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Elucidating elusive quaternary selenide EuCeCuSe3:Synthesis,crystal structure,properties and theoretical studies

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Journal of Rare Earths 2024年第1期42卷 163-171,I0006页

作者： Maxim V.Grigoriev Anna V.Ruseikina Maxim S.Molokeev vladimir A.Chernyshev Aleksandr S.Aleksandrovsky Alexander S.Krylov Svetlana N.Krylova Nikolai P.Shestakov Dmitriy A.Velikanov Alexander A.Garmonov Alexey V.Matigorov Evgeny A.Ostapchuk Thomas Schleid Damir A.Safin Laboratory of Theory and Optimization of Chemical and Technological Processes University of TyumenVolodarskogo Str.6625003TyumenRussian Federation Kirensky Institute of Physics Federal Research Center KSC SB RASAkademgorodok 50 Bld.38660036KrasnoyarskRussian Federation Department of Physics Far Eastern State Transport UniversitySerysheva Str.47680021KrasnoyarskRussian Federation Institute of Natural Sciences and Mathematics Ural Federal University Named After the First President of Russia B.N.YeltsinMira Str.19620002EkaterinburgRussian Federation Department of Photonics and Laser Technology Siberian Federal UniversitySvobodnii Ave.79660079KrasnoyarskRussian Federation Institute of Physics and Technology University of TyumenVolodarskogo Str.6625003 TyumenRussian Federation Institute for Inorganic Chemistry University of StuttgartPfaffenwaldring 55D-70569StuttgartGermany Scientific and Educational and Innovation Center for Chemical and Pharmaceutical Technologies Ural Federal University named after the First President of Russia B.N.YeltsinMira Str.19620002 EkaterinburgRussian Federation University of Tyumen Volodarskogo Str.6625003TyumenRussian Federation

We report on the novel heterometallic quaternary selenide EuCeCuSe3,the fabrication of which has been a challenge until this *** structure of the reported selenide was elucidated from the powder X-ray diffraction data,which revealed the formation of EuCeCuSe3with excellent yield(96.7%)accompanied with a minor fraction of CeSe2(3.3%),and was best solved in orthorhombic space group Pnma with the BaLaCuS3structural ***,the crystal structure of the title compound completes the row of the heterometallic quaternary selenides EuRECuSe3(RE=La,Pr,Nd,Sm,Eu,Gd,Tb,Dy,Ho,Er,Tm,Yb,Lu,Y),of which the cerium-based derivative exclusively belongs to the BaLaCuS3structural *** distortion of the CuSe4polyhedron was compared for the whole series of EuRECuSe3compounds using theτ4-descriptor for four coordinated ions,which revealed the highest degree of distortion for the Ce3+-containing selenide,followed by the La3+-based ***,the crystallographic and geometrical parameters of the reported selenide were discussed in comparison to the Ce3+-based sulfides SrCeCuS3and *** initio calculations of the crystal structure,a phonon spectrum and elastic constants for the crystal of EuCeCuSe3were also *** types and wavenumbers of fundame ntal modes were determined and the involvement of ions participating in the phonon modes was *** experimental IR spectrum of the reported selenide was interpreted and found to be in agreement with the calculated *** experimental direct band gap of EuCeCuSe3was measured to be 1.36 eV that is consistent with the concept of its origin due to interband transitions between orbitals emerging mainly from 4f(valence band)and 5d(conduction band)levels of the Eu2+*** dependence of the Young’s modulus on the direction demonstrates the anisotropy of the elastic properties,while the Vickers hardness for EuCeCuSe3was calculated to be 5.2 ***,the title compound is paramagnetic above 4 K.

