Determination of the spin-flip time in ferromagnetic SrRuO3 from time-resolved Kerr measurements

C.L.S. Kantner; M.C. Langner; W. Siemons; J.L. Blok; G. Koster; A.J.H.M. Rijnders; R. Ramesh; J. Orenstein

doi:10.1103/PhysRevB.83.134432

Determination of the spin-flip time in ferromagnetic SrRuO₃ from time-resolved Kerr measurements

C.L.S. Kantner, M.C. Langner, W. Siemons, J.L. Blok, G. Koster, A.J.H.M. Rijnders, R. Ramesh, J. Orenstein

Inorganic Materials Science

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Abstract

We report time-resolved Kerr effect measurements of magnetization dynamics in ferromagnetic SrRuO₃. We observe that the demagnetization time slows substantially at temperatures within 15 K of the Curie temperature, which is ~150 K. We analyze the data with a phenomenological model that relates the demagnetization time to the spin-flip time. In agreement with our observations, the model yields a demagnetization time that is inversely proportional to T−T_c. We also make a direct comparison of the spin-flip rate and the Gilbert damping coefficient, showing that their ratio is very close to k_BT_c, indicating a common origin for these phenomena.

Original language	English
Article number	134432
Number of pages	6
Journal	Physical review B: Condensed matter and materials physics
Volume	83
DOIs	https://doi.org/10.1103/PhysRevB.83.134432
Publication status	Published - 2011

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title = "Determination of the spin-flip time in ferromagnetic SrRuO3 from time-resolved Kerr measurements",

abstract = "We report time-resolved Kerr effect measurements of magnetization dynamics in ferromagnetic SrRuO3. We observe that the demagnetization time slows substantially at temperatures within 15 K of the Curie temperature, which is ~150 K. We analyze the data with a phenomenological model that relates the demagnetization time to the spin-flip time. In agreement with our observations, the model yields a demagnetization time that is inversely proportional to T−Tc. We also make a direct comparison of the spin-flip rate and the Gilbert damping coefficient, showing that their ratio is very close to kBTc, indicating a common origin for these phenomena.",

author = "C.L.S. Kantner and M.C. Langner and W. Siemons and J.L. Blok and G. Koster and A.J.H.M. Rijnders and R. Ramesh and J. Orenstein",

year = "2011",

doi = "10.1103/PhysRevB.83.134432",

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T1 - Determination of the spin-flip time in ferromagnetic SrRuO3 from time-resolved Kerr measurements

AU - Kantner, C.L.S.

AU - Langner, M.C.

AU - Siemons, W.

AU - Blok, J.L.

AU - Koster, G.

AU - Rijnders, A.J.H.M.

AU - Ramesh, R.

AU - Orenstein, J.

PY - 2011

Y1 - 2011

N2 - We report time-resolved Kerr effect measurements of magnetization dynamics in ferromagnetic SrRuO3. We observe that the demagnetization time slows substantially at temperatures within 15 K of the Curie temperature, which is ~150 K. We analyze the data with a phenomenological model that relates the demagnetization time to the spin-flip time. In agreement with our observations, the model yields a demagnetization time that is inversely proportional to T−Tc. We also make a direct comparison of the spin-flip rate and the Gilbert damping coefficient, showing that their ratio is very close to kBTc, indicating a common origin for these phenomena.

AB - We report time-resolved Kerr effect measurements of magnetization dynamics in ferromagnetic SrRuO3. We observe that the demagnetization time slows substantially at temperatures within 15 K of the Curie temperature, which is ~150 K. We analyze the data with a phenomenological model that relates the demagnetization time to the spin-flip time. In agreement with our observations, the model yields a demagnetization time that is inversely proportional to T−Tc. We also make a direct comparison of the spin-flip rate and the Gilbert damping coefficient, showing that their ratio is very close to kBTc, indicating a common origin for these phenomena.

U2 - 10.1103/PhysRevB.83.134432

DO - 10.1103/PhysRevB.83.134432

M3 - Article

SN - 1098-0121

VL - 83

JO - Physical review B: Condensed matter and materials physics

JF - Physical review B: Condensed matter and materials physics

M1 - 134432

ER -

Determination of the spin-flip time in ferromagnetic SrRuO3 from time-resolved Kerr measurements

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Determination of the spin-flip time in ferromagnetic SrRuO₃ from time-resolved Kerr measurements