We have performed temperature dependent tunneling conductance spectroscopy on Fe/Ag/Bi2Sr2CaCu2O 8+δ (BSCCO) planar junctions.The multilayered Fe counterelectrode was designed to probe the proximity region of the ab-plane of BSCCO. The spectra manifested a coherent oscillatory behavior with magnitude and sign dependent on the energy, decaying with increasing distance from the junction barrier, in conjunction with the theoretical predictions involving d-wave superconductors coupled with ferromagnets. The conductance oscillates in antiphase at E = 0 and E = ±∆. Spectral features characteristic to a broken time-reversal pairing symmetry are detected and they do not depend on the geometrical characteristics of the ferromagnetic film.PACS numbers: 74.45.+c, 74.50.+r, 75.70.-i In recent years numerous theoretical and experimental studies have been devoted to the spin polarized transport in ferromagnet(FM)-superconductor(SC) structures. This interest is equally motivated by the rapidly developing applications, e.g. in quantum twolevel systems (qubits) based on phase shifts [1], as well as by the very interesting physics involving unconventional superconducting states. The exchange energy h in the ferromagnet leads to a spatially inhomogeneous state with the order parameter presenting phase changes by π in the proximity region at the interface with the SC. Such a modulated state is called Larkin-OvchinnikovFulde-Ferrell (LOFF) from the names of the authors who first predicted it [2]. In the FM, the Cooper paired electrons have different energies and Fermi momenta, so they dephase on a scale of several ferromagnetic coherence lengths. Consequently, this region presents a diversity of intensely explored phenomena like spatially dumped oscillations of the density of states (DOS) and gapless superconductivity [3]- [6], oscillations of the superconducting critical temperature T c and critical current I c with the thickness of the FM electrode in layered systems [7,8], or asymmetric zero-bias conductance peak (ZBCP) splitting [9].An extensive attention was dedicated to the LOFF state arising in junctions between conventional SC's and FM films of variable thickness. As example, the measurements on Al/Al 2 O 3 /PdNi/Nb junctions reported by the Orsay group [7] clearly show the difference in the conductance spectra at two different locations in the proximity region, indicating the order parameter change from positive (0-state) to negative values (π-state). However, the data originated from experiments involving high-Tc superconductors (HTSC) is rather scarce, even if it could be conclusive about the interaction between ferromagnetism and a more complex form of superconductivity. In particular, the superconductivity mechanism in the cuprates is far from being fully understood. According to a series of phase sensitive experiments [10] the symmetry of the order parameter is d-wave, pure or mixed with a secondary s or d component [11]. It also seems that the antiferromagnetic spin plays an important role in the pairing mechanism ...