ИСТИНА

Triplet pairing in oxide superconducting/ferromagnetic (S/F) heterostructures with non-collinear magnetization state was experimentally studied [1,2]. Heterostructures of Au/La0.7Sr0.3MnO3/SrRuO3/YBa2Cu3O7-delta composition have been prepared using the pulsed laser ablation. The high quality of the crystal and layers growth has been revealed by using X-ray diffraction and reflectometry techniques. In particular, the crystallographic lattice parameters of ferromagnetic interlayers (LSMO and SRO) differ by 1% from the one for the reference films deposited directly on the substrate. The non-collinear magnetic state of the heterostructure has been revealed by means of SQUID magnetometry and Polarized Neutron Reflectometry measurements. We have observed the superconducting current in mesa-structures fabricated by deposition of a superconducting Nb layer on top of the heterostructure, patterned by photolithography and ion-beam etching. The Josephson effect observed in the mesa- structures is explained by the penetration of the long-range triplet component of the superconducting order parameter into the magnetic interlayer. Additionally we have observed increase of the magnetic moment below TC. Origin of the effect is discussed in the frame of inverse proximity effect [3] and paramagnetic Meissner response of the triplet condensate [4] [1] G.A. Ovsyannikov, A.E. Sheierman, A.V. Shadrin, et al, JETP Letters 97, 145, (2013) [2] Yu. N. Khaydukov, G.A. Ovsyannikov, A.E. Sheyerman et al. In preparation. [3] N.G. Pugach and A.I. Buzdin Appl. Phys. Lett. 101, 242602 (2012) [4] M. Alidoust, K. Halterman, J. Linder, Phys. Rev. B 89, 054508 (2014)