New magnetic phase diagram of (Sr,Ca)2 RuO4

J. P. Carlo; T. Goko; I. M. Gat-Malureanu; P. L. Russo; A. T. Savici; A. A. Aczel; G. J. MacDougall; J. A. Rodriguez; T. J. Williams; G. M. Luke; C. R. Wiebe; Y. Yoshida; S. Nakatsuji; Y. Maeno; T. Taniguchi; Y. J. Uemura

doi:10.1038/nmat3236

New magnetic phase diagram of (Sr,Ca)₂ RuO₄

J. P. Carlo, T. Goko, I. M. Gat-Malureanu, P. L. Russo, A. T. Savici, A. A. Aczel, G. J. MacDougall, J. A. Rodriguez, T. J. Williams, G. M. Luke, C. R. Wiebe, Y. Yoshida, S. Nakatsuji, Y. Maeno, T. Taniguchi, Y. J. Uemura

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

Abstract

High-T _c cuprates, iron pnictides, organic BEDT and TMTSF, alkali-doped C ₆₀, and heavy-fermion systems have superconducting states adjacent to competing states exhibiting static antiferromagnetic or spin density wave order. This feature has promoted pictures for their superconducting pairing mediated by spin fluctuations. Sr ₂RuO ₄ is another unconventional superconductor which almost certainly has a p-wave pairing. The absence of known signatures of static magnetism in the Sr-rich side of the (Ca, Sr) substitution space, however, has led to a prevailing view that the superconducting state in Sr ₂RuO ₄ emerges from a surrounding Fermi-liquid metallic state. Using muon spin relaxation and magnetic susceptibility measurements, we demonstrate here that (Sr,Ca) ₂RuO ₄ has a ground state with static magnetic order over nearly the entire range of (Ca, Sr) substitution, with spin-glass behaviour in Sr _1.5Ca _0.5RuO ₄ and Ca _1.5Sr _0.5RuO ₄. The resulting new magnetic phase diagram establishes the proximity of superconductivity in Sr ₂RuO ₄ to competing static magnetic order.

Original language	English (US)
Pages (from-to)	323-328
Number of pages	6
Journal	Nature Materials
Volume	11
Issue number	4
DOIs	https://doi.org/10.1038/nmat3236
State	Published - Apr 2012
Externally published	Yes

ASJC Scopus subject areas

General Chemistry
General Materials Science
Condensed Matter Physics
Mechanics of Materials
Mechanical Engineering

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10.1038/nmat3236

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Cite this

@article{977120c97eea428a9a188711c3ff2eda,

title = "New magnetic phase diagram of (Sr,Ca)2 RuO4",

abstract = "High-T c cuprates, iron pnictides, organic BEDT and TMTSF, alkali-doped C 60, and heavy-fermion systems have superconducting states adjacent to competing states exhibiting static antiferromagnetic or spin density wave order. This feature has promoted pictures for their superconducting pairing mediated by spin fluctuations. Sr 2RuO 4 is another unconventional superconductor which almost certainly has a p-wave pairing. The absence of known signatures of static magnetism in the Sr-rich side of the (Ca, Sr) substitution space, however, has led to a prevailing view that the superconducting state in Sr 2RuO 4 emerges from a surrounding Fermi-liquid metallic state. Using muon spin relaxation and magnetic susceptibility measurements, we demonstrate here that (Sr,Ca) 2RuO 4 has a ground state with static magnetic order over nearly the entire range of (Ca, Sr) substitution, with spin-glass behaviour in Sr 1.5Ca 0.5RuO 4 and Ca 1.5Sr 0.5RuO 4. The resulting new magnetic phase diagram establishes the proximity of superconductivity in Sr 2RuO 4 to competing static magnetic order.",

author = "Carlo, {J. P.} and T. Goko and Gat-Malureanu, {I. M.} and Russo, {P. L.} and Savici, {A. T.} and Aczel, {A. A.} and MacDougall, {G. J.} and Rodriguez, {J. A.} and Williams, {T. J.} and Luke, {G. M.} and Wiebe, {C. R.} and Y. Yoshida and S. Nakatsuji and Y. Maeno and T. Taniguchi and Uemura, {Y. J.}",

