Superconductivity and magnetic order in RBa2Cu3Oz

I. Nowik; M. Kowitt; I. Felner; E. R. Bauminger

doi:10.1007/BF02407693

Superconductivity and magnetic order in RBa₂Cu₃O_z

I. Nowik^*, M. Kowitt, I. Felner, E. R. Bauminger

^*Corresponding author for this work

Racah Institute of Physics

Research output: Contribution to journal › Article › peer-review

Abstract

Mössbauer studies of⁵⁷Fe in RBa_2-yK_y (Cu_1-xFe_x)₃O_z, with R=Y and Pr;y=0 and 0.5;x=0.01, 0.05 and 0.1 and z between 5.9 and 7.1, have been performed. A minority of the iron ions enter the Cu(2) site and reveal its magnetic order. In nonsuperconducting YBa_1.5K_0.5(Cu_0.95Fe_0.05)₃O_6.1 two distinctly inequivalent magnetic iron sites are observed, probably corresponding to iron in the Cu(2) site with different Ba-K neighbours. In superconducting (T_c=60 K) YBa_1.5K_0.5(Cu_0.95Fe_0.05)₃O_6.5 one Cu(2) subsite remains magnetic (T_N=440 K). The implications of these findings on the valencies of the Cu ions are discussed.

Original language	English
Pages (from-to)	575-579
Number of pages	5
Journal	Hyperfine Interactions
Volume	50
Issue number	1-4
DOIs	https://doi.org/10.1007/BF02407693
State	Published - Jun 1989

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title = "Superconductivity and magnetic order in RBa2Cu3Oz",

abstract = "M{\"o}ssbauer studies of57Fe in RBa2-yKy (Cu1-xFex)3Oz, with R=Y and Pr;y=0 and 0.5;x=0.01, 0.05 and 0.1 and z between 5.9 and 7.1, have been performed. A minority of the iron ions enter the Cu(2) site and reveal its magnetic order. In nonsuperconducting YBa1.5K0.5(Cu0.95Fe0.05)3O6.1 two distinctly inequivalent magnetic iron sites are observed, probably corresponding to iron in the Cu(2) site with different Ba-K neighbours. In superconducting (Tc=60 K) YBa1.5K0.5(Cu0.95Fe0.05)3O6.5 one Cu(2) subsite remains magnetic (TN=440 K). The implications of these findings on the valencies of the Cu ions are discussed.",

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AU - Nowik, I.

AU - Kowitt, M.

AU - Felner, I.

AU - Bauminger, E. R.

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N2 - Mössbauer studies of57Fe in RBa2-yKy (Cu1-xFex)3Oz, with R=Y and Pr;y=0 and 0.5;x=0.01, 0.05 and 0.1 and z between 5.9 and 7.1, have been performed. A minority of the iron ions enter the Cu(2) site and reveal its magnetic order. In nonsuperconducting YBa1.5K0.5(Cu0.95Fe0.05)3O6.1 two distinctly inequivalent magnetic iron sites are observed, probably corresponding to iron in the Cu(2) site with different Ba-K neighbours. In superconducting (Tc=60 K) YBa1.5K0.5(Cu0.95Fe0.05)3O6.5 one Cu(2) subsite remains magnetic (TN=440 K). The implications of these findings on the valencies of the Cu ions are discussed.

AB - Mössbauer studies of57Fe in RBa2-yKy (Cu1-xFex)3Oz, with R=Y and Pr;y=0 and 0.5;x=0.01, 0.05 and 0.1 and z between 5.9 and 7.1, have been performed. A minority of the iron ions enter the Cu(2) site and reveal its magnetic order. In nonsuperconducting YBa1.5K0.5(Cu0.95Fe0.05)3O6.1 two distinctly inequivalent magnetic iron sites are observed, probably corresponding to iron in the Cu(2) site with different Ba-K neighbours. In superconducting (Tc=60 K) YBa1.5K0.5(Cu0.95Fe0.05)3O6.5 one Cu(2) subsite remains magnetic (TN=440 K). The implications of these findings on the valencies of the Cu ions are discussed.

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Superconductivity and magnetic order in RBa₂Cu₃O_z

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