Eight new high-temperature superconductors with the 1:2:4 structure

Donald E. Morris, Janice H. Nickel, John Y.T. Wei, Naggi G. Asmar, Jeffrey S. Scott, Ulrich M. Scheven, Charles T. Hultgren, Andrea G. Markelz, Jeffrey E. Post, Peter J. Heaney, David R. Veblen, Robert M. Hazen

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Abstract

New high-temperature superconducting compounds RBa2Cu4O8 (R=Nd, Sm, Eu, Gd, Dy, Ho, Er, and Tm) which share the 1:2:4 structure of YBa2Cu4O8 are bulk synthesized using a new high-pressure oxygen technique. All compounds show substantial Meissner diamagnetism [(325)×10-4 emu/g at 20 K]. Critical temperatures (5781 K) vary inversely with ion size (opposite to 1:2:3), and directly with orthorhombic distortion (which is much smaller than in corresponding 1:2:3 compounds). R2Ba4Cu7Ox compounds (with alternating blocks of 1:2:3: and 1:2:4) were also prepared. The variable oxygen stoichiometry of 1:2:3 is not shared by the 1:2:4 compounds.

Original languageEnglish (US)
Pages (from-to)7347-7350
Number of pages4
JournalPhysical Review B
Volume39
Issue number10
DOIs
StatePublished - Jan 1 1989

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high pressure oxygen
diamagnetism
high temperature superconductors
stoichiometry
critical temperature
oxygen
ions

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics

Cite this

Morris, D. E., Nickel, J. H., Wei, J. Y. T., Asmar, N. G., Scott, J. S., Scheven, U. M., ... Hazen, R. M. (1989). Eight new high-temperature superconductors with the 1:2:4 structure. Physical Review B, 39(10), 7347-7350. https://doi.org/10.1103/PhysRevB.39.7347
Morris, Donald E. ; Nickel, Janice H. ; Wei, John Y.T. ; Asmar, Naggi G. ; Scott, Jeffrey S. ; Scheven, Ulrich M. ; Hultgren, Charles T. ; Markelz, Andrea G. ; Post, Jeffrey E. ; Heaney, Peter J. ; Veblen, David R. ; Hazen, Robert M. / Eight new high-temperature superconductors with the 1:2:4 structure. In: Physical Review B. 1989 ; Vol. 39, No. 10. pp. 7347-7350.
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Morris, DE, Nickel, JH, Wei, JYT, Asmar, NG, Scott, JS, Scheven, UM, Hultgren, CT, Markelz, AG, Post, JE, Heaney, PJ, Veblen, DR & Hazen, RM 1989, 'Eight new high-temperature superconductors with the 1:2:4 structure', Physical Review B, vol. 39, no. 10, pp. 7347-7350. https://doi.org/10.1103/PhysRevB.39.7347

Eight new high-temperature superconductors with the 1:2:4 structure. / Morris, Donald E.; Nickel, Janice H.; Wei, John Y.T.; Asmar, Naggi G.; Scott, Jeffrey S.; Scheven, Ulrich M.; Hultgren, Charles T.; Markelz, Andrea G.; Post, Jeffrey E.; Heaney, Peter J.; Veblen, David R.; Hazen, Robert M.

In: Physical Review B, Vol. 39, No. 10, 01.01.1989, p. 7347-7350.

Research output: Contribution to journalArticle

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Morris DE, Nickel JH, Wei JYT, Asmar NG, Scott JS, Scheven UM et al. Eight new high-temperature superconductors with the 1:2:4 structure. Physical Review B. 1989 Jan 1;39(10):7347-7350. https://doi.org/10.1103/PhysRevB.39.7347