note = "Funding Information: This work has been supported by the US National Science Foundation (NSF) under the Materials World Network (MWN: DMR-0502706 and 0806846), the Partnership for International Research and Education (PIRE: OISE-0968226) and DMR-1105961 programs at Columbia, by the Canadian Natural Sciences and Engineering Research Council (NSERC) and the Canadian Institute for Advanced Research (CIFAR) at McMaster, and by Grants-in-Aid (No. 21684019) from the Japan Society for the Promotion of Science (JSPS) and (No. 19052003) for Scientific Research on Priority Areas (SRPA) from the Ministry of Education, Culture, Sports, Science and Technology (MEXT) at Kyoto and Tokyo Universities, and by MEXT-SRPA (No. 19052006) at Osaka University.",

year = "2012",

month = apr,

doi = "10.1038/nmat3236",

language = "English (US)",

volume = "11",

pages = "323--328",

journal = "Nature Materials",

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TY - JOUR

T1 - New magnetic phase diagram of (Sr,Ca)2 RuO4

AU - Carlo, J. P.

AU - Goko, T.

AU - Gat-Malureanu, I. M.

AU - Russo, P. L.

AU - Savici, A. T.

AU - Aczel, A. A.

AU - MacDougall, G. J.

AU - Rodriguez, J. A.

AU - Williams, T. J.

AU - Luke, G. M.

AU - Wiebe, C. R.

AU - Yoshida, Y.

AU - Nakatsuji, S.

AU - Maeno, Y.

AU - Taniguchi, T.

AU - Uemura, Y. J.

N1 - Funding Information: This work has been supported by the US National Science Foundation (NSF) under the Materials World Network (MWN: DMR-0502706 and 0806846), the Partnership for International Research and Education (PIRE: OISE-0968226) and DMR-1105961 programs at Columbia, by the Canadian Natural Sciences and Engineering Research Council (NSERC) and the Canadian Institute for Advanced Research (CIFAR) at McMaster, and by Grants-in-Aid (No. 21684019) from the Japan Society for the Promotion of Science (JSPS) and (No. 19052003) for Scientific Research on Priority Areas (SRPA) from the Ministry of Education, Culture, Sports, Science and Technology (MEXT) at Kyoto and Tokyo Universities, and by MEXT-SRPA (No. 19052006) at Osaka University.

PY - 2012/4

Y1 - 2012/4

N2 - High-T c cuprates, iron pnictides, organic BEDT and TMTSF, alkali-doped C 60, and heavy-fermion systems have superconducting states adjacent to competing states exhibiting static antiferromagnetic or spin density wave order. This feature has promoted pictures for their superconducting pairing mediated by spin fluctuations. Sr 2RuO 4 is another unconventional superconductor which almost certainly has a p-wave pairing. The absence of known signatures of static magnetism in the Sr-rich side of the (Ca, Sr) substitution space, however, has led to a prevailing view that the superconducting state in Sr 2RuO 4 emerges from a surrounding Fermi-liquid metallic state. Using muon spin relaxation and magnetic susceptibility measurements, we demonstrate here that (Sr,Ca) 2RuO 4 has a ground state with static magnetic order over nearly the entire range of (Ca, Sr) substitution, with spin-glass behaviour in Sr 1.5Ca 0.5RuO 4 and Ca 1.5Sr 0.5RuO 4. The resulting new magnetic phase diagram establishes the proximity of superconductivity in Sr 2RuO 4 to competing static magnetic order.

AB - High-T c cuprates, iron pnictides, organic BEDT and TMTSF, alkali-doped C 60, and heavy-fermion systems have superconducting states adjacent to competing states exhibiting static antiferromagnetic or spin density wave order. This feature has promoted pictures for their superconducting pairing mediated by spin fluctuations. Sr 2RuO 4 is another unconventional superconductor which almost certainly has a p-wave pairing. The absence of known signatures of static magnetism in the Sr-rich side of the (Ca, Sr) substitution space, however, has led to a prevailing view that the superconducting state in Sr 2RuO 4 emerges from a surrounding Fermi-liquid metallic state. Using muon spin relaxation and magnetic susceptibility measurements, we demonstrate here that (Sr,Ca) 2RuO 4 has a ground state with static magnetic order over nearly the entire range of (Ca, Sr) substitution, with spin-glass behaviour in Sr 1.5Ca 0.5RuO 4 and Ca 1.5Sr 0.5RuO 4. The resulting new magnetic phase diagram establishes the proximity of superconductivity in Sr 2RuO 4 to competing static magnetic order.

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