检索结果-南通市图书馆

Magnetic phase transition and continuous spin switching in a high-entropy orthoferrite single crystal

Frontiers of physics 2024年第2期19卷 157-167页

作者： Wanting Yang Shuang Zhu Xiong Luo Xiaoxuan Ma Chenfei Shi Huan Song Zhiqiang Sun Yefei Guo Yuriy Dedkov Baojuan Kang Jin-Ke Bao shixun cao Department of Physics Shanghai UniversityShanghai 200444China Materials Genome Institute and International Center for Quantum and Molecular Structures Shanghai UniversityShanghai 200444China School of Physics Southeast UniversityNanjing 211189China Shanghai Key Laboratory of High Temperature Superconductors Shanghai UniversityShanghai 200444China

Rare-earth orthoferrite REFeO_(3)(where RE is a rare-earth ion)is gaining *** created a high-entropy orthoferrite(Tm_(0.2)Nd_(0.2)Dy_(0.2)Y_(0.2)Yb_(0.2))FeO_(3)(HEOR)by doping five RE ions in equimolar ratios and grew the single crystal by optical floating zone *** strongly tends to form a single-phase structure stabilized by high configurational *** the low-temperature region(11.6‒14.4 K),the spin reorientation transition(SRT)ofΓ_(2)(F_(x),C_(y),G_(z))‒Γ_(24)‒Γ_(4)(G_(x),A_(y),F_(z))*** weak ferromagnetic(FM)moment,which comes from the Fe sublattices distortion,rotates from the a-to *** two-step dynamic processes(Γ_(2)‒Γ_(24)‒Γ_(4))are identified by AC susceptibility *** in HEOR can be tuned in the range of 50‒60000 Oe,which is an order of magnitude larger than that of orthoferrites in the peer system,making it a candidate for high-field spin *** spin-switching(SSW)and continuous spin-switching(CSSW)effects occur under low magnetic fields due to the strong interactions between RE‒Fe *** CSSW effect is tunable between 20‒50 Oe,and hence,HEOR potentially can be applied to spin modulation ***,because of the strong anisotropy of magnetic entropy change()and refrigeration capacity(RC)based on its high configurational entropy,HEOR is expected to provide a novel approach for refrigeration by altering the orientations of the crystallographic axes(anisotropic configurational entropy).

关键词： high-entropy oxide rare-earth orthoferrite spin reorientation transition spin switching magnetocaloric effect

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Annealing-induced long-range charge density wave order in magnetic kagome FeGe:Fluctuations and disordered structure

引用

Science China(Physics,Mechanics & Astronomy) 2024年第11期67卷 112-121页

作者： Chenfei Shi Yi Liu Bishal Baran Maity Qi Wang Surya Rohith Kotla Sitaram Ramakrishnan Claudio Eisele Harshit Agarwal Leila Noohinejad Qian Tao Baojuan Kang Zhefeng Lou Xiaohui Yang Yanpeng Qi Xiao Lin Zhu-An Xu Arumugam Thamizhavel Guang-Han cao Sander Van Smaalen shixun cao Jin-Ke Bao Department of Physics Materials Genome InstituteInstitute for Quantum Science and TechnologyShanghai UniversityShanghai 200444China Key Laboratory of Quantum Precision Measurement of Zhejiang Province School of PhysicsZhejiang University of TechnologyHangzhou 310023China School of Physics Zhejiang UniversityHangzhou 310027China Department of Condensed Matter Physics and Materials Science Tata Institute of Fundamental ResearchMumbai 400005India School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China ShanghaiTech Laboratory for Topological Physics ShanghaiTech UniversityShanghai 201210China Laboratory of Crystallography University of BayreuthBayreuth 95447Germany Department of Quantum Matter AdSEHiroshima UniversityHigashi-Hiroshima 739-8530Japan P24 PETRA IIIDeutsches Elektronen-Synchrotron DESYHamburg 22607Germany Key Laboratory for Quantum Materials of Zhejiang Province School of ScienceWestlake UniversityHangzhou 310024China Department of Physics China Jiliang UniversityHangzhou 310018China Shanghai Key Laboratory of High-resolution Electron Microscopy ShanghaiTech UniversityShanghai 201210China Collaborative Innovation Centre of Advanced Microstructures Nanjing UniversityNanjing 210093China Shanghai Key Laboratory of High Temperature Superconductors Shanghai UniversityShanghai 200444China School of Physics Hangzhou Normal UniversityHangzhou 311121China

