Neutron scattering study of charge-ordering in R1/3Sr2/3FeO3 (R=La, Pr, Nd, Sm, and Y)

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The complicated physical phenomena in complex transition-metal oxides (TMO), such as high T<sub>c</sub> superconductivity, colossal magnetoresistivity, metal-insulator transitions, etc., have long been the focus of intense inquiry and debate in condensed matter science, since they are related to strong electronic correlations and cannot be explained within the 'standard model' of solid state physics. These novel functionalities of the correlated electron systems have a wide range of potential for applications in industry, such as information storage, energy transportation, and so on. The charge-ordering (CO) transition is very common in TMO and there is a specific CO transition temperature, TCO. Above TCO, ... continued below

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236 p.

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Ma, Jie January 1, 2010.

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  • Ma, Jie Iowa State Univ., Ames, IA (United States)

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  • Ames Laboratory
    Publisher Info: Ames Laboratory (AMES), Ames, IA (United States)
    Place of Publication: Ames, Iowa

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Description

The complicated physical phenomena in complex transition-metal oxides (TMO), such as high T<sub>c</sub> superconductivity, colossal magnetoresistivity, metal-insulator transitions, etc., have long been the focus of intense inquiry and debate in condensed matter science, since they are related to strong electronic correlations and cannot be explained within the 'standard model' of solid state physics. These novel functionalities of the correlated electron systems have a wide range of potential for applications in industry, such as information storage, energy transportation, and so on. The charge-ordering (CO) transition is very common in TMO and there is a specific CO transition temperature, TCO. Above TCO, the charge is not ordered, which means that the electrons in a compound are itinerant and the positions of the electrons are not fixed. Below TCO, the charge is ordered, which means that the electrons are localized and the positions of the electrons are settled. Hence, the electrical conductivity of a material is changed at TCO and this transition is classified as metal-insulator transition. Usually the CO with commensurate hole doping in TMO is thought to play an important role in various cases, including the superconducting cuprates, where the spin/charge stripe formation competes with superconducting states, colossal magnetoresistive manganites, where CO competes with ferromagnetic metallic state stabilized by an external magnetic field, layered nickelates, where CO takes the form of the small polaron lattices, and layered manganites, where CO could be bothered by the correlated dynamics of spins and charges. Therefore understanding the causes and implications of CO phenomena is significantly important.

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236 p.

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  • Report No.: IS--T 2635
  • Grant Number: AC02-07CH11358
  • DOI: 10.2172/985162 | External Link
  • Office of Scientific & Technical Information Report Number: 985162
  • Archival Resource Key: ark:/67531/metadc1015484

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • January 1, 2010

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  • Oct. 14, 2017, 8:36 a.m.

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  • Nov. 2, 2017, 3:08 p.m.

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Ma, Jie. Neutron scattering study of charge-ordering in R1/3Sr2/3FeO3 (R=La, Pr, Nd, Sm, and Y), thesis or dissertation, January 1, 2010; Ames, Iowa. (digital.library.unt.edu/ark:/67531/metadc1015484/: accessed January 22, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.