Magnetic excitations in infinite-layer antiferromagnetic insulator

Keisuke Tomiyasu; Hiroshi Kageyama; Changhoon Lee; Mike H. Whangbo; Yoshihiro Tsujimoto; Kazuyoshi Yoshimura; Jon W. Taylor; Anna Llobet; Frans Trouw; Kazuhisa Kakurai; Kazuyoshi Yamada

doi:10.1143/JPSJ.79.034707

Magnetic excitations in infinite-layer antiferromagnetic insulator

Keisuke Tomiyasu, Hiroshi Kageyama, Changhoon Lee, Mike H. Whangbo, Yoshihiro Tsujimoto, Kazuyoshi Yoshimura, Jon W. Taylor, Anna Llobet, Frans Trouw, Kazuhisa Kakurai, Kazuyoshi Yamada

SCI - Physics

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

15 Citations (Scopus)

Abstract

The magnetic excitations of an infinite-layer antiferromagnetic insulator SrFeO₂ were examined by powder inelastic neutron scattering to find dispersive magnetic excitations from ∼15 up to 63 meV. The scattering intensity distribution is well described by a spin wave model, confirming that the out-of-plane direct FeFe exchange is comparable in strength to the in-plane Fe-O-Fe superexchange. SrFeO₂ shows an additional magnetic excitation mode around 30 meV, which is suggestive of an orbital magnon arising from small orbital moment on Fe²⁺ brought about by spin-orbit coupling.

Original language	English
Article number	034707
Journal	journal of the physical society of japan
Volume	79
Issue number	3
DOIs	https://doi.org/10.1143/JPSJ.79.034707
Publication status	Published - 2010 Mar

Keywords

Mott insulator
Orbital angular momentum
Orbital wave
Spin wave

ASJC Scopus subject areas

Physics and Astronomy(all)

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10.1143/JPSJ.79.034707

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Magnetic excitations in infinite-layer antiferromagnetic insulator. / Tomiyasu, Keisuke; Kageyama, Hiroshi; Lee, Changhoon; Whangbo, Mike H.; Tsujimoto, Yoshihiro; Yoshimura, Kazuyoshi; Taylor, Jon W.; Llobet, Anna; Trouw, Frans; Kakurai, Kazuhisa; Yamada, Kazuyoshi.

In: journal of the physical society of japan, Vol. 79, No. 3, 034707, 03.2010.

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

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abstract = "The magnetic excitations of an infinite-layer antiferromagnetic insulator SrFeO2 were examined by powder inelastic neutron scattering to find dispersive magnetic excitations from ∼15 up to 63 meV. The scattering intensity distribution is well described by a spin wave model, confirming that the out-of-plane direct FeFe exchange is comparable in strength to the in-plane Fe-O-Fe superexchange. SrFeO2 shows an additional magnetic excitation mode around 30 meV, which is suggestive of an orbital magnon arising from small orbital moment on Fe2+ brought about by spin-orbit coupling.",

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AU - Kageyama, Hiroshi

AU - Lee, Changhoon

AU - Whangbo, Mike H.

AU - Tsujimoto, Yoshihiro

AU - Yoshimura, Kazuyoshi

AU - Taylor, Jon W.

AU - Llobet, Anna

AU - Trouw, Frans

AU - Kakurai, Kazuhisa

AU - Yamada, Kazuyoshi

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KW - Orbital angular momentum

KW - Orbital wave

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