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Strain and anisotropy effects on spin waves in epitaxial La0.67Sr0.33MnO3 films

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5 Author(s)
Talbayev, D. ; Department of Applied Science, The College of William and Mary, Williamsburg, Virginia 23187-8795 ; Zhao, H. ; Lupke, G. ; Chen, J.
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Uniform magnetization precession in the ferromagnetic state of La0.67Sr0.33MnO3 films grown on different substrates is investigated in the 50–300 K temperature range in magnetic fields of up to 1.3 T. The precession was induced by an optical pump pulse and probed by a time-delayed pulse using magneto-optical Kerr effect. The measured field dependence of the precession frequency agrees well with calculation from the Landau-Lifshitz-Gilbert equation using different uniaxial anisotropies for different substrates. The field-dependent relaxation times of the exponentially decaying precession are in 100–1400 ps range.

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Applied Physics Letters  (Volume:86 ,  Issue: 18 )