Femtosecond time-resolved reflection spectroscopy in Pr 1-xCaxMnO3 (x=0.37)

Xianzhou Peng; Yoichi Okimoto; Masato Endo; Ken Sato; Takeshi Aizawa; Ken Onda; Tadahiko Ishikawa; Shin Ya Koshihara; Taka Hisa Arima

doi:10.1002/pssc.200879884

Femtosecond time-resolved reflection spectroscopy in Pr _1-xCa_xMnO₃ (x=0.37)

Xianzhou Peng, Yoichi Okimoto, Masato Endo, Ken Sato, Takeshi Aizawa, Ken Onda, Tadahiko Ishikawa, Shin Ya Koshihara, Taka Hisa Arima

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

Abstract

The ultrafast dynamics of photoinduced phase transition (PIPT) in a crystal of Pr_1-xCa_xMnO₃ (x 0.37) stud been studied by means of femtosecond time-resolved spectroscopy. Just after photoirradiation of 1.58 eV light at 100 K, ultrafast change of reflectivity (ΔR/R) was observed witiiin ~1 ps utilizing the probe light of 0.5 eV due to the ferromagnetic metallic phase transition. While the fast component of ΔR/R gradually increases with increasing the excitation intensity, the slow component observed at the delay time of ∼1 ps shows unusual dependence on the excitation intensity. The signature of ΔR/R changes from negative to positive with the excitaiton power, which cannot be explained by the photothermal heating effect. In addition, we investigated the temperature dependence of the ΔR/R at 0.5 eV and observed the sudden change of ΔR/R around TN, which indicates that the efficiency of PIPT is closely correlated with the ordering of spin and extra electron in Mn4+.

Original language	English
Pages (from-to)	252-255
Number of pages	4
Journal	Physica Status Solidi (C) Current Topics in Solid State Physics
Volume	6
Issue number	1
DOIs	https://doi.org/10.1002/pssc.200879884
Publication status	Published - Apr 6 2009
Externally published	Yes
Event	8th International Conference on Excitonic Processes in Condensed Matter, EXCON'08 - Kyoto, Japan Duration: Jun 22 2008 → Jun 27 2008

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

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10.1002/pssc.200879884

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title = "Femtosecond time-resolved reflection spectroscopy in Pr 1-xCaxMnO3 (x=0.37)",

abstract = "The ultrafast dynamics of photoinduced phase transition (PIPT) in a crystal of Pr1-xCaxMnO3 (x 0.37) stud been studied by means of femtosecond time-resolved spectroscopy. Just after photoirradiation of 1.58 eV light at 100 K, ultrafast change of reflectivity (ΔR/R) was observed witiiin ~1 ps utilizing the probe light of 0.5 eV due to the ferromagnetic metallic phase transition. While the fast component of ΔR/R gradually increases with increasing the excitation intensity, the slow component observed at the delay time of ∼1 ps shows unusual dependence on the excitation intensity. The signature of ΔR/R changes from negative to positive with the excitaiton power, which cannot be explained by the photothermal heating effect. In addition, we investigated the temperature dependence of the ΔR/R at 0.5 eV and observed the sudden change of ΔR/R around TN, which indicates that the efficiency of PIPT is closely correlated with the ordering of spin and extra electron in Mn4+.",

author = "Xianzhou Peng and Yoichi Okimoto and Masato Endo and Ken Sato and Takeshi Aizawa and Ken Onda and Tadahiko Ishikawa and Koshihara, {Shin Ya} and Arima, {Taka Hisa}",

year = "2009",

month = apr,

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doi = "10.1002/pssc.200879884",

language = "English",

volume = "6",

pages = "252--255",

journal = "Physica Status Solidi C: Conferences",

issn = "1862-6351",

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AU - Peng, Xianzhou

AU - Okimoto, Yoichi

AU - Endo, Masato

AU - Sato, Ken

AU - Aizawa, Takeshi

AU - Onda, Ken

AU - Ishikawa, Tadahiko

AU - Koshihara, Shin Ya

AU - Arima, Taka Hisa

PY - 2009/4/6

Y1 - 2009/4/6

N2 - The ultrafast dynamics of photoinduced phase transition (PIPT) in a crystal of Pr1-xCaxMnO3 (x 0.37) stud been studied by means of femtosecond time-resolved spectroscopy. Just after photoirradiation of 1.58 eV light at 100 K, ultrafast change of reflectivity (ΔR/R) was observed witiiin ~1 ps utilizing the probe light of 0.5 eV due to the ferromagnetic metallic phase transition. While the fast component of ΔR/R gradually increases with increasing the excitation intensity, the slow component observed at the delay time of ∼1 ps shows unusual dependence on the excitation intensity. The signature of ΔR/R changes from negative to positive with the excitaiton power, which cannot be explained by the photothermal heating effect. In addition, we investigated the temperature dependence of the ΔR/R at 0.5 eV and observed the sudden change of ΔR/R around TN, which indicates that the efficiency of PIPT is closely correlated with the ordering of spin and extra electron in Mn4+.

AB - The ultrafast dynamics of photoinduced phase transition (PIPT) in a crystal of Pr1-xCaxMnO3 (x 0.37) stud been studied by means of femtosecond time-resolved spectroscopy. Just after photoirradiation of 1.58 eV light at 100 K, ultrafast change of reflectivity (ΔR/R) was observed witiiin ~1 ps utilizing the probe light of 0.5 eV due to the ferromagnetic metallic phase transition. While the fast component of ΔR/R gradually increases with increasing the excitation intensity, the slow component observed at the delay time of ∼1 ps shows unusual dependence on the excitation intensity. The signature of ΔR/R changes from negative to positive with the excitaiton power, which cannot be explained by the photothermal heating effect. In addition, we investigated the temperature dependence of the ΔR/R at 0.5 eV and observed the sudden change of ΔR/R around TN, which indicates that the efficiency of PIPT is closely correlated with the ordering of spin and extra electron in Mn4+.

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ER -

Femtosecond time-resolved reflection spectroscopy in Pr _1-xCa_xMnO₃ (x=0.37)

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