关键词： Quaternary selenide Synthesis Crystal structure Ab initio calculations Magnetic measurements Spectroscopy

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中红外大模场单模全固态硫系光子晶体光纤

中国激光 2024年第17期 248-256页

作者：李宁哲贾金升张敏王煜泽肖峰黄庆白胜闯 vladimir Shiryaev 戴世勋聂秋华王训四宁波大学信息科学与工程学院高等技术研究院红外材料与器件实验室浙江省光电探测材料及器件重点实验室俄罗斯科学院高纯物质化学研究所宁波海洋研究院

针对当前硫系光纤难以同时实现高功率传输与高光束质量的问题，通过COMSOL软件仿真模拟光纤性质，设计出了满足单模传输需要且具有大模场面积的光子晶体光纤（PCF）的结构参数。所设计的光纤在1.5～10μm的波长范围内满足高阶模(LP11)... 详细信息

针对当前硫系光纤难以同时实现高功率传输与高光束质量的问题，通过COMSOL软件仿真模拟光纤性质，设计出了满足单模传输需要且具有大模场面积的光子晶体光纤（PCF）的结构参数。所设计的光纤在1.5～10μm的波长范围内满足高阶模(LP11)与基模(LP01)的限制损耗比大于10～2的单模条件，且光纤基模的有效模面积在波长2μm处约为5362μm2。根据仿真模拟的结构参数，探索出新型动、静态蒸馏相结合的技术，制备出高纯硫系玻璃，结合新型的挤压-堆积法，制备出基于全硫系玻璃的全固态大模场单模光子晶体光纤。该光纤在波长1.55μm处的近高斯光能量分布特征验证了其单模特性；同时在弯曲半径为14 cm的1.5 m长的光纤中观察到低弯曲损耗为1 dB，与仿真结果基本一致，表明此全固态光子晶体光纤具有出色的单模传输和抗弯性能，在中红外高能激光传输方面具备一定的应用潜能。

关键词：光纤光学中红外全固态光子晶体光纤硫系玻璃大模场面积单模传输

20%PEG胁迫下评价引进哈萨克斯坦不同春小麦种质苗期的抗旱性

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新疆农业科学 2024年第6期61卷 1352-1360页

作者：王一钊杨其志刘玉秀阿拉依·努尔卡马力 vladimir Shvidchenko 张正茂西北农林科技大学农学院陕西杨凌712100 哈萨克斯坦赛福林农业技术大学阿斯塔纳010000

【目的】研究引进哈萨克斯坦不同春小麦种质的萌发和生理特性,为选育适宜我国西北旱区春小麦品种提供亲本材料。【方法】采用20%聚乙二醇(polyethylene glycol,PEG)高渗溶液模拟干旱胁迫条件,比较分析28份小麦种质(其中引进哈萨克斯坦... 详细信息

【目的】研究引进哈萨克斯坦不同春小麦种质的萌发和生理特性,为选育适宜我国西北旱区春小麦品种提供亲本材料。【方法】采用20%聚乙二醇(polyethylene glycol,PEG)高渗溶液模拟干旱胁迫条件,比较分析28份小麦种质(其中引进哈萨克斯坦春小麦种质25份)苗期的根长、苗长、根鲜/干重、苗鲜/干重、发芽率、发芽势及发芽指数的变化,利用隶属函数、主成分分析综合评价不同春小麦种质苗期抗旱性。【结果】与对照相比,干旱胁迫显著降低种质苗期的根长、苗长、根鲜重、苗鲜/干重、发芽势和发芽率(P<0.05),降低幅度为18.29%~52.17%;显著增加根干重(P<0.05),平均增加了66.67%。各性状间存在不同程度的相关性,大多数性状抗旱系数间存在显著或极显著相关。9个小麦苗期抗旱相关指标可转换为4个(苗鲜/干重、苗长和发芽率)独立的综合指标可作为哈萨克斯坦春小麦苗期耐旱性评价的主效指标。28份供试材料的加权抗旱指数进行聚类分析,5份为抗旱性强种质,17份为抗旱性种质,6份为抗旱性弱种质。【结论】25份引进哈萨克斯坦春小麦种质中有5份种质,苗期具有较强的萌发特性和抗旱能力,适宜在我国西北旱区春小麦育种中提供抗旱亲本材料。

