Coherent acoustic phonons in hexagonal HoMnO3 probed by femtosecond spectroscopy

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

doi:10.1088/1742-6596/200/1/012107

Coherent acoustic phonons in hexagonal HoMnO₃ probed by femtosecond spectroscopy

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

Research output: Contribution to journal › Conference article › peer-review

Abstract

We have observed the coherent acoustic phonons in the hexagonal manganite HoMnO₃ single crystals using wavelength-dependent femtosecond pump-probe spectroscopy. The oscillatory component of the photoinduced transient reflectivity change (ΔR/R) at various pump-probe wavelengths is consistent with the model of strain pulse propagation. Furthermore, the oscillation period of the oscillation is strong temperature- and wavelength-dependent. In particular, the period of all oscillations in ΔR/R for various wavelengths are very similar in the vicinity of the Néel temperature (T_N), which associates with the appearance of the antiferromagnetic (AFM) long-range ordering.

Original language	English
Article number	012107
Pages (from-to)	1-3
Number of pages	3
Journal	Journal of Physics: Conference Series
Volume	200
DOIs	https://doi.org/10.1088/1742-6596/200/1/012107
State	Published - 15 Feb 2010

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title = "Coherent acoustic phonons in hexagonal HoMnO3 probed by femtosecond spectroscopy",

abstract = "We have observed the coherent acoustic phonons in the hexagonal manganite HoMnO3 single crystals using wavelength-dependent femtosecond pump-probe spectroscopy. The oscillatory component of the photoinduced transient reflectivity change (ΔR/R) at various pump-probe wavelengths is consistent with the model of strain pulse propagation. Furthermore, the oscillation period of the oscillation is strong temperature- and wavelength-dependent. In particular, the period of all oscillations in ΔR/R for various wavelengths are very similar in the vicinity of the N{\'e}el temperature (TN), which associates with the appearance of the antiferromagnetic (AFM) long-range ordering.",

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

year = "2010",

month = feb,

day = "15",

doi = "10.1088/1742-6596/200/1/012107",

language = "English",

volume = "200",

pages = "1--3",

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TY - JOUR

T1 - Coherent acoustic phonons in hexagonal HoMnO3 probed by femtosecond spectroscopy

AU - Luo, Chih-Wei

AU - Shih, H. C.

AU - Wu, Kaung-Hsiung

AU - Lin, Jiunn-Yuan

AU - Juang, Jenh-Yih

AU - Uen, T. M.

AU - Kobayashi, T.

AU - Lee, J. M.

AU - Chen, J. M.

PY - 2010/2/15

Y1 - 2010/2/15

N2 - We have observed the coherent acoustic phonons in the hexagonal manganite HoMnO3 single crystals using wavelength-dependent femtosecond pump-probe spectroscopy. The oscillatory component of the photoinduced transient reflectivity change (ΔR/R) at various pump-probe wavelengths is consistent with the model of strain pulse propagation. Furthermore, the oscillation period of the oscillation is strong temperature- and wavelength-dependent. In particular, the period of all oscillations in ΔR/R for various wavelengths are very similar in the vicinity of the Néel temperature (TN), which associates with the appearance of the antiferromagnetic (AFM) long-range ordering.

AB - We have observed the coherent acoustic phonons in the hexagonal manganite HoMnO3 single crystals using wavelength-dependent femtosecond pump-probe spectroscopy. The oscillatory component of the photoinduced transient reflectivity change (ΔR/R) at various pump-probe wavelengths is consistent with the model of strain pulse propagation. Furthermore, the oscillation period of the oscillation is strong temperature- and wavelength-dependent. In particular, the period of all oscillations in ΔR/R for various wavelengths are very similar in the vicinity of the Néel temperature (TN), which associates with the appearance of the antiferromagnetic (AFM) long-range ordering.

UR - http://www.scopus.com/inward/record.url?scp=77957023934&partnerID=8YFLogxK

U2 - 10.1088/1742-6596/200/1/012107

DO - 10.1088/1742-6596/200/1/012107

M3 - Conference article

AN - SCOPUS:77957023934

SN - 1742-6588

VL - 200

SP - 1

EP - 3

JO - Journal of Physics: Conference Series

JF - Journal of Physics: Conference Series

M1 - 012107

ER -

Coherent acoustic phonons in hexagonal HoMnO₃ probed by femtosecond spectroscopy

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