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

被引：16

作者：

Kantner, C. L. S. ^{[1
,2
]}

Langner, M. C. ^{[1
,2
]}

Siemons, W. ^{[3
]}

Blok, J. L. ^{[4
]}

Koster, G. ^{[4
]}

Rijnders, A. J. H. M. ^{[4
]}

Ramesh, R. ^{[1
,3
]}

Orenstein, J. ^{[1
,2
]}

机构：

[1] Univ Calif Berkeley, Dept Phys, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Lawrence Berkeley Lab, Div Mat Sci, Berkeley, CA 94720 USA

[3] Univ Calif Berkeley, Dept Mat Sci & Engn, Berkeley, CA 94720 USA

[4] Univ Twente, MESA Inst Nanotechnol, NL-7500 AE Enschede, Netherlands

来源：

PHYSICAL REVIEW B | 2011年 / 83卷 / 13期

关键词：

DYNAMICS;

D O I：

10.1103/PhysRevB.83.134432

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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 similar to 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(B)T(c), indicating a common origin for these phenomena.

引用

页数：6

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