Strain and magnetic field induced spin‐structure transitions in multiferroic BiFeO3 by Agbelele, A, Sando, D, Toulouse, C, Paillard, C, Johnson, R, Rüffer, R, Popkov, A, Carrétéro, C, Rovillain, P, Le Breton, J, Dkhil, B, Cazayous, M, Gallais, Y, Méasson, M, Sacuto, A, Manuel, P, Zvezdin, A, Barthélémy, A, Juraszek, J, Bibes, M