  It has been predicted theoretically that an unconventional odd-frequency
spin-triplet component of superconducting order parameter can be induced in
multilayered ferromagnetic structures with non-collinear magnetization. In this
work we study experimentally nano-scale devices, in which a ferromagnetic spin
valve is embedded into a Josephson junction. We demonstrate two ways of in-situ
analysis of such Josephson spin valves: via magnetoresistance measurements and
via in-situ magnetometry based on flux quantization in the junction. We observe
that supercurrent through the device depends on the relative orientation of
magnetization of the two ferromagnetic layers and is enhanced in the
non-collinear state of the spin valve. This provides a direct prove of
controllable generation of the spin-triplet superconducting component in a
ferromagnet.
