Pressure-induced tetragonal-orthorhombic phase transitions in CeRuPO

被引：2

作者：

Hirai, S. ^{[1
,2
]}

Kamihara, Y. ^{[3
]}

Wakatsuki, A. ^{[3
]}

Matoba, M. ^{[3
]}

Mao, W. L. ^{[1
,2
]}

机构：

[1] Stanford Univ, Dept Geol & Environm Sci, Stanford, CA 94305 USA

[2] SLAC Natl Accelerator Lab, Stanford Inst Energy & Mat Sci, Menlo Pk, CA 94025 USA

[3] Keio Univ, Dept Appl Phys & Physicoinformat, Yokohama, Kanagawa 2238522, Japan

来源：

APPLIED PHYSICS LETTERS | 2013年 / 102卷 / 05期

关键词：

D O I：

10.1063/1.4791690

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

CeRuPO, a ferromagnetic Kondo lattice, undergoes two novel pressure-induced structural phase transitions. CeRuPO undergoes an isostructural transition to a collapsed tetragonal structure near 7.5GPa. 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. (C) 2013 American Institute of Physics. [http://dx.doi.org/10.1063/1.4791690]

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