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Inverse spin Hall effect in ITO/YIG exited by spin pumping and spin seebeck experiments

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Chinese Physics B 2019年第1期28卷 550-554页

作者：朱科建林伟坚苏仰涛石海滨孟洋赵宏武 Beijing National Laboratory for Condensed Matter Physics Institute of Physics Chinese Academy of Sciences School of Physical Sciences University of Chinese Academy of Sciences Songshan Lake Materials Laboratory

Spin currents, which are excited in indium tin oxide(ITO)/yttrium iron garnet(YIG) by the methods of spin pumping and spin seebeck effect, are investigated through the inverse spin Hall effect(ISHE). It is demonstrated that the ISHE voltage can be generated in ITO by spin pumping under both in-plane and out-of-plane magnetization configurations.Moreover, it is observed that the enhancement of spin Hall angle and interfacial spin mixing conductance can be achieved by an appropriate annealing process. However, the ISHE voltage is hardly seen in the presence of a longitudinal temperature gradient. The absence of the longitudinal spin seebeck effect can be ascribed to the almost equal thermal conductivity of ITO and YIG and specific interface structure, or to the large negative temperature dependent spin mixing conductance.

关键词： spin pumping spin seebeck effect inverse spin Hall effect

Simultaneous Enhancement of Electrical Conductivity and seebeck Coefficient of Poly(3,4-ethylenedioxythiophene):Poly(styrenesulfonate)Films Treated with Urea

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Chinese Physics Letters 2011年第3期28卷 191-194页

作者：孔芳芳刘聪聪徐景坤蒋丰兴卢宝阳岳瑞瑞刘国栋王建民 Jiangxi Key Laboratory of Organic Chemistry Jiangxi Science and Technology Normal UniversityNanchang 330013 School of Communication and Electronics Jiangxi Science and Technology Normal UniversityNanchang 330013

The thermoelectric performance of free-standing poly(3,4-ethylenedioythiophene):poly(styrenesulfonate)(PEDOT:PSS)thin films deposited from aqueous dispersion treated by different concentrations of urea are investigated in detail.The electrical conductivity,seebeck coefficient and power factor of PEDOT:PSS films versus temperature are determined,respectively.It is found that both the electrical conductivity and seebeck coefficient of PEDOT:PSS films are enhanced after treatment with urea.Conductivity could be enhanced from 8.16 to 63.13S-cm^(-1),the seebeck coefficient is increased from 14.47 to 20.7μV.K^(-1)and the power factor is rises to 2.7μW.m^(-1)K^(-2)at 300K.

关键词： seebeck conductivity electrical

CuI/Nylon Membrane Hybrid Film with Large seebeck Effect

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Chinese Physics Letters 2021年第12期38卷 28-32页

作者：韩晓雯陆怡铭刘莹伍苗苗李雅婷王子兴蔡克峰 Key Laboratory of Advanced Civil Engineering Materials(Ministry of Education) Shanghai Key Laboratory of Development and Application for Metal-Functional MaterialsSchool of Materials Science&EngineeringTongji UniversityShanghai 201804China

Room-temperature thermoelectric materials are important for converting heat into electrical energy.As a widebandgap semiconductor material,CuI has the characteristics of non-toxicity,low cost,and environmental friendliness.In this work,CuI powder was synthesized by a wet chemical method,then CuI film was formed by vacuum assisted filtration of the CuI powder on a porous nylon membrane,followed by hot pressing.The film exhibits a large seebeck coefficient of 600μV·K^(-1)at room temperature.In addition,the film also shows good flexibility(~95%retention of the electrical conductivity after being bent along a rod with a radius of 4 mm for 1000 times).A finger touch test on a single-leg TE module indicates that a voltage of 0.9 mV was immediately generated within 0.5 s from a temperature difference of 4 K between a finger and the environment,suggesting the potential application in wearable thermal sensors.

