Superconductivity and structure in La{sub 2{minus}x}M{sub x}CuO{sub 4}, M=Ba, Sr, and (Nd,Sr)

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The identification of charge stripes in La{sub 2{minus}x{minus}y}Nd{sub y}Sr{sub x}CuO{sub 4} (Nd-214) has reenergized research on the original high transition temperature {Tc} superconductor, La{sub 2{minus}x}Ba{sub x}CuO{sub 4} (Ba-214), and related compounds. Early in the study of Ba-214, a low temperature phase transition was associated with changes in electrical properties. An apparent suppression of {Tc} near Ba x=0.125, was initially associated with a first order low temperature phase transformation. However, it was later shown that only very near Ba x=0.125 was {Tc} reduced markedly, and that the relationship between crystal structure and {Tc} is more complicated. This review well describe the ... continued below

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23 pages

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Moodenbaugh, A. R. January 21, 2000.

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Description

The identification of charge stripes in La{sub 2{minus}x{minus}y}Nd{sub y}Sr{sub x}CuO{sub 4} (Nd-214) has reenergized research on the original high transition temperature {Tc} superconductor, La{sub 2{minus}x}Ba{sub x}CuO{sub 4} (Ba-214), and related compounds. Early in the study of Ba-214, a low temperature phase transition was associated with changes in electrical properties. An apparent suppression of {Tc} near Ba x=0.125, was initially associated with a first order low temperature phase transformation. However, it was later shown that only very near Ba x=0.125 was {Tc} reduced markedly, and that the relationship between crystal structure and {Tc} is more complicated. This review well describe the low temperature crystal structures and microstructures, as well as the superconducting properties as determined from low field (1-100G) dc magnetometer measurements for Ba-214, Nd-214, and La{sub 2{minus}x}Sr{sub x}CuO{sub 4} (Sr-214). The authors will also describe some work in the related La{sub 2{minus}x}Ca{sub x}CuO{sub 4} (Ca-214). A basic knowledge of the interactions among superconductivity and low temperature phases will allow one to better understand the significance of the underlying charge stripe phases.

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23 pages

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  • Other Information: Chapter in book: Studies of High Temperature Superconductors: Advances in Research and Applications. Editor: Narlikar, A.V., NOVA

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  • Report No.: BNL--67128
  • Report No.: KC020103
  • Grant Number: AC02-98CH10886
  • Office of Scientific & Technical Information Report Number: 755024
  • Archival Resource Key: ark:/67531/metadc709647

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  • January 21, 2000

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  • Sept. 12, 2015, 6:31 a.m.

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  • Nov. 9, 2015, 4:21 p.m.

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Moodenbaugh, A. R. Superconductivity and structure in La{sub 2{minus}x}M{sub x}CuO{sub 4}, M=Ba, Sr, and (Nd,Sr), book, January 21, 2000; Upton, New York. (digital.library.unt.edu/ark:/67531/metadc709647/: accessed August 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.