关键词：春小麦引种种质苗期抗旱性隶属函数

The Power of China's Railways

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Beijing Review 2024年第7期67卷 48-48页

作者： vladimir Krotov East China Normal University in Shanghai

China is the world's third largest country by total land area,so the development of railways is a key issue in passenger and freight ***,the Chinese railway network is one of the largest in the world and railway infra... 详细信息

关键词： railway continue passenger

树轮记录的阿尔泰山南坡过去304年夏季温度变化及水热配置模式

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第四纪研究 2024年第4期44卷 859-868页

作者：李强刘禹 Olga Solomina 王嘉川 vladimir Matskovsky 宋慧明孙长峰庞文轩闫亚兰蔡秋芳任萌程海全球环境变化研究院西安交通大学陕西西安710049 黄土与第四纪地质国家重点实验室中国科学院地球环境研究所陕西西安710061 Institute of Geography Russian Academy of SciencesMoscow 119017Russia 西安地球环境创新研究院陕西西安710061

阿尔泰山南坡受到西风急流、北冰洋冷湿气流、蒙古-西伯利亚高压和亚洲低压共同影响,形成了当地特有的气候模式;同时,阿尔泰山地区是欧亚沟通的枢纽地带,气候变化对周边人类生产生活以及生态系统影响显著。因此有必要了解阿尔泰山周边... 详细信息

阿尔泰山南坡受到西风急流、北冰洋冷湿气流、蒙古-西伯利亚高压和亚洲低压共同影响,形成了当地特有的气候模式;同时,阿尔泰山地区是欧亚沟通的枢纽地带,气候变化对周边人类生产生活以及生态系统影响显著。因此有必要了解阿尔泰山周边气候变化长期历史,识别气候变化特征,总结规律以应对未来气候变化带来的灾害。本研究利用相关分析发现阿尔泰山南坡西伯利亚落叶松树轮宽度年表与夏季(6~7月)温度呈显著关系(r=0.626,n=58,p<0.001),进而建立一阶线性回归模型方程定量重建了阿尔泰山南坡过去304年(1715~2018年)夏季温度变化。统计结果显示重建序列稳定可靠,并有能力代表大范围的温度变化特征。重建存在5个暖期(1740~1767年、1775~1793年、1837~1847年、1898~1909年、1990~2018年)和5个冷期(1715~1727年、1807~1828年、1848~1858年、1876~1897年、1927~1940年)。虽然自1990年来温度持续上升(1990~2018年温度距平0.33℃),但并未超过1740~1767年的温度(温度距平0.49℃)。结合周边降水重建序列,发现研究区域在过去3个多世纪表现出夏季水热同步的配置模式,即暖湿/冷干模态占主导地位。

关键词：温度重建树轮宽度阿尔泰山西伯利亚落叶松

Incubation time fracture criterion for FEM simulations

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Acta Mechanica Sinica 2011年第4期27卷 541-549页

作者： vladimir Bratov Institute for Problem in Mechanical Engineering of the Russian Academy of Sciences Bolshoj pr.V.O.61199178St.-PetersburgRussia

The paper is discussing problems connected with embedment of the incubation time criterion for brittle fracture into finite element computational schemes. Incubation time fracture criterion is reviewed; practical questions of its numerical implementation are extensively discussed. Several examples of how the incubation time fracture criterion can be used as fracture condition in finite element computations are given. The examples include simulations of dynamic crack propagation and arrest, impact crater formation （i.e. fracture in initially intact media）, spall fracture in plates, propagation of cracks in pipelines. Applicability of the approach to model initiation, development and arrest of dynamic fracture is claimed.

