Role of intergrowths in the properties of the naturally layered manganites.

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The structural and magnetic properties of the two-layered Ruddlesden-Popper phase SrO(La{sub 1{minus}x}Sr{sub x}MnO{sub 3}){sub 2} with x = 0.3 and x = 0.4 are investigated. These naturally layered manganites exhibit a colossal magnetoresistance, a magnetic anisotropy which is strongly composition-dependent, almost no remanence, and a non-vanishing magnetization in an extended temperature range above the Curie temperature (T{sub c}). The magnetization in this temperature range is not intrinsic to the crystal, but is attributed to intergrowths. These two-dimensional lattice imperfections consist of additional or missing SrO layers and have been observed in transmission electron micrographs. The magnetic properties of the intergrowths ... continued below

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28 p.

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Bader, S.D.; Berger, A.; Jiang, J.S.; Miller, D.J.; Mitchell, J.F. & Osgood, R.M. III October 27, 1998.

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The structural and magnetic properties of the two-layered Ruddlesden-Popper phase SrO(La{sub 1{minus}x}Sr{sub x}MnO{sub 3}){sub 2} with x = 0.3 and x = 0.4 are investigated. These naturally layered manganites exhibit a colossal magnetoresistance, a magnetic anisotropy which is strongly composition-dependent, almost no remanence, and a non-vanishing magnetization in an extended temperature range above the Curie temperature (T{sub c}). The magnetization in this temperature range is not intrinsic to the crystal, but is attributed to intergrowths. These two-dimensional lattice imperfections consist of additional or missing SrO layers and have been observed in transmission electron micrographs. The magnetic properties of the intergrowths differ from the bulk crystal which results in unusual magnetic behavior.

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28 p.

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OSTI as DE00012392

Medium: P; Size: 28 pages

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  • 7th NEC Symposium on Fundamental Approaches to New Material Phases, Nasu (JP), 10/11/1998--10/15/1998

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  • Report No.: ANL/MSD/CP-97231
  • Grant Number: W-31109-ENG-38
  • Office of Scientific & Technical Information Report Number: 12392
  • Archival Resource Key: ark:/67531/metadc624351

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  • October 27, 1998

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  • June 16, 2015, 7:43 a.m.

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  • April 10, 2017, 6:58 p.m.

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Bader, S.D.; Berger, A.; Jiang, J.S.; Miller, D.J.; Mitchell, J.F. & Osgood, R.M. III. Role of intergrowths in the properties of the naturally layered manganites., article, October 27, 1998; Illinois. (digital.library.unt.edu/ark:/67531/metadc624351/: accessed October 16, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.