Pressure-induced tetragonal-orthorhombic phase transitions in CeRuPO

S. Hirai; Y. Kamihara; A. Wakatsuki; M. Matoba; W. L. Mao

doi:10.1063/1.4791690

Pressure-induced tetragonal-orthorhombic phase transitions in CeRuPO

S. Hirai, Y. Kamihara, A. Wakatsuki, M. Matoba, W. L. Mao

Department of Applied Physics and Physico-Informatics

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

2 Citations (Scopus)

Abstract

CeRuPO, a ferromagnetic Kondo lattice, undergoes two novel pressure-induced structural phase transitions. CeRuPO undergoes an isostructural transition to a collapsed tetragonal structure near 7.5 GPa. Since pressure suppresses the initial ferromagnetic ordering of Ce³⁺, our observation suggests a quantum critical point for CeRuPO near this pressure. The collapsed tetragonal phase transforms into an orthorhombic Cmma structure. This phase is isostructural with the low temperature phase of LaFeAsO, which is superconducting under high pressure. Since CeRuPO exhibits a similar relationship between the two phases of LaFeAsO, the collapsed tetragonal and orthorhombic phases of CeRuPO may adopt a novel magnetic ground state.

Original language	English
Article number	051917
Journal	Applied Physics Letters
Volume	102
Issue number	5
DOIs	https://doi.org/10.1063/1.4791690
Publication status	Published - 2013 Feb 4

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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title = "Pressure-induced tetragonal-orthorhombic phase transitions in CeRuPO",

abstract = "CeRuPO, a ferromagnetic Kondo lattice, undergoes two novel pressure-induced structural phase transitions. CeRuPO undergoes an isostructural transition to a collapsed tetragonal structure near 7.5 GPa. Since pressure suppresses the initial ferromagnetic ordering of Ce3+, our observation suggests a quantum critical point for CeRuPO near this pressure. The collapsed tetragonal phase transforms into an orthorhombic Cmma structure. This phase is isostructural with the low temperature phase of LaFeAsO, which is superconducting under high pressure. Since CeRuPO exhibits a similar relationship between the two phases of LaFeAsO, the collapsed tetragonal and orthorhombic phases of CeRuPO may adopt a novel magnetic ground state.",

author = "S. Hirai and Y. Kamihara and A. Wakatsuki and M. Matoba and Mao, {W. L.}",

note = "Funding Information: This research is funded by the U.S. Department of Energy (DOE), Office of Basic Energy Sciences (BES). S.H. and W.L.M. are supported by the U.S. Department of Energy (DOE), Office of Basic Energy Sciences (BES), Division of Materials Sciences and Engineering, under Contact No. DE-AC02-76SF00515. XRD experiments were performed at HPCAT, APS, ANL. HPCAT is supported by CIW, CDAC, UNLV, and LLNL through funding from DOE-NNSA, DOE-BES, and NSF. APS is supported by DOE-BES, under Contract No. DE-AC02-06CH11357. We thank D. Ikuta and W. Yang for help with the XRD experiments.",

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T1 - Pressure-induced tetragonal-orthorhombic phase transitions in CeRuPO

AU - Hirai, S.

AU - Kamihara, Y.

AU - Wakatsuki, A.

AU - Matoba, M.

AU - Mao, W. L.

N1 - Funding Information: This research is funded by the U.S. Department of Energy (DOE), Office of Basic Energy Sciences (BES). S.H. and W.L.M. are supported by the U.S. Department of Energy (DOE), Office of Basic Energy Sciences (BES), Division of Materials Sciences and Engineering, under Contact No. DE-AC02-76SF00515. XRD experiments were performed at HPCAT, APS, ANL. HPCAT is supported by CIW, CDAC, UNLV, and LLNL through funding from DOE-NNSA, DOE-BES, and NSF. APS is supported by DOE-BES, under Contract No. DE-AC02-06CH11357. We thank D. Ikuta and W. Yang for help with the XRD experiments.

PY - 2013/2/4

Y1 - 2013/2/4

N2 - CeRuPO, a ferromagnetic Kondo lattice, undergoes two novel pressure-induced structural phase transitions. CeRuPO undergoes an isostructural transition to a collapsed tetragonal structure near 7.5 GPa. Since pressure suppresses the initial ferromagnetic ordering of Ce3+, our observation suggests a quantum critical point for CeRuPO near this pressure. The collapsed tetragonal phase transforms into an orthorhombic Cmma structure. This phase is isostructural with the low temperature phase of LaFeAsO, which is superconducting under high pressure. Since CeRuPO exhibits a similar relationship between the two phases of LaFeAsO, the collapsed tetragonal and orthorhombic phases of CeRuPO may adopt a novel magnetic ground state.

AB - CeRuPO, a ferromagnetic Kondo lattice, undergoes two novel pressure-induced structural phase transitions. CeRuPO undergoes an isostructural transition to a collapsed tetragonal structure near 7.5 GPa. Since pressure suppresses the initial ferromagnetic ordering of Ce3+, our observation suggests a quantum critical point for CeRuPO near this pressure. The collapsed tetragonal phase transforms into an orthorhombic Cmma structure. This phase is isostructural with the low temperature phase of LaFeAsO, which is superconducting under high pressure. Since CeRuPO exhibits a similar relationship between the two phases of LaFeAsO, the collapsed tetragonal and orthorhombic phases of CeRuPO may adopt a novel magnetic ground state.

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Pressure-induced tetragonal-orthorhombic phase transitions in CeRuPO

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