(color online) The room temperature IP and OOP hysteresis loops (a)–(c), families of FORCs (d)–(f), and MFM images in the as-prepared state (g)–(i). For the Nd–Dy–Fe–Co–B single layer (a), (d), and (g), the well-coupled sample (b), (e), and (h), and the decoupled sample (c), (f), and (i), respectively.^[48]