关键词： Fracture dynamics Incubation time Crack dy-namics Finite element method Fracture arrest

Author Correction: ITO-free silicon-integrated perovskite electrochemical cell for light-emission and light-detection

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Opto-Electronic Advances 2024年第3期7卷 50-50页

作者： Maria Baeva Dmitry Gets Artem Polushkin Aleksandr Vorobyov Aleksandr Goltaev vladimir Neplokh Alexey Mozharov Dmitry VKrasnikov Albert GNasibulin Ivan Mukhin Sergey Makarov Alferov University Khlopina 8/3St.Petersburg 194021Russia Department of Physics and Engineering ITMO UniversityLomonosova 9St.Petersburg 197101Russia Institute of Automation and Control Processes(IACP) Far Eastern Branch of Russian Academy of SciencesUlitsa Radio 5Vladivostok 690041Primorsky KraiRussia Peter the Great St.Petersburg Polytechnic University Polytechnicheskaya 29St.Petersburg 195251Russia Skolkovo Institute of Science and Technology Nobel 3Moscow 121205Russia Qingdao Innovation and Development Center Harbin Engineering UniversityQingdao 266000China.

Correction to:Opto-Electronic Advances https://***/10.29026/oea.2023.220154 published online 26 April 2023 After the publication of this article1,it was brought to our attention that calculations of the PeLEC device elec-troluminescent(EL)efficiency contained a mistake,leading to an inaccurate quantity *** device’s maxim-um EL efficiency constitutes not‘~120 klm/W’but‘4.3 lm/W’*** details are listed below.

关键词： value. perovskite listed

Features of Electroplastic Effect in Alloys with Martensite Transformation

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Acta Metallurgica Sinica(English Letters) 2018年第12期31卷 1305-1310页

作者： vladimir Stolyarov Mechanical Engineering Research Institute RussianAcademy of SciencesM.Kharitonievsky4MoscowRussia 101990 National Research Nuclear University MEPhI MoscowRussia

Influence of different electric current modes （pulse and direct） on occurrence of the electroplastic effect under uniaxialtension in the coarse-grained alloys with martensite transformations is investigated. The materials are shape memoryTi49.3Niso.7 alloy and metastable austenite transformation-induced plasticity （TRIP） steel. The paper contains experimentalresults of current impact on the ＂stress-strain＂ curves of the material. It has been taken an experimental measurement ofthe sample temperature during the test. It is shown that the shape of a stress-strain curves and type of the serrate plasticflow, connected with the martensitic transformation and electroplastic effect, depend on the current modes. Impact of pulsecurrent and direct current suppresses shape memory and TRIP effect.

关键词： Electroplastic effect TRIP effect Pulse current Deformation Martensite transformation Tension

Thermoelectric and electrical characteristics of SmS ceramic samples after exposure to a pulsed magnetic field

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Journal of Rare Earths 2022年第11期40卷 1778-1784,I0004页

作者： Ivan Volchkov Evgeniy Baskakov vladimir Strelov vladimir Kanevskii FSRC"Crystallography and Photonics"RAS Leninskiy Prospekt 59119333MoscowRussia

Samarium monosulfide(SmS)is a promising material for creating thermoelectric generators(TEG),gas sensors and strain *** the high values of the generated thermo electromotive force(TEMF)(α≈170-350μV/K),methods for increasing the efficiency of TEGs based on SmS are of considerable *** of these methods can be short-term effects of magnetic fields,including pulsed ones,on these *** action of a pulsed magnetic field(PMF)leading to an increase in TEMF(U)of SmS ceramic samples is *** that are not subjected to high frequency currents(HFC)annealing show an increase in UT of 44.54%-62.18%(from 11.9 to 17.2-19.3 mV).The conductivity(σ)of the samples is~22 Q/cm and is insensitive to short-term exposure to a *** that undergo HFC annealing show an increase in Uof 23.47%-41.31%(from 21.3 to 26.3-30.1 mV)after exposure to a *** conductivity of the samples is~15Ω^(-1)/cm and after a short exposure to the PMF is changing nonmo notonically,with an increase in the overall *** difference in the values of Uand a can be explained by presence of an ordered grain structure and a significant amount of the Sm_(2)O_(2)S phase in the samples subjected to HFC *** mechanisms of the observed changes are discussed.

关键词： Rare earths Thermoelectric Electric properties Magnetically induced changes Samarium monosulfide