Sinusoidally modulated magnetic structure of Kramers local moments in CePd                         5                         Al                         2

Takahiro Onimaru; Yukihiro F. Inoue; Akihiro Ishida; Kazunori Umeo; Yasuaki Oohara; Taku J. Sato; Devashibhai T. Adroja; Toshiro Takabatake

doi:10.1088/1361-648X/aafe51

Sinusoidally modulated magnetic structure of Kramers local moments in CePd ₅ Al ₂

Takahiro Onimaru, Yukihiro F. Inoue, Akihiro Ishida, Kazunori Umeo, Yasuaki Oohara, Taku J. Sato, Devashibhai T. Adroja, Toshiro Takabatake

Physics

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

4 Citations (Scopus)

Abstract

The crystalline electric field (CEF) level scheme and magnetic structure of a tetragonal antiferromagnet CePd ₅ Al ₂ with K and K were studied by neutron scattering, magnetization and magnetoresistance measurements. Inelastic neutron scattering measurements on the powder sample revealed CEF excitations at 21.3 and 22.4 meV. The derived wave functions of the CEF ground state for the Ce ³⁺ ion consist primarily of under the tetragonal symmetry. By means of single-crystal neutron diffraction, magnetic Bragg peaks characterized by a propagation vector k = [δ, δ, O] were observed at T < T _N1 . Our analysis indicates a sinusoidally modulated magnetic structure with amplitude of 2.0(1) μB/Ce, where the magnetic moments point to the -axis. The intensity of the third-order harmonic at 0.8 K is 1/30 as small as that expected for an antiphase structure, suggesting that the modulated structure remains at least down to 0.8 K. Both the magnetization and magnetoresistance show several anomalies in the magnetically ordered phase, indicating field-induced successive changes of the magnetic structure.

Original language	English
Article number	125603
Journal	Journal of Physics Condensed Matter
Volume	31
Issue number	12
DOIs	https://doi.org/10.1088/1361-648X/aafe51
Publication status	Published - 31 Jan 2019

Keywords

antiferromagnet
crystalline electric field
magnetic structure
neutron scattering

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics

Access to Document

10.1088/1361-648X/aafe51

Cite this

Onimaru, T., Inoue, Y. F., Ishida, A., Umeo, K., Oohara, Y., Sato, T. J., Adroja, D. T., & Takabatake, T. (2019). Sinusoidally modulated magnetic structure of Kramers local moments in CePd ₅ Al ₂ Journal of Physics Condensed Matter, 31(12), Article 125603. https://doi.org/10.1088/1361-648X/aafe51

@article{214785dfbf1a47bd98794464ec69e266,

title = " Sinusoidally modulated magnetic structure of Kramers local moments in CePd 5 Al 2 ",

abstract = " The crystalline electric field (CEF) level scheme and magnetic structure of a tetragonal antiferromagnet CePd 5 Al 2 with K and K were studied by neutron scattering, magnetization and magnetoresistance measurements. Inelastic neutron scattering measurements on the powder sample revealed CEF excitations at 21.3 and 22.4 meV. The derived wave functions of the CEF ground state for the Ce 3+ ion consist primarily of under the tetragonal symmetry. By means of single-crystal neutron diffraction, magnetic Bragg peaks characterized by a propagation vector k = [δ, δ, O] were observed at T < T N1 . Our analysis indicates a sinusoidally modulated magnetic structure with amplitude of 2.0(1) μB/Ce, where the magnetic moments point to the -axis. The intensity of the third-order harmonic at 0.8 K is 1/30 as small as that expected for an antiphase structure, suggesting that the modulated structure remains at least down to 0.8 K. Both the magnetization and magnetoresistance show several anomalies in the magnetically ordered phase, indicating field-induced successive changes of the magnetic structure.",

keywords = "antiferromagnet, crystalline electric field, magnetic structure, neutron scattering",

author = "Takahiro Onimaru and Inoue, {Yukihiro F.} and Akihiro Ishida and Kazunori Umeo and Yasuaki Oohara and Sato, {Taku J.} and Adroja, {Devashibhai T.} and Toshiro Takabatake",

note = "Publisher Copyright: {\textcopyright} 2019 IOP Publishing Ltd.",

year = "2019",

month = jan,

day = "31",

doi = "10.1088/1361-648X/aafe51",

language = "English",

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Onimaru, T, Inoue, YF, Ishida, A, Umeo, K, Oohara, Y, Sato, TJ, Adroja, DT & Takabatake, T 2019, ' Sinusoidally modulated magnetic structure of Kramers local moments in CePd ₅ Al ₂ ', Journal of Physics Condensed Matter, vol. 31, no. 12, 125603. https://doi.org/10.1088/1361-648X/aafe51

Sinusoidally modulated magnetic structure of Kramers local moments in CePd ₅ Al ₂ . / Onimaru, Takahiro; Inoue, Yukihiro F.; Ishida, Akihiro et al.
In: Journal of Physics Condensed Matter, Vol. 31, No. 12, 125603, 31.01.2019.

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

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AU - Onimaru, Takahiro

AU - Inoue, Yukihiro F.

AU - Ishida, Akihiro

AU - Umeo, Kazunori

AU - Oohara, Yasuaki

AU - Sato, Taku J.

AU - Adroja, Devashibhai T.

AU - Takabatake, Toshiro

PY - 2019/1/31

Y1 - 2019/1/31

N2 - The crystalline electric field (CEF) level scheme and magnetic structure of a tetragonal antiferromagnet CePd 5 Al 2 with K and K were studied by neutron scattering, magnetization and magnetoresistance measurements. Inelastic neutron scattering measurements on the powder sample revealed CEF excitations at 21.3 and 22.4 meV. The derived wave functions of the CEF ground state for the Ce 3+ ion consist primarily of under the tetragonal symmetry. By means of single-crystal neutron diffraction, magnetic Bragg peaks characterized by a propagation vector k = [δ, δ, O] were observed at T < T N1 . Our analysis indicates a sinusoidally modulated magnetic structure with amplitude of 2.0(1) μB/Ce, where the magnetic moments point to the -axis. The intensity of the third-order harmonic at 0.8 K is 1/30 as small as that expected for an antiphase structure, suggesting that the modulated structure remains at least down to 0.8 K. Both the magnetization and magnetoresistance show several anomalies in the magnetically ordered phase, indicating field-induced successive changes of the magnetic structure.

AB - The crystalline electric field (CEF) level scheme and magnetic structure of a tetragonal antiferromagnet CePd 5 Al 2 with K and K were studied by neutron scattering, magnetization and magnetoresistance measurements. Inelastic neutron scattering measurements on the powder sample revealed CEF excitations at 21.3 and 22.4 meV. The derived wave functions of the CEF ground state for the Ce 3+ ion consist primarily of under the tetragonal symmetry. By means of single-crystal neutron diffraction, magnetic Bragg peaks characterized by a propagation vector k = [δ, δ, O] were observed at T < T N1 . Our analysis indicates a sinusoidally modulated magnetic structure with amplitude of 2.0(1) μB/Ce, where the magnetic moments point to the -axis. The intensity of the third-order harmonic at 0.8 K is 1/30 as small as that expected for an antiphase structure, suggesting that the modulated structure remains at least down to 0.8 K. Both the magnetization and magnetoresistance show several anomalies in the magnetically ordered phase, indicating field-induced successive changes of the magnetic structure.

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