Magnetic interactions in sup 119 Sn substituted for Cu in antiferromagnetic and superconducting lamellar cuprates

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Moessbauer Spectroscopy (MS) studies of {sup 119}Sn were carried out in antiferromagnetic La{sub 2}(Cu{sub 0.99}Sn{sub 0.01})O{sub 4} (214) and in superconducting GdBa{sub 2}(Cu{sub 0.99}Sn{sub 0. 01}){sub 3}O{sub 7} (123). Non-magnetic Sn{sup 4+} substitutes for Cu if the right procedure for diffusing {sup 119}SnO{sub 2} in CuO is carried out. Studies performed in 214 show a large quadrupole splitting (QS) down to 120 K followed by an onset of a magnetic interaction reaching a saturation internal field of H{sub eff} = 8.7(5) KOe at T = 30 K. From the combined magnetic-quadrupole interaction the angle {theta} formed by q{sub zz} and ... continued below

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Pasternak, M. & Taylor, R. D. November 9, 1989.

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Moessbauer Spectroscopy (MS) studies of {sup 119}Sn were carried out in antiferromagnetic La{sub 2}(Cu{sub 0.99}Sn{sub 0.01})O{sub 4} (214) and in superconducting GdBa{sub 2}(Cu{sub 0.99}Sn{sub 0. 01}){sub 3}O{sub 7} (123). Non-magnetic Sn{sup 4+} substitutes for Cu if the right procedure for diffusing {sup 119}SnO{sub 2} in CuO is carried out. Studies performed in 214 show a large quadrupole splitting (QS) down to 120 K followed by an onset of a magnetic interaction reaching a saturation internal field of H{sub eff} = 8.7(5) KOe at T = 30 K. From the combined magnetic-quadrupole interaction the angle {theta} formed by q{sub zz} and H{sub eff}, the {eta}-parameter, and the sign of QS were deduced and information on the local spin structure is derived. Studies conducted with the 123 material (T{sub c} = 90 K) reveal a broad unsplit line at temperatures down to 60 K followed by an abrupt onset of a magnetic interaction corresponding to H{sub eff} (Sn) = 8.3 (7) KOe. The hyperfine field decreases with decreasing temperature reaching 6.0(1) KOe at 16 K. The onset of the magnetic interaction at the {sup 119}Sn nucleus is explained as due to a local depletion of holes following the Sn{sup 4+} doping and a consequent quenching of the magnetic fluctuations in its vicinity. 5 refs., 5 figs.

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Pages: (16 p)

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NTIS, PC A03/MF A01 - OSTI; GPO Dep.

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  • International conference on the applications of the Mossbauer effect (ICAME '89), Budapest (Hungary), 4-8 Sep 1989

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  • Other: DE90003661
  • Report No.: LA-UR-89-3883
  • Report No.: CONF-890933--5
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 5216235
  • Archival Resource Key: ark:/67531/metadc1065068

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  • November 9, 1989

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  • Feb. 4, 2018, 10:51 a.m.

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  • May 23, 2018, 2:11 p.m.

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Pasternak, M. & Taylor, R. D. Magnetic interactions in sup 119 Sn substituted for Cu in antiferromagnetic and superconducting lamellar cuprates, article, November 9, 1989; New Mexico. (https://digital.library.unt.edu/ark:/67531/metadc1065068/: accessed April 21, 2019), University of North Texas Libraries, Digital Library, https://digital.library.unt.edu; crediting UNT Libraries Government Documents Department.