Evidence for magnetic-field-induced quadrupolar ordering in the heavy-fermion superconductor PrOs4Sb12

Masahumi Kohgi; Kazuaki Iwasa; Motoki Nakajima; Naoto Metoki; Shingo Araki; Nick Bernhoeft; Jean Michel Mignot; Arsen Gukasov; Hideyuki Sato; Yuji Aoki; Hitoshi Sugawara

doi:10.1143/JPSJ.72.1002

Evidence for magnetic-field-induced quadrupolar ordering in the heavy-fermion superconductor PrOs₄Sb₁₂

Masahumi Kohgi, Kazuaki Iwasa, Motoki Nakajima, Naoto Metoki, Shingo Araki, Nick Bernhoeft, Jean Michel Mignot, Arsen Gukasov, Hideyuki Sato, Yuji Aoki, Hitoshi Sugawara

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

206 Citations (Scopus)

Abstract

Neutron diffraction experiments on the heavy-fermion superconductor PrOs₄Sb₁₂ revealed that a small antiferromagnetic moment, parallel to [010] (γ-direction), is induced in the field-induced phase (H ∥ z). The analysis, based on the Γ₁ singlet ground state crystal field model, shows that antiferro-order of O_yz-type quadrupole moments of Pr ions is formed in the field-induced phase. This strongly suggests that the crystal field ground-state of Pr ions in PrOs ₄Sb₁₂ is the Γ₁ singlet and the quadrupolar ordering is induced due to level crossing with an excited state under a magnetic field.

Original language	English
Pages (from-to)	1002-1005
Number of pages	4
Journal	journal of the physical society of japan
Volume	72
Issue number	5
DOIs	https://doi.org/10.1143/JPSJ.72.1002
Publication status	Published - 2003 May
Externally published	Yes

Keywords

Heavy fermion
Huperconductivity
Neutron diffraction
PrOsSb
Quadrupolar ordering

ASJC Scopus subject areas

Physics and Astronomy(all)

Access to Document

10.1143/JPSJ.72.1002

Cite this

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title = "Evidence for magnetic-field-induced quadrupolar ordering in the heavy-fermion superconductor PrOs4Sb12",

abstract = "Neutron diffraction experiments on the heavy-fermion superconductor PrOs4Sb12 revealed that a small antiferromagnetic moment, parallel to [010] (γ-direction), is induced in the field-induced phase (H ∥ z). The analysis, based on the Γ1 singlet ground state crystal field model, shows that antiferro-order of Oyz-type quadrupole moments of Pr ions is formed in the field-induced phase. This strongly suggests that the crystal field ground-state of Pr ions in PrOs 4Sb12 is the Γ1 singlet and the quadrupolar ordering is induced due to level crossing with an excited state under a magnetic field.",

keywords = "Heavy fermion, Huperconductivity, Neutron diffraction, PrOsSb, Quadrupolar ordering",

author = "Masahumi Kohgi and Kazuaki Iwasa and Motoki Nakajima and Naoto Metoki and Shingo Araki and Nick Bernhoeft and Mignot, {Jean Michel} and Arsen Gukasov and Hideyuki Sato and Yuji Aoki and Hitoshi Sugawara",

year = "2003",

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doi = "10.1143/JPSJ.72.1002",

language = "English",

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publisher = "Physical Society of Japan",

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TY - JOUR

T1 - Evidence for magnetic-field-induced quadrupolar ordering in the heavy-fermion superconductor PrOs4Sb12

AU - Kohgi, Masahumi

AU - Iwasa, Kazuaki

AU - Nakajima, Motoki

AU - Metoki, Naoto

AU - Araki, Shingo

AU - Bernhoeft, Nick

AU - Mignot, Jean Michel

AU - Gukasov, Arsen

AU - Sato, Hideyuki

AU - Aoki, Yuji

AU - Sugawara, Hitoshi

PY - 2003/5

Y1 - 2003/5

N2 - Neutron diffraction experiments on the heavy-fermion superconductor PrOs4Sb12 revealed that a small antiferromagnetic moment, parallel to [010] (γ-direction), is induced in the field-induced phase (H ∥ z). The analysis, based on the Γ1 singlet ground state crystal field model, shows that antiferro-order of Oyz-type quadrupole moments of Pr ions is formed in the field-induced phase. This strongly suggests that the crystal field ground-state of Pr ions in PrOs 4Sb12 is the Γ1 singlet and the quadrupolar ordering is induced due to level crossing with an excited state under a magnetic field.

AB - Neutron diffraction experiments on the heavy-fermion superconductor PrOs4Sb12 revealed that a small antiferromagnetic moment, parallel to [010] (γ-direction), is induced in the field-induced phase (H ∥ z). The analysis, based on the Γ1 singlet ground state crystal field model, shows that antiferro-order of Oyz-type quadrupole moments of Pr ions is formed in the field-induced phase. This strongly suggests that the crystal field ground-state of Pr ions in PrOs 4Sb12 is the Γ1 singlet and the quadrupolar ordering is induced due to level crossing with an excited state under a magnetic field.

KW - Heavy fermion

KW - Huperconductivity

KW - Neutron diffraction

KW - PrOsSb

KW - Quadrupolar ordering

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