Charge density wave(CDW) in kagome materials with the geometric frustration is able to carry unconventional ***, a CDW has been observed below the antiferromagnetic order in kagome FeGe, in which magnetism and CDW are intertwined to form an emergent quantum ground state. However, the CDW is only short-ranged and the structural modulation originating from it has yet to be determined experimentally. Here we realize a long-range CDW order by post-annealing process,and resolve the structure model through single crystal X-ray diffraction. Occupational disorder of Ge resulting from short-range CDW correlations above T_(CDW) is identified from structure refinements. The partial dimerization of Ge along the c axis is unveiled to be the dominant distortion for the CDW. Occupational disorder of Ge is also proved to exist in the CDW phase due to the random selection of partially dimerized Ge sites. Our work provides useful insights for understanding the unconventional nature of the CDW in FeGe.

关键词： charge density wave kagome disordered structure fluctuations

来源：

维普期刊数据库

同方期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Cu-doping induced ferromagnetic insulating behavior and domain wall pinning effects in LaMnO_3

引用

Rare Metals 2011年第4期30卷 359-367页

作者： GAO Tian cao shixun LIU Yongsheng ZHANG Yufeng ZHANG Jincang Department of Mathematics and Physics Shanghai University of Electric Power Shanghai 201300 China Department of Physics Shanghai University Shanghai 200444 China

A systematic study on the structural, magnetic, and electrical transport properties was performed for the LaMnlxCUxO3 system. A single phase of orthorhornbic perovskite structure was formed for x = 0.05-0.40. A striking paramagnetic-ferromagnetic transition and a considerable magnetoresistance effect were observed at the ferromagnetic ordering temperature Tc, but no insulator-metal transition induced by Cu-doping was observed. Below Tc, a visible unexpected drop was observed in the ac susceptibility and zero-field-cooled dc magnetization for the dilute doped samples with x≤0.10, which was proven to be associated with domain wall pinning effects by milling the bulk material into single domain particles. It is validated that there is no exchange interaction between Cu and Mn, and double exchange interactions between Mn^3＋ and Mn^4＋ are induced by Cu-doping in the anti-ferromagnetic LaMnO3 matrix, whereas the severe distortion and disorder caused by occupied-dopant prohibits charge carriers from hopping.

关键词： manganites lanthanum compounds copper doping ferromagnetism domain wall pinning

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A comprehensive first-principle study of borophene-based nano gas sensor with gold electrodes

引用

Frontiers of physics 2022年第1期17卷 183-189页

作者： Yueyue Tian Houping Yang Junjun Li Shunbo Hu shixun cao Wei Ren Yin Wang International Centre for Quantum and Molecular Structures and Department of Physics Shanghai UniversityShanghai200444China Hongzhiwei Technology(Shanghai)Co. Ltd.Shanghai201206China Materials Genome Institute Shanghai UniversityShanghai200444China

Using density functional theory combined with nonequilibrium Green’s function method,the transport properties of borophene-based nano gas sensors with gold electrodes are calculated,and comprehensive understandings regarding the effects of gas molecules,MoS2 substrate and gold electrodes to the transport properties of borophene are *** show that borophene-based sensors can be used to detect and distinguish CO,NO,NO2 and NH3 gas molecules,MoS2 substrate leads to a nonlinear behavior on the current-voltage characteristic,and gold electrodes provide charges to borophene and form a potential barrier,which reduced the current values compared to the current of the systems without gold *** studies not only provide useful information on the computationally design of borophene-based gas sensors,but also help understand the transport behaviors and underlying physics of 2D metallic materials with metal electrodes.

