Spin noncollinearlity in multiferroic phase of triangular lattice antiferromagnet CuFe1-xAlxO2

Taro Nakajima; Setsuo Mitsuda; Shunsuke Kanetsuki; Karel Prokes; Andrei Podlesnyak; Hiroyuki Kimura; Yukio Noda

doi:10.1143/JPSJ.76.043709

Spin noncollinearlity in multiferroic phase of triangular lattice antiferromagnet CuFe_1-xAl_xO₂

Taro Nakajima
, Setsuo Mitsuda
, Shunsuke Kanetsuki
, Karel Prokes
, Andrei Podlesnyak
, Hiroyuki Kimura
, Yukio Noda

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

75 Scopus citations

Abstract

We report a neutron diffraction study of the magnetic field- and impurity-induced ferroelectric states of the triangular lattice antiferromagnet CuFe_1-xAl_xO₂. The magnetic structure of the ferroelectric phase was elucidated to be not a cycloidal structure, which can successfully lead to the electric polarization through the formula P ∝ e_ij x (S_i x S_j) [H. Katsura et al.: Phys. Rev. Lett. 95 (2005) 057205], but a proper helical structure. Nevertheless, the fact that the helical magnetic ordering appears only in the ferroelectric phase among various magnetically ordered phases of CuFe_1-xAl_xO ₂ strongly suggests that a spin noncollinearlity is relevant to the multiferroic nature in CuFe_1-xAl_xO₂.

Original language	English
Article number	043709
Journal	Journal of the Physical Society of Japan
Volume	76
Issue number	4
DOIs	https://doi.org/10.1143/JPSJ.76.043709
State	Published - Apr 2007
Externally published	Yes

Keywords

CuFeO
Multiferroic
Neutron diffraction
Spin frustration
Triangular lattice antiferromagnet

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10.1143/JPSJ.76.043709

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title = "Spin noncollinearlity in multiferroic phase of triangular lattice antiferromagnet CuFe1-xAlxO2",

abstract = "We report a neutron diffraction study of the magnetic field- and impurity-induced ferroelectric states of the triangular lattice antiferromagnet CuFe1-xAlxO2. The magnetic structure of the ferroelectric phase was elucidated to be not a cycloidal structure, which can successfully lead to the electric polarization through the formula P ∝ eij x (Si x Sj) [H. Katsura et al.: Phys. Rev. Lett. 95 (2005) 057205], but a proper helical structure. Nevertheless, the fact that the helical magnetic ordering appears only in the ferroelectric phase among various magnetically ordered phases of CuFe1-xAlxO 2 strongly suggests that a spin noncollinearlity is relevant to the multiferroic nature in CuFe1-xAlxO2.",

keywords = "CuFeO, Multiferroic, Neutron diffraction, Spin frustration, Triangular lattice antiferromagnet",

author = "Taro Nakajima and Setsuo Mitsuda and Shunsuke Kanetsuki and Karel Prokes and Andrei Podlesnyak and Hiroyuki Kimura and Yukio Noda",

year = "2007",

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doi = "10.1143/JPSJ.76.043709",

language = "English",

volume = "76",

journal = "Journal of the Physical Society of Japan",

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T1 - Spin noncollinearlity in multiferroic phase of triangular lattice antiferromagnet CuFe1-xAlxO2

AU - Nakajima, Taro

AU - Mitsuda, Setsuo

AU - Kanetsuki, Shunsuke

AU - Prokes, Karel

AU - Podlesnyak, Andrei

AU - Kimura, Hiroyuki

AU - Noda, Yukio

PY - 2007/4

Y1 - 2007/4

N2 - We report a neutron diffraction study of the magnetic field- and impurity-induced ferroelectric states of the triangular lattice antiferromagnet CuFe1-xAlxO2. The magnetic structure of the ferroelectric phase was elucidated to be not a cycloidal structure, which can successfully lead to the electric polarization through the formula P ∝ eij x (Si x Sj) [H. Katsura et al.: Phys. Rev. Lett. 95 (2005) 057205], but a proper helical structure. Nevertheless, the fact that the helical magnetic ordering appears only in the ferroelectric phase among various magnetically ordered phases of CuFe1-xAlxO 2 strongly suggests that a spin noncollinearlity is relevant to the multiferroic nature in CuFe1-xAlxO2.

AB - We report a neutron diffraction study of the magnetic field- and impurity-induced ferroelectric states of the triangular lattice antiferromagnet CuFe1-xAlxO2. The magnetic structure of the ferroelectric phase was elucidated to be not a cycloidal structure, which can successfully lead to the electric polarization through the formula P ∝ eij x (Si x Sj) [H. Katsura et al.: Phys. Rev. Lett. 95 (2005) 057205], but a proper helical structure. Nevertheless, the fact that the helical magnetic ordering appears only in the ferroelectric phase among various magnetically ordered phases of CuFe1-xAlxO 2 strongly suggests that a spin noncollinearlity is relevant to the multiferroic nature in CuFe1-xAlxO2.

KW - CuFeO

KW - Multiferroic

KW - Neutron diffraction

KW - Spin frustration

KW - Triangular lattice antiferromagnet

UR - https://www.scopus.com/pages/publications/34247215037

U2 - 10.1143/JPSJ.76.043709

DO - 10.1143/JPSJ.76.043709

M3 - Article

AN - SCOPUS:34247215037

SN - 0031-9015

VL - 76

JO - Journal of the Physical Society of Japan

JF - Journal of the Physical Society of Japan

IS - 4

M1 - 043709

ER -

Spin noncollinearlity in multiferroic phase of triangular lattice antiferromagnet CuFe_1-xAl_xO₂

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Keywords

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