Magnetic and magnetotransport characterization of La sub(0.7)Sr sub(0.3)MnO sub(3)/YBCO/La sub(0.7)Sr sub(0.3) MnO sub(3)/YBCO spin valve

We present magnetoresistance measurements on La sub(0.7)Sr sub(0.3)MnO sub(3)/YBCO/La sub(0.7)Sr sub(0.3)MnO sub(3)/YBCO (L1/Y1/L2/Y) heterostructure. The Ll/Y1/L2/Y spin valve shows large magnetoresistance peaks in coercive field at temperatures below the onset of the superconducting transition. The rotation in parallel magnetic field demonstrates a change of magnetoresistance; simultaneously the transition temperature to superconducting state T sub(c0)(H=450 Oe, beta ) exhibits nonmonotonic dependence due to change of noncolinearity of magnetic moments of LSMO layers. Nonmonotonic change of the transition temperature as a function of angle is interpreted as a signature of generation of the triplet component superconducting phase in the Ll/Y1/L2/Y heterostructure.