Phase Transitions in Magnetite and Nickel Sulphide-Selenide Systems
Phase Transitions in Magnetite and Nickel Sulphide-Selenide Systems
批准号:
9222986
负责人:
Jurgen Honig
金额:
$45.02万
依托单位国家:
美国
项目类别:
Continuing Grant
财政年份:
1993
资助国家:
美国
项目状态:
已结题
起止时间:
1993-05-15 至 1997-04-30
中文摘要
这项研究集中在两个项目上。 第一部分涉及 继续研究磁铁矿和锌铁氧体。 主旨 这项研究的目的是调查镍 硫化物-硒化物系统。 这种材料表现出一种 良好绝缘体、良好金属或金属-绝缘体,x值为 0、2和0.5。 这一特性大概是由 电子相关效应 系统可以通过以下方式进行研究: 改变硫化物/硒化物比率,同时保留阳离子 亚晶格完整 计划开展以下研究: 单晶,然后调整化学计量, 电气测量、磁化研究、特定 热研究、结构研究和光学测量。 的 数据采集不仅是一种内在的兴趣, 用于识别从绝缘状态到 窄带关联态到金属绝缘跃迁 制度,并进入良好的金属行为,在此期间, 晶格基本上保持不变。 因此,数据可以作为 测试电子传输的各种现行理论 政权。
英文摘要
This research is focussed on two projects. The first part involves continued studies on magnetites and zinc-ferrites. The main thrust of this research is directed to the investigation of nickel sulphide-selenide systems. This material exhibits properties of a good insulator, a good metal, or a metal-insulator for x values of 0, 2, and 0.5, respectively. This property presumably is driven by electron correlation effects. The systems can be studied by varying the sulphide/selenide ratio while leaving the cation sublattice intact. The following studies are planned: growth of single crystals, followed by adjustments of stoichiometry, electrical measurements, magnetization investigations, specific heat studies, structural research, and optical measurements. The data acquisition is not just of intrinsic interest but is to be used to identify the changeover from the insulating state, through a narrow band correlated state, to the metal-insulated transition regime, and into the region of good metallic behavior, during which the lattice remains basically unaltered. The data thus serve as a test for current theories of electron transport in the various regimes.
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Electron Correlation Effects in the Nickel-Sulfide-Selinide System
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批准号:9612130
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项目类别:Continuing Grant
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资助金额:$40.5万
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财政年份:1997
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负责人:Jurgen Honig
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依托单位:
Proposal for Convening a Planning Committee to Institute a Workshop on Solid State Chemistry and Materials
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批准号:9707320
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项目类别:Standard Grant
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资助金额:$1.1万
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财政年份:1997
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负责人:Jurgen Honig
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依托单位:
Workshop on the Present Status and Future Direction of Solid State Chemistry and Materials: NSF; Arlington, VA; January 15-16, 1998
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批准号:9730689
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项目类别:Continuing Grant
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资助金额:$5.32万
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财政年份:1997
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负责人:Jurgen Honig
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依托单位:
US-Poland Cooperative Research on Effect of Strong Correlations and Disorder on Electron States and Phase Transitions in Vanadium Sesquioxides
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批准号:9308323
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项目类别:Standard Grant
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资助金额:$3.0万
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财政年份:1993
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负责人:Jurgen Honig
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依托单位:
INDO/US Collaborative Research on Novel Oxide Materials, Award in Indian and U.S. Currency
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批准号:9204467
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项目类别:Continuing Grant
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资助金额:$48.41万
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财政年份:1992
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负责人:Jurgen Honig
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依托单位:
Consultation on joint project at Indian Institute of Sciencea Presentation of talk at Bangalore, Madras, and Sri Lanka, Award in Indian Currency.
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批准号:9111441
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项目类别:Standard Grant
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资助金额:$5.1万
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财政年份:1991
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负责人:Jurgen Honig
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依托单位:
Phase Transitions, Magnetic, and Electrical Properties in Iron-Oxide, Zinc Ferrite, and Titanomagnetite
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批准号:8921293
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项目类别:Continuing Grant
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资助金额:$40.39万
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财政年份:1990
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负责人:Jurgen Honig
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依托单位:
Research on Novel Oxide Materials, Indo-U.S. Collaboration
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批准号:8903183
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项目类别:Continuing Grant
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资助金额:$2.18万
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财政年份:1989
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负责人:Jurgen Honig
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依托单位:
Titanomagnetite and Zinc Ferrite Solutions
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批准号:8616533
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项目类别:Continuing Grant
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资助金额:$37.17万
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财政年份:1987
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负责人:Jurgen Honig
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依托单位:
Physical Properties of Magnetite-Titanomagnetite Solid Solutions (Materials Research)
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批准号:8402864
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项目类别:Continuing Grant
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资助金额:$29.01万
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财政年份:1984
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负责人:Jurgen Honig
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依托单位:
SFC Award (in Indian and U.S. Currency) for Collaborative Reseach on Novel Oxide Materials
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批准号:8312855
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项目类别:Standard Grant
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资助金额:$3.58万
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财政年份:1984
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负责人:Jurgen Honig
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依托单位:
Sfc Award (In Indian Currency and U. S. Dollars) For a Workshop on Preparation and Characterization of Materials ToBe Held in India in Early 1981
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批准号:8023689
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项目类别:Standard Grant
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资助金额:$4.99万
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财政年份:1981
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负责人:Jurgen Honig
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依托单位:
Properties of Titanomagnetite Solid Solutions
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批准号:8103041
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项目类别:Continuing Grant
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资助金额:$21.42万
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财政年份:1981
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负责人:Jurgen Honig
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依托单位:
Nonequilibrium Properties of Metal Oxides
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批准号:7906886
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项目类别:Standard Grant
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资助金额:$3.05万
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财政年份:1979
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负责人:Jurgen Honig
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依托单位:
Materials Research Laboratory
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批准号:7723798
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项目类别:Continuing Grant
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资助金额:$331.0万
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财政年份:1978
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负责人:Jurgen Honig
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依托单位:
Nonequilibrium Properties of Metal Oxides
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批准号:7612583
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项目类别:Continuing Grant
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资助金额:$12.91万
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财政年份:1976
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负责人:Jurgen Honig
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依托单位:
Materials Research Laboratories
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批准号:7600889
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项目类别:Standard Grant
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资助金额:$184.96万
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财政年份:1976
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负责人:Jurgen Honig
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依托单位:
Materials Research Laboratories Program
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批准号:7203018
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项目类别:Standard Grant
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资助金额:$315.5万
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财政年份:1972
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负责人:Jurgen Honig
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依托单位:
Electrical Properties of Single Crystal Nio and Nbo
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批准号:7203075
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项目类别:Standard Grant
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资助金额:$7.81万
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财政年份:1972
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负责人:Jurgen Honig
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依托单位:
海外基金