Tc-oscillations of a superconducting heterostructure OC/V/Fe by oscillating couple in a fragment OC=Fe/Cr/Fe

Superconducting transition temperature (Tc) and FMR were measured in heterostructure OC/V/Fe, were OC=Fe/Cr/Fe. Giant oscillations of Tc depending on a Cr-thickness were detected. Probable reasons of Tc-oscillation are discussed - periodic cancellation of pair-breacking exchange fields in superconducting V-layer or in fragment Fe/Cr/Fe.