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- W2039104927 abstract "The first and second magnetic anisotropy constants ${K}_{1}$ and ${K}_{2}$ and the spin wave (SW) stiffness constant ${D}_{mathrm{BLS}}$ of epitaxial $(101ifmmodebarelsetextasciimacronfi{}0)$ Co films of $450ifmmodepmelsetextpmfi{}10mathrm{AA{}}$ in thickness have been determined by Brillouin light scattering (BLS) at room temperature in magnetic fields of up to 5.0 kOe. We employed three scattering geometries: (A) magnetic fields applied along the in-plane easy direction, (B) magnetic fields applied along the in-plane hard direction, and (C) a constant magnetic field rotated from the in-plane easy direction to the in-plane hard direction. We always examined SW's propagating perpendicular to the magnetic field. Numerical analyses of the SW frequencies by a continuum dipole-exchange model with the magnetic anisotropy allowed us to obtain values of ${D}_{mathrm{BLS}}=(3.46ifmmodepmelsetextpmfi{}0.35)ifmmodetimeselsetexttimesfi{}{10}^{ensuremath{-}9}mathrm{Oe}{mathrm{cm}}^{2},$ ${K}_{1}=(3.45ifmmodepmelsetextpmfi{}0.1)ifmmodetimeselsetexttimesfi{}{10}^{6}{mathrm{e}mathrm{r}mathrm{g}/mathrm{c}mathrm{m}}^{3}$ and ${K}_{2}=(0.90ifmmodepmelsetextpmfi{}0.1)ifmmodetimeselsetexttimesfi{}{10}^{6}{mathrm{e}mathrm{r}mathrm{g}/mathrm{c}mathrm{m}}^{3}.$ These values are in good agreement with the BLS values reported for the $(101ifmmodebarelsetextasciimacronfi{}0)$ epitaxial Co films by M. Grimsditch et al. [Phys. Rev. B 56, 2617 (1997)]. We also measured temperature development of film magnetization using a superconducting quantum inerference device magnetometer in a temperature range between 4.2 and 100 K. The temperature development of magnetization obeys the ${T}^{3/2}$ law and can be well reproduced by SW theory with BLS values of the magnetic constants." @default.
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- W2039104927 date "2003-04-30" @default.
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- W2039104927 title "Brillouin light scattering from spin waves in epitaxial hcp Co films" @default.
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- W2039104927 doi "https://doi.org/10.1103/physrevb.67.134435" @default.
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