Exchange-spring behavior below the exchange length in hard-soft bilayers in multidomain configurations

Spanish Ministerio de Ciencia, Innovacion y Universidades through Projects No. MAT2017-86450-C4-1-R, No. MAT2015-64110-C2-1-P, No. MAT2015-64110-C2-2-P, and No. IS2017-82415-R and by the European Commission through H2020 Project No. 720853 (AMPHIBIAN) and FP7 Project No. 310516 (NANOPYME).