Observation of higher-harmonic helical spin-resonance modes in the chromium spinel CdCr2O4

S. Kimura; M. Hagiwara; H. Ueda; Y. Narumi; K. Kindo; H. Yashiro; T. Kashiwagi; H. Takagi

doi:10.1103/PhysRevLett.97.257202

Observation of higher-harmonic helical spin-resonance modes in the chromium spinel CdCr2O4

S. Kimura, M. Hagiwara, H. Ueda, Y. Narumi, K. Kindo, H. Yashiro, T. Kashiwagi, H. Takagi

Materials Property Division

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

23 Citations (Scopus)

Abstract

High frequency ESR measurements on the chromium spinel compound CdCr2O4 have been performed. The observed ESR modes below Hcâ€â‰ 5.7T can be explained well by the calculated resonance modes based on a molecular field theory assuming a helical spin structure. Other than the fundamental ones, we have succeeded in observing the higher-harmonic modes for the first time. A large change of the ESR modes above Hcâ€ indicate that a variation of the spin structure from the helical to the four-sublattice canted one takes place around Hcâ€.

Original language	English
Article number	257202
Journal	Physical review letters
Volume	97
Issue number	25
DOIs	https://doi.org/10.1103/PhysRevLett.97.257202
Publication status	Published - 2006

ASJC Scopus subject areas

Physics and Astronomy(all)

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AU - Kimura, S.

AU - Hagiwara, M.

AU - Ueda, H.

AU - Narumi, Y.

AU - Kindo, K.

AU - Yashiro, H.

AU - Kashiwagi, T.

AU - Takagi, H.

PY - 2006

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AB - High frequency ESR measurements on the chromium spinel compound CdCr2O4 have been performed. The observed ESR modes below Hcâ€â‰ 5.7T can be explained well by the calculated resonance modes based on a molecular field theory assuming a helical spin structure. Other than the fundamental ones, we have succeeded in observing the higher-harmonic modes for the first time. A large change of the ESR modes above Hcâ€ indicate that a variation of the spin structure from the helical to the four-sublattice canted one takes place around Hcâ€.

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