Room temperature skyrmion ground state stabilized through interlayer exchange coupling

By Gong Chen, A. Mascaraque, A. N’Diaye, A. Schmid. 2015

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Current-induced spin-orbit torques in ferromagnetic and antiferromagnetic systems (2018, background): “Metastable magnetic skyrmions have been recently obtained at room temperature in transition metal multilayers (Boulle et al., 2016; Chen et al., 2015; Hrabec et al., 2017; Jiang et al., 2015; Moreau-Luchaire et al., 2016; Pollard et al., 2017; Woo et al., 2016).”
Skyrmions in magnetic multilayers (2017, background): “Ir provides another affirmative evidence, which has a negligible SHE [150] but a significant (negative) interfacial DMI [43], as opposed to Pt, and Ta [42, 135, 147, 151].”
Tunable room-temperature magnetic skyrmions in Ir/Fe/Co/Pt multilayers. (2016, unknown): “Co) is sand-wiched between different SOC metals (e.g. Pt and Ir/Ta) to produce a net effective DMI 20–22 , and multiple repeats of such trilayers stabilise columnar skyrmions through interlayer exchange coupling 23,24 .”
Skyrmion-electronics: writing, deleting, reading and processing magnetic skyrmions toward spintronic applications (2019, methodology): “As shown in figure 4(g), Chen et al imaged the room-temperature magnetic skyrmions in the Fe/Ni/Cu/Ni/Cu(0 0 1) multilayers using the spinpolarized low-energy electron microscopy (SPLEEM) [125], where the exchange coupling across non-magnetic spacer layers is responsible for the stabilization of s”