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

doi:10.1103/PhysRevB.39.7347

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

Physics

Lawrence Berkeley National Laboratory
Smithsonian Institution
Johns Hopkins University
Carnegie Institution of Washington

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

241 Scopus citations

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 language	English
Pages (from-to)	7347-7350
Number of pages	4
Journal	Physical Review B-Condensed Matter
Volume	39
Issue number	10
DOIs	https://doi.org/10.1103/PhysRevB.39.7347
State	Published - 1989

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10.1103/PhysRevB.39.7347

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title = "Eight new high-temperature superconductors with the 1:2:4 structure",

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.",

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

year = "1989",

doi = "10.1103/PhysRevB.39.7347",

language = "English",

volume = "39",

pages = "7347--7350",

journal = "Physical Review B-Condensed Matter",

issn = "0163-1829",

publisher = "American Institute of Physics",

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TY - JOUR

T1 - Eight new high-temperature superconductors with the 1:2:4 structure

AU - Morris, Donald E.

AU - Nickel, Janice H.

AU - Wei, John Y.T.

AU - Asmar, Naggi G.

AU - Scott, Jeffrey S.

AU - Scheven, Ulrich M.

AU - Hultgren, Charles T.

AU - Markelz, Andrea G.

AU - Post, Jeffrey E.

AU - Heaney, Peter J.

AU - Veblen, David R.

AU - Hazen, Robert M.

PY - 1989

Y1 - 1989

N2 - 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.

AB - 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.

UR - https://www.scopus.com/pages/publications/0001201173

U2 - 10.1103/PhysRevB.39.7347

DO - 10.1103/PhysRevB.39.7347

M3 - Article

AN - SCOPUS:0001201173

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EP - 7350

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

IS - 10

ER -

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

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