Evidence for long-ranged superconductor proximity effects in superconductor-ferromagnetic (S-F) systems has recently been reported. This effect is attributed to the formation of triplet-pair correlations due to various forms of magnetic inhomogeneities at S-F interfaces. In order to investigate this conjecture we performed scanning tunneling spectroscopy measurements on La_2/3Ca_1/3MnO₃ (LCMO) ferromagnetic thin-films grown on high temperature oxide superconducting films of YBa₂Cu₃O_7-δ (YBCO) or Pr_1.85Ca_0.15CuO₄ (PCCO) as a function of magnetic field. We observe a strong correlation between the enhancement and suppression of superconductor-related spectral features measured on LCMO to magnetic inhomogeneity under the influence of external magnetic field. This corroborates theoretical predictions regarding the role played by magnetic inhomogeneities in promoting triplet-pairing at S-F interfaces.