关键词： seebeck nylon radius

High-throughput screening of room temperature active Peltier cooling materials in Heusler compounds

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npj Computational Materials 2022年第1期8卷 1899-1904页

作者： Huifang Luo Xin Li Yuxiang Wang Yeqing Jin Mingjia Yao Jiong Yang Materials Genome Institute Shanghai UniversityShanghai200444China State Key Laboratory of Functional Materials for Informatics Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai200050China Zhejiang Laboratory HangzhouZhejiang311100China

Active Peltier cooling enables Peltier heat transfer in addition to the traditional Fourier thermal conductance,which is useful in some special applications,such as the microthermostats.From the material wise,however,the study on the active Peltier cooling materials is rare.We carried out a high-throughput workflow to screen out 5 room-temperature active Peltier cooling materials,GaSbLi_(2),HgPbCa_(2),SnTiRu_(2),GeYbLi_(2),and GeTiFe_(2),from 2958 Heusler materials.All the five materials are semimetals or very narrow band gap systems with high electrical conductivity.Some of these materials have relatively large seebeck coefficients due to the band asymmetry.Their effective thermal conductivityκ_(eff)s,which are the summation of active Peltier thermal conductivity and passive thermal conductivity,are all greater than Cu at the room temperature andΔT=1 K.The present work gives a possible way to search active cooling Peltier materials for the applications of precise temperature control.

关键词： conductivity precise seebeck

Exciton seebeck in Molecular Systems

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华南师范大学学报(自然科学版) 2014年第6期 136-137页

作者： Yan Yun’an Guizhou Provincial Key Laboratory of Computational Nano-material Science Guizhou Normal College

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with

关键词： seebeck In Exciton seebeck in Molecular Systems

Realizing ultrahigh average figure of merit through manipulating layered phonon-electron decoupling

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Science China Materials 2022年第7期65卷 1987-1988页

作者： Zizhen Zhou Xiaoyuan Zhou Center of Quantum Materials and Devices College of PhysicsChongqing UniversityChongqing 401331China

Developing advanced thermoelectric materials for waste heat recovery is a promising strategy to meet the growing energy demand and low-carbon economy [1].The thermoelectric performance is evaluated by the dimensionles... 详细信息

关键词： ultrahigh seebeck phonon

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磁学与热电学的交叉探索

Science Bulletin 2022年第9期67卷 891-894,M0003页

作者： Cuncheng Li Wenyu Zhao Qingjie Zhang State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Thermoelectrics have important applications in power generation and refrigeration through the direct energy conversion between heat and electricity.The performance of thermoelectric(TE)materials can be qualified by dimensionless figure of merit ZT=σa2/κ,whereσ,a andκare the electrical conductivity,seebeck coefficient and thermal conductivity,respectively.

关键词： conductivity seebeck electrical

弱磁场下（BiPb）2Sr2Ca2Cu3Oy的seebeck效应

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低温物理学报 1994年第6期16卷 458-461页

作者：王瑞平查伟陈琦陈兆甲中国科学技术大学物理系

在８０—１２０Ｋ温区内测量了（ＢｉＰｂ）２Ｓｒ２Ｃａ２Ｃｕ２Ｏｙ、（ＢｉＰｂ）２Ｓｒ２Ｃａ２Ｃｕ３ＯｙＦｘ样品在混合态下的Ｓｅｅｂｅｃｋ效应，结果表明，与传统超导体不同，磁通线的运动并不是引起高温超导体磁场下Ｓｅｅｂ... 详细信息

在８０—１２０Ｋ温区内测量了（ＢｉＰｂ）２Ｓｒ２Ｃａ２Ｃｕ２Ｏｙ、（ＢｉＰｂ）２Ｓｒ２Ｃａ２Ｃｕ３ＯｙＦｘ样品在混合态下的Ｓｅｅｂｅｃｋ效应，结果表明，与传统超导体不同，磁通线的运动并不是引起高温超导体磁场下Ｓｅｅｂｅｃｋ效应的唯一因素，样品掺Ｆ可改变磁通钉扎状态．

关键词：弱磁场混合态 seebeck BiPb 涡旋态(超导电性) 超导态传统超导体

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熵稳定热电材料

Science Bulletin 2023年第13期68卷 1346-1349页

作者：江彬彬唐琦琪王戊何佳清 Shenzhen Institute for Advanced Study University of Electronic Science and Technology of ChinaShenzhen 518110China School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731China Shenzhen Key Laboratory of Thermoelectric Materials Department of PhysicsSouthern University of Science and TechnologyShenzhen 518055China

Thermoelectric technologies,which generate electricity directly from waste heat,have received considerable attention because of their potential to improve overall energy efficiency[1].The energy conversion efficiency is evaluated by a dimensionless figure-of-merit,defined as ZT=α^(2)σT/κ,whereα,σ,T,andκare the seebeck coefficient,electrical conductivity,absolute temperature,and thermal conductivity,respectively.

关键词：热电材料 conductivity seebeck