Abstract
We report on magnetic and magnetoelastic measurements for a 5000 Å (110)SmFe2 thin film, which was successfully analyzed by means of a point charge modelfor describing the effect of the epitaxial growth in this kind of system. Some ofthe main conclusions of the Mössbauer and magnetoelastic results and the newmagnetization results up to 5 T allow us to get a full description of the crystalelectric field, exchange, and magnetoelastic behavior in this compound. So, newsingle-ion parameters are obtained for the crystal field interaction of samarium ions,A4⟨r4⟩ = +755 K/ion andA6⟨r6⟩ = −180 K/ion, and new single-ion magnetoelastic coupling MPa and MPa, which represent the tetragonal and the in-plane shear deformations, respectively.Moreover, the new thermal behavior of the samarium magnetic moment, the exchangecoupling parameter, and the magnetocrystalline anisotropy of the iron sublattice areobtained too. From these, the softening of the spin reorientation transition with respect tothe bulk case could be accounted for.
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