关键词： quantum transport borophene gold electrodes heterostructure

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Positron Annihilation During Pre-crystallization Process in an Amorphous Silver Ionic Conductor

引用

Chinese Physics Letters 1993年第1期10卷 37-40页

作者： cao shixun CHEN Liquan XUE Rongjian HE Yusheng YU Weizhong Department of Physics Henan Normal UniversityXinxiang 453002 Institute of Physics Academia SinicaBeiing 100080 Department of Physics Tsinghua UniversityBeijing 100084

The study of positron annihilation on amorphous 0.60AgI-O.25Ag_(2)O-0.15P_(2)O_(5) has been carried out in the temperature range from 100 to *** temperature dependence of average lifetime shows anomalous peaks at 208,228,325,338 K indicating possible structure *** the last two peaks reflect the structural changes during pre-crystallization process of the amorphous ionic *** results are consistent with that of ultrasonic attenuation and ionic conductivity experiments on the same samples.

关键词： crystallization amorphous Silver

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Experimental evidence for type-1.5 superconductivity in ZrB_(12)single crystal

引用

Science China(Physics,Mechanics & Astronomy) 2022年第9期65卷 119-127页

作者： An-Lei Zhang Li-Xin Gao Jing-Yu He Volodimir B.Filipov shixun cao Qi-Ling Xiao Jun-Yi Ge Materials Genome Institute Shanghai UniversityShanghai 200444China Frantsevich Institute for Problems of Materials Science NASUKiev 03680Ukraine Department of Physics Shanghai Key Laboratory for High Temperature SuperconductorsShanghai UniversityShanghai 200444China Zhejiang Laboratory Hangzhou 311100China

Recent studies proposed the two-band effect and the related type-1.5 superconductivity in Zr B12single ***,by combining both macroscopic and microscopic measurements,the superconducting properties and the intricate vortex matter of Zr B12are studied in *** vortex phase diagram is constructed,where the temperature dependence of the upper critical field can be well reproduced using a two-band Werthamer-Helfand-Hohenberg(WHH)model.A pronounced surface superconductivity is also found in the same temperature range,where the semi-Meissner state is *** phenomena are attributed to the weakly coupled two-band *** direct visualization of the semi-Meissner state exhibits an inhomogeneous distribution of vortex clusters,vortex chains and large Meissner *** the increase of magnetic field,a transition from the semi-Meissner state to the mixed state is revealed and further supported by statistical analysis of the vortex *** results provide direct experimental evidence for the type-1.5 superconductivity in ZrB_(12).

关键词： type-1.5 superconductivity vortex semi-Meissner state MFM

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Selected multiferroic perovskite oxides containing rare earth and transition metal elements

引用

Chinese Science Bulletin 2014年第36期59卷 5170-5179页

作者： Shunbo Hu Lei Chen Yabei Wu Liming Yu Xinluo Zhao shixun cao Jincang Zhang Wei Ren Department of Physics Shanghai University

Multiferroic materials are currently the subject of intensive research worldwide, because of both their fundamental scientific problems and also possible technological applications. Among a number of candidates in the laboratories, compounds consisting of rare earth and transition metal perovskite oxides have very unusual structural and physical properties. In contrast to the so-called type I multiferroics, ferroelectricity may be induced by magnetic ordering or by applying external fields. In this review, the recent progress on the experimental and theoretical studies of some selected type II multiferroics is presented, with a focus on the perovskite oxides containing rare earth and transition metal elements. The rare earth orthoferrite crystals, rare earth titanate strained film, and rare earthbased superlattices are systematically reviewed to provide a broad overview on their promising electric, magnetic, and structural properties. The recent experimental advances in single-crystal growth by optical floating zone method are also presented. First-principles investigations, either supported by experimental results or awaiting for experimental verifications, are shown to offer useful guidance for the future applications of unconventional multiferroics.

关键词：钙钛矿型氧化物过渡金属元素稀土元素铁电性钙钛矿氧化物外部磁场结构特性实验室

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Single crystal growth and novel physical properties of rear earth orthoferrites RFeO3

Single crystal growth and novel physical properties of rear ...

