Whirling spin order in the quasicrystal approximant Au72Al14Tb14

Taku J. Sato; Asuka Ishikawa; Akira Sakurai; Masashi Hattori; Maxim Avdeev; Ryuji Tamura

doi:10.1103/PhysRevB.100.054417

Whirling spin order in the quasicrystal approximant Au72Al14Tb14

Taku J. Sato, Asuka Ishikawa, Akira Sakurai, Masashi Hattori, Maxim Avdeev, Ryuji Tamura

IMRAM - Division of Inorganic Material Research

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

41 Citations (Scopus)

Abstract

A neutron powder diffraction experiment has been performed on the quasicrystal approximant Au72Al14Tb14, a body-centered-cubic crystal of icosahedral spin clusters. The long-range antiferromagnetic order was confirmed at the transition temperature TN=10.4 K. The magnetic structure consists of noncoplanar whirling spins on the icosahedral clusters, arranged in an antiferroic manner. A simple icosahedral spin-cluster model with uniaxial anisotropy accounts well the whirling spin order as well as the in-field metamagnetic transition, indicating that the icosahedral symmetry is essential.

Original language	English
Article number	054417
Journal	Physical Review B
Volume	100
Issue number	5
DOIs	https://doi.org/10.1103/PhysRevB.100.054417
Publication status	Published - 2019 Aug 13

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10.1103/PhysRevB.100.054417

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abstract = "A neutron powder diffraction experiment has been performed on the quasicrystal approximant Au72Al14Tb14, a body-centered-cubic crystal of icosahedral spin clusters. The long-range antiferromagnetic order was confirmed at the transition temperature TN=10.4 K. The magnetic structure consists of noncoplanar whirling spins on the icosahedral clusters, arranged in an antiferroic manner. A simple icosahedral spin-cluster model with uniaxial anisotropy accounts well the whirling spin order as well as the in-field metamagnetic transition, indicating that the icosahedral symmetry is essential.",

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AU - Avdeev, Maxim

AU - Tamura, Ryuji

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AB - A neutron powder diffraction experiment has been performed on the quasicrystal approximant Au72Al14Tb14, a body-centered-cubic crystal of icosahedral spin clusters. The long-range antiferromagnetic order was confirmed at the transition temperature TN=10.4 K. The magnetic structure consists of noncoplanar whirling spins on the icosahedral clusters, arranged in an antiferroic manner. A simple icosahedral spin-cluster model with uniaxial anisotropy accounts well the whirling spin order as well as the in-field metamagnetic transition, indicating that the icosahedral symmetry is essential.

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Whirling spin order in the quasicrystal approximant Au72Al14Tb14

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