Ultrafast thermoelastic dynamics of HoMnO3 single crystals derived from femtosecond optical pump-probe spectroscopy

H. C. Shih; L. Y. Chen; Chih-Wei Luo; Kaung-Hsiung Wu; Jiunn-Yuan Lin; Jenh-Yih Juang; T. M. Uen; J. M. Lee; J. M. Chen; T. Kobayashi

doi:10.1088/1367-2630/13/5/053003

Ultrafast thermoelastic dynamics of HoMnO₃ single crystals derived from femtosecond optical pump-probe spectroscopy

H. C. Shih, L. Y. Chen, Chih-Wei Luo, Kaung-Hsiung Wu, Jiunn-Yuan Lin, Jenh-Yih Juang, T. M. Uen, J. M. Lee, J. M. Chen, T. Kobayashi

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Abstract

In this paper, the photo-induced ultrafast thermoelastic dynamics of hexagonal HoMnO₃ single crystals has been studied by using optical pump-probe spectroscopy. The thermoelastic effect in the ab-plane of hexagonal HoMnO₃, associated with giant magnetoelastic coupling around the Néel temperature (T_N), is intimately correlated to the emergence of a negative component in the transient reflectivity changes (ΔR/R) obtained in temperaturedependent pump-probe experiments. Moreover, the variation in the oscillation period in ΔR/R caused by a strain pulse propagating along the c-axis exhibits an abrupt drop around T_N, presumably due to the antiferromagnetic-orderinginduced changes in ferroelectricity.

Original language	English
Article number	053003
Pages (from-to)	1-11
Number of pages	11
Journal	New Journal of Physics
Volume	13
Issue number	5
DOIs	https://doi.org/10.1088/1367-2630/13/5/053003
State	Published - 1 May 2011

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title = "Ultrafast thermoelastic dynamics of HoMnO3 single crystals derived from femtosecond optical pump-probe spectroscopy",

abstract = "In this paper, the photo-induced ultrafast thermoelastic dynamics of hexagonal HoMnO3 single crystals has been studied by using optical pump-probe spectroscopy. The thermoelastic effect in the ab-plane of hexagonal HoMnO3, associated with giant magnetoelastic coupling around the N{\'e}el temperature (TN), is intimately correlated to the emergence of a negative component in the transient reflectivity changes (ΔR/R) obtained in temperaturedependent pump-probe experiments. Moreover, the variation in the oscillation period in ΔR/R caused by a strain pulse propagating along the c-axis exhibits an abrupt drop around TN, presumably due to the antiferromagnetic-orderinginduced changes in ferroelectricity.",

author = "Shih, {H. C.} and Chen, {L. Y.} and Chih-Wei Luo and Kaung-Hsiung Wu and Jiunn-Yuan Lin and Jenh-Yih Juang and Uen, {T. M.} and Lee, {J. M.} and Chen, {J. M.} and T. Kobayashi",

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T1 - Ultrafast thermoelastic dynamics of HoMnO3 single crystals derived from femtosecond optical pump-probe spectroscopy

AU - Shih, H. C.

AU - Chen, L. Y.

AU - Luo, Chih-Wei

AU - Wu, Kaung-Hsiung

AU - Lin, Jiunn-Yuan

AU - Juang, Jenh-Yih

AU - Uen, T. M.

AU - Lee, J. M.

AU - Chen, J. M.

AU - Kobayashi, T.

PY - 2011/5/1

Y1 - 2011/5/1

N2 - In this paper, the photo-induced ultrafast thermoelastic dynamics of hexagonal HoMnO3 single crystals has been studied by using optical pump-probe spectroscopy. The thermoelastic effect in the ab-plane of hexagonal HoMnO3, associated with giant magnetoelastic coupling around the Néel temperature (TN), is intimately correlated to the emergence of a negative component in the transient reflectivity changes (ΔR/R) obtained in temperaturedependent pump-probe experiments. Moreover, the variation in the oscillation period in ΔR/R caused by a strain pulse propagating along the c-axis exhibits an abrupt drop around TN, presumably due to the antiferromagnetic-orderinginduced changes in ferroelectricity.

AB - In this paper, the photo-induced ultrafast thermoelastic dynamics of hexagonal HoMnO3 single crystals has been studied by using optical pump-probe spectroscopy. The thermoelastic effect in the ab-plane of hexagonal HoMnO3, associated with giant magnetoelastic coupling around the Néel temperature (TN), is intimately correlated to the emergence of a negative component in the transient reflectivity changes (ΔR/R) obtained in temperaturedependent pump-probe experiments. Moreover, the variation in the oscillation period in ΔR/R caused by a strain pulse propagating along the c-axis exhibits an abrupt drop around TN, presumably due to the antiferromagnetic-orderinginduced changes in ferroelectricity.

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ER -

Ultrafast thermoelastic dynamics of HoMnO₃ single crystals derived from femtosecond optical pump-probe spectroscopy

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