Tuning the magnetocrystalline anisotropy in RCoPO by means of R substitution: a ferromagnetic resonance study
Abstract
We report on broad-band electron spin resonance measurements performed within the itinerant ferromagnetic phase of RCoPO (R = La, Pr, Nd and Sm). We reveal that the R substitution is highly effective in gradually introducing a sizeable easy-plane magnetocrystalline anisotropy within the Co sublattice. We explain our results in terms of a subtle interplay of structural effects and of indirect interactions between the f and d orbitals from R and Co, respectively.
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