Spiral spin structure in the Heisenberg pyrochlore magnet Cd Cr2 O4

M. Matsuda, M. Takeda, M. Nakamura, K. Kakurai, A. Oosawa, E. Lelièvre-Berna, Jaiho Chung, H. Ueda, H. Takagi, S. H. Lee

Research output: Contribution to journalArticle

40 Citations (Scopus)

Abstract

A frustrated spinel Cd Cr2 O4 undergoes a three-dimensional spin-Peierls transition at TN =7.8 K from a cubic paramagnetic to a tetragonal Néel state. The Néel state has a spiral magnetic structure with a characteristic wave vector of (0, δ, 1) when the c axis is elongated. Here, we report our spherical neutron polarimetry experiments to investigate the spiral spin structure in detail. Our results indicate that the spins lie in the ac plane perpendicular to the direction of the spiral modulation. We also find that the spiral structure in the ac plane is elliptical with the c component larger by ∼24% than the a component, suggesting a strong coupling between the magnetic structure and the structural distortion. Unpolarized neutron diffraction under an external magnetic field has also been performed. The magnetic-field dependence suggests the existence of magnetic anisotropy in the Néel state, which is consistent with our previous inelastic studies.

Original languageEnglish
Article number104415
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume75
Issue number10
DOIs
Publication statusPublished - 2007 Mar 21
Externally publishedYes

Fingerprint

Magnetic structure
Magnets
magnets
Magnetic fields
Polarimeters
Magnetic anisotropy
Neutron diffraction
Neutrons
Modulation
polarimetry
magnetic fields
spinel
neutron diffraction
Experiments
modulation
neutrons
anisotropy
pyrochlore
Direction compound
spinell

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Matsuda, M., Takeda, M., Nakamura, M., Kakurai, K., Oosawa, A., Lelièvre-Berna, E., ... Lee, S. H. (2007). Spiral spin structure in the Heisenberg pyrochlore magnet Cd Cr2 O4. Physical Review B - Condensed Matter and Materials Physics, 75(10), [104415]. https://doi.org/10.1103/PhysRevB.75.104415

Spiral spin structure in the Heisenberg pyrochlore magnet Cd Cr2 O4. / Matsuda, M.; Takeda, M.; Nakamura, M.; Kakurai, K.; Oosawa, A.; Lelièvre-Berna, E.; Chung, Jaiho; Ueda, H.; Takagi, H.; Lee, S. H.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 75, No. 10, 104415, 21.03.2007.

Research output: Contribution to journalArticle

Matsuda, M, Takeda, M, Nakamura, M, Kakurai, K, Oosawa, A, Lelièvre-Berna, E, Chung, J, Ueda, H, Takagi, H & Lee, SH 2007, 'Spiral spin structure in the Heisenberg pyrochlore magnet Cd Cr2 O4', Physical Review B - Condensed Matter and Materials Physics, vol. 75, no. 10, 104415. https://doi.org/10.1103/PhysRevB.75.104415
Matsuda, M. ; Takeda, M. ; Nakamura, M. ; Kakurai, K. ; Oosawa, A. ; Lelièvre-Berna, E. ; Chung, Jaiho ; Ueda, H. ; Takagi, H. ; Lee, S. H. / Spiral spin structure in the Heisenberg pyrochlore magnet Cd Cr2 O4. In: Physical Review B - Condensed Matter and Materials Physics. 2007 ; Vol. 75, No. 10.
@article{fa9fcd07c02f4fa6ba4d3c405cbbd983,
title = "Spiral spin structure in the Heisenberg pyrochlore magnet Cd Cr2 O4",
abstract = "A frustrated spinel Cd Cr2 O4 undergoes a three-dimensional spin-Peierls transition at TN =7.8 K from a cubic paramagnetic to a tetragonal N{\'e}el state. The N{\'e}el state has a spiral magnetic structure with a characteristic wave vector of (0, δ, 1) when the c axis is elongated. Here, we report our spherical neutron polarimetry experiments to investigate the spiral spin structure in detail. Our results indicate that the spins lie in the ac plane perpendicular to the direction of the spiral modulation. We also find that the spiral structure in the ac plane is elliptical with the c component larger by ∼24{\%} than the a component, suggesting a strong coupling between the magnetic structure and the structural distortion. Unpolarized neutron diffraction under an external magnetic field has also been performed. The magnetic-field dependence suggests the existence of magnetic anisotropy in the N{\'e}el state, which is consistent with our previous inelastic studies.",
author = "M. Matsuda and M. Takeda and M. Nakamura and K. Kakurai and A. Oosawa and E. Leli{\`e}vre-Berna and Jaiho Chung and H. Ueda and H. Takagi and Lee, {S. H.}",
year = "2007",
month = "3",
day = "21",
doi = "10.1103/PhysRevB.75.104415",
language = "English",
volume = "75",
journal = "Physical Review B-Condensed Matter",
issn = "1098-0121",
publisher = "American Institute of Physics Publising LLC",
number = "10",

}

TY - JOUR

T1 - Spiral spin structure in the Heisenberg pyrochlore magnet Cd Cr2 O4

AU - Matsuda, M.

AU - Takeda, M.

AU - Nakamura, M.

AU - Kakurai, K.

AU - Oosawa, A.

AU - Lelièvre-Berna, E.

AU - Chung, Jaiho

AU - Ueda, H.

AU - Takagi, H.

AU - Lee, S. H.

PY - 2007/3/21

Y1 - 2007/3/21

N2 - A frustrated spinel Cd Cr2 O4 undergoes a three-dimensional spin-Peierls transition at TN =7.8 K from a cubic paramagnetic to a tetragonal Néel state. The Néel state has a spiral magnetic structure with a characteristic wave vector of (0, δ, 1) when the c axis is elongated. Here, we report our spherical neutron polarimetry experiments to investigate the spiral spin structure in detail. Our results indicate that the spins lie in the ac plane perpendicular to the direction of the spiral modulation. We also find that the spiral structure in the ac plane is elliptical with the c component larger by ∼24% than the a component, suggesting a strong coupling between the magnetic structure and the structural distortion. Unpolarized neutron diffraction under an external magnetic field has also been performed. The magnetic-field dependence suggests the existence of magnetic anisotropy in the Néel state, which is consistent with our previous inelastic studies.

AB - A frustrated spinel Cd Cr2 O4 undergoes a three-dimensional spin-Peierls transition at TN =7.8 K from a cubic paramagnetic to a tetragonal Néel state. The Néel state has a spiral magnetic structure with a characteristic wave vector of (0, δ, 1) when the c axis is elongated. Here, we report our spherical neutron polarimetry experiments to investigate the spiral spin structure in detail. Our results indicate that the spins lie in the ac plane perpendicular to the direction of the spiral modulation. We also find that the spiral structure in the ac plane is elliptical with the c component larger by ∼24% than the a component, suggesting a strong coupling between the magnetic structure and the structural distortion. Unpolarized neutron diffraction under an external magnetic field has also been performed. The magnetic-field dependence suggests the existence of magnetic anisotropy in the Néel state, which is consistent with our previous inelastic studies.

UR - http://www.scopus.com/inward/record.url?scp=33947515032&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33947515032&partnerID=8YFLogxK

U2 - 10.1103/PhysRevB.75.104415

DO - 10.1103/PhysRevB.75.104415

M3 - Article

VL - 75

JO - Physical Review B-Condensed Matter

JF - Physical Review B-Condensed Matter

SN - 1098-0121

IS - 10

M1 - 104415

ER -