引用

第十六届全国晶体生长与材料学术会议

作者： shixun cao Department of Physics Shanghai University

In recent years,rare-earth orthoferrites RFeO3(where R is a rare-earth ion)have attracted much interest in many applied and fundamental areas of condensed matter

关键词： Single crystal growth and novel physical properties of rear earth orthoferrites RFeO3

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

Epitaxial growth of single-crystalline Ni46Co4Mn37In13 thin film and investigation of its magnetoresistance

引用

Progress in Natural Science:Materials International 2014年第1期24卷 19-23页

作者： Chao Jing Yejun Yang Xiaolong Wang Pan Liao Dong Zheng Baojuan Kang shixun cao Jincang Zhang Jie Zhu Zhe Li Department of Physics Shanghai University State Key Laboratory of Surface Physics and Department of Physics Fudan University College of Physics and Electronic Engineering Key Laboratory for Advanced Functional and Low Dimensional Materials of Yunnan Higher Education InstitutesQujing Normal University

Single-crystalline thin film of Ni46Co4Mn37In13alloy grown on MgO(0 0 1) was prepared by Pulsed Laser Deposition(PLD) method. The epitaxial growth process was monitored by in situ Reflection High Energy Electron Diffraction(RHEED). Structure measurements reveal that the single-crystalline Ni46Co4Mn37In13film could be stabilized on MgO(0 0 1) as a face-centered-cubic(fcc) structure. From the evolution of RHEED,it can be deduced from the patterns that Volmer-Weber growth mechanism(3-D) dominates at the initial stage. Then,it becomes layerby-layer growth mechanism(2-D) with the increase of the film thickness. Lastly,growth mechanism converts back to 3-D when the film is thick enough. Both electrical resistance and magnetoresistance(MR) were measured at various temperatures using Physical Property Measurement System(PPMS). The electrical resistance measurement indicates that the film sample does not have martensitic transformation in the measurement temperature range. However,with the temperature increasing,the film sample exhibits a transition from metallic to semiconductorlike properties. Moreover,a small negative magnetoresistance was observed at different temperature,which can be explained by the spindependent scattering of the conduction electrons.

关键词： Pulsed laser deposition Magnetoresistance

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Magnetocrystalline anisotropy and dynamic spin reorientation of half-doped Nd_(0.5)Pr_(0.5)FeO_(3)single crystal

引用

Chinese Physics B 2021年第7期30卷 538-542页

作者： Haotian Zhai Tian Gao Xu Zheng Jiali Li Bin Chen Hongliang Dong Zhiqiang Chen Gang Zhao shixun cao Chuanbing Cai Vyacheslav V.Marchenkov Department of Physics Shanghai University of Electric PowerShanghai 200090China Center for High Pressure Science and Technology Advanced Research Shanghai 201203China Shanghai Key Laboratory of High Temperature Superconductors Shanghai UniversityShanghai 200444China M.N.Mikheev Institute of Metal Physics Ekaterinburg 620108Russia Ural Federal University Ekaterinburg 620002Russia

The single crystals of Nd_(0.5)Pr_(0.5)FeO_(3)were successfully grown by optical floating zone *** temperature x-ray diffraction and Laue photograph declared the homogeneity and high quality of the *** significant magnetic anisotropy and multiple magnetic transitions illustrate the complex magnetic *** high temperatures(T>66 K),it shows the typical characteristics ofΓ_(4)(G_(x),A_(y),F_(z))*** the decrease of the temperature,it undergoes a first-order spin reorientation transition fromΓ_(4)(G_(x),A_(y),F_(z))toΓ_(2)(F_(x),C_(y),G_(z))state in the temperature window of 45-66 K under an applied magnetic field of 0.01 *** the temperature drops to~17 K,a new magnetic interaction mechanism works,which results in a further enhancement of *** T-H phase diagram of Nd_(0.5)Pr_(0.5)FeO_(3)single crystal was finally constructed.

关键词： rare earth orthoferrite magnetocrystalline anisotropy magnetic ordering magnetic hysteresis

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：