Subnanosecond phase transition dynamics in laser-shocked iron

H. Hwang; E. Galtier; H. Cynn; I. Eom; S. H. Chun; Y. Bang; G. C. Hwang; J. Choi; T. Kim; M. Kong; S. Kwon; K. Kang; H. J. Lee; C. Park; J. I. Lee; Yongmoon Lee; W. Yang; S. H. Shim; T. Vogt; Sangsoo Kim; J. Park; Sunam Kim; D. Nam; J. H. Lee; H. Hyun; M. Kim; T. Y. Koo; C. C. Kao; T. Sekine; T. Sekine; Yongjae Lee

doi:10.1126/sciadv.aaz5132

Subnanosecond phase transition dynamics in laser-shocked iron

H. Hwang, E. Galtier, H. Cynn, I. Eom, S. H. Chun, Y. Bang, G. C. Hwang, J. Choi, T. Kim, M. Kong, S. Kwon, K. Kang, H. J. Lee, C. Park, J. I. Lee, Yongmoon Lee, W. Yang, S. H. Shim, T. Vogt, Sangsoo KimJ. Park, Sunam Kim, D. Nam, J. H. Lee, H. Hyun, M. Kim, T. Y. Koo, C. C. Kao, T. Sekine, T. Sekine, Yongjae Lee

Earth and Space Exploration, School of (SESE)

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

30 Scopus citations

Abstract

Iron is one of the most studied chemical elements due to its sociotechnological and planetary importance; hence, understanding its structural transition dynamics is of vital interest. By combining a short pulse optical laser and an ultrashort free electron laser pulse, we have observed the subnanosecond structural dynamics of iron from high-quality x-ray diffraction data measured at 50-ps intervals up to 2500 ps. We unequivocally identify a threewave structure during the initial compression and a two-wave structure during the decaying shock, involving all of the known structural types of iron (α-, γ-, and ϵ-phase). In the final stage, negative lattice pressures are generated by the propagation of rarefaction waves, leading to the formation of expanded phases and the recovery of γ-phase. Our observations demonstrate the unique capability of measuring the atomistic evolution during the entire lattice compression and release processes at unprecedented time and strain rate.

Original language	English (US)
Article number	EAAZ5132
Journal	Science Advances
Volume	6
Issue number	23
DOIs	https://doi.org/10.1126/sciadv.aaz5132
State	Published - Jun 2020

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Hwang, H, Galtier, E, Cynn, H, Eom, I, Chun, SH, Bang, Y, Hwang, GC, Choi, J, Kim, T, Kong, M, Kwon, S, Kang, K, Lee, HJ, Park, C, Lee, JI, Lee, Y, Yang, W, Shim, SH, Vogt, T, Kim, S, Park, J, Kim, S, Nam, D, Lee, JH, Hyun, H, Kim, M, Koo, TY, Kao, CC, Sekine, T, Sekine, T & Lee, Y 2020, 'Subnanosecond phase transition dynamics in laser-shocked iron', Science Advances, vol. 6, no. 23, EAAZ5132. https://doi.org/10.1126/sciadv.aaz5132

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title = "Subnanosecond phase transition dynamics in laser-shocked iron",

abstract = "Iron is one of the most studied chemical elements due to its sociotechnological and planetary importance; hence, understanding its structural transition dynamics is of vital interest. By combining a short pulse optical laser and an ultrashort free electron laser pulse, we have observed the subnanosecond structural dynamics of iron from high-quality x-ray diffraction data measured at 50-ps intervals up to 2500 ps. We unequivocally identify a threewave structure during the initial compression and a two-wave structure during the decaying shock, involving all of the known structural types of iron (α-, γ-, and ϵ-phase). In the final stage, negative lattice pressures are generated by the propagation of rarefaction waves, leading to the formation of expanded phases and the recovery of γ-phase. Our observations demonstrate the unique capability of measuring the atomistic evolution during the entire lattice compression and release processes at unprecedented time and strain rate.",

author = "H. Hwang and E. Galtier and H. Cynn and I. Eom and Chun, {S. H.} and Y. Bang and Hwang, {G. C.} and J. Choi and T. Kim and M. Kong and S. Kwon and K. Kang and Lee, {H. J.} and C. Park and Lee, {J. I.} and Yongmoon Lee and W. Yang and Shim, {S. H.} and T. Vogt and Sangsoo Kim and J. Park and Sunam Kim and D. Nam and Lee, {J. H.} and H. Hyun and M. Kim and Koo, {T. Y.} and Kao, {C. C.} and T. Sekine and T. Sekine and Yongjae Lee",

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doi = "10.1126/sciadv.aaz5132",

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AU - Hwang, H.

AU - Galtier, E.

AU - Cynn, H.

AU - Eom, I.

AU - Chun, S. H.

AU - Bang, Y.

AU - Hwang, G. C.

AU - Choi, J.

AU - Kim, T.

AU - Kong, M.

AU - Kwon, S.

AU - Kang, K.

AU - Lee, H. J.

AU - Park, C.

AU - Lee, J. I.

AU - Lee, Yongmoon

AU - Yang, W.

AU - Shim, S. H.

AU - Vogt, T.

AU - Kim, Sangsoo

AU - Park, J.

AU - Kim, Sunam

AU - Nam, D.

AU - Lee, J. H.

AU - Hyun, H.

AU - Kim, M.

AU - Koo, T. Y.

AU - Kao, C. C.

AU - Sekine, T.

AU - Lee, Yongjae

PY - 2020/6

Y1 - 2020/6

N2 - Iron is one of the most studied chemical elements due to its sociotechnological and planetary importance; hence, understanding its structural transition dynamics is of vital interest. By combining a short pulse optical laser and an ultrashort free electron laser pulse, we have observed the subnanosecond structural dynamics of iron from high-quality x-ray diffraction data measured at 50-ps intervals up to 2500 ps. We unequivocally identify a threewave structure during the initial compression and a two-wave structure during the decaying shock, involving all of the known structural types of iron (α-, γ-, and ϵ-phase). In the final stage, negative lattice pressures are generated by the propagation of rarefaction waves, leading to the formation of expanded phases and the recovery of γ-phase. Our observations demonstrate the unique capability of measuring the atomistic evolution during the entire lattice compression and release processes at unprecedented time and strain rate.

AB - Iron is one of the most studied chemical elements due to its sociotechnological and planetary importance; hence, understanding its structural transition dynamics is of vital interest. By combining a short pulse optical laser and an ultrashort free electron laser pulse, we have observed the subnanosecond structural dynamics of iron from high-quality x-ray diffraction data measured at 50-ps intervals up to 2500 ps. We unequivocally identify a threewave structure during the initial compression and a two-wave structure during the decaying shock, involving all of the known structural types of iron (α-, γ-, and ϵ-phase). In the final stage, negative lattice pressures are generated by the propagation of rarefaction waves, leading to the formation of expanded phases and the recovery of γ-phase. Our observations demonstrate the unique capability of measuring the atomistic evolution during the entire lattice compression and release processes at unprecedented time and strain rate.

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Subnanosecond phase transition dynamics in laser-shocked iron

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