Image from scanning electron microscopy with polarization analysis of the magnetization of a Co layer sandwiched between Nb layers of a Josephson junction after undergoing a field-induced spin-flop transition. The polar histogram (right) shows the distribution (in gray) of magnetization angles in the image.

From the article:

Optimization of Spin-Triplet Supercurrent in Ferromagnetic Josephson Junctions
Carolin Klose, Trupti S. Khaire, Yixing Wang, W. P. Pratt, Jr., Norman O. Birge, B. J. McMorran, T. P. Ginley, J. A. Borchers, B. J. Kirby, B. B. Maranville, and J. Unguris
Phys. Rev. Lett. 108, 127002 (2012)

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