionate and ***,the significantly increased plasma immunoglobulin G(IgG)content and a trend of decreased tumor necrosis factor-α(TNF-α)content(P=0.083)were also identified in the HL group when compared with the CON ***,the early-period high-volume feeding

关键词： Milk feeding Pre-weaning calf Immune function Growth performance

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