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Surface Magnetic Anisotropy of Epitaxial La_{0.7}Mn_{1.3}O_{2.84} Thin Films

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Aleshkevych P., Baran M., Dyakonov V., Szymczak R., Szymczak H., Baberschke K., Lindner J., Lenz K.

Acta Physica Polonica A

2006

vol. 110

issue 1

57-70

A spin-wave resonance technique was used to collect information on elementary magnon excitations in high quality epitaxial La_{0.7}Mn_{1.3}O_{2.84} films prepared by dc-magnetron sputtering. It was found that besides bulk spin-wave modes, the spin-wave resonance spectrum includes also the surface spin waves. The value of spin-wave stiffness constant D=156 meV·Å^2 was found. The values of the surface magnetic anisotropy on both surfaces and their angular dependence were determined. The experimentally found spin-wave resonance spectra were explained based on the surface-inhomogeneity model. The effect of surface anisotropy on the spin-wave excitation conditions in epitaxial La_{0.7}Mn_{1.3}O_{2.84} films was investigated. Spin-wave resonance data give an indirect evidence of periodic charge-ordered stripes formation.

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1 Acta Physica Polonica A

1 2006

1 Aleshkevych P.

1 Baberschke K.

1 Baran M.

1 Dyakonov V.

1 Lenz K.

1 Lindner J.

1 Szymczak H.

1 Szymczak R.

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Surface Magnetic Anisotropy of Epitaxial La_{0.7}Mn_{1.3}O_{2.84} Thin Films