Fig. 1: Heat current-driven transformations of magnetic spin textures in (Fe0.63Ni0.3Pd0.07)3P.
From: Heat current-driven topological spin texture transformations and helical q-vector switching
Schematics of temperature gradient (\(\nabla T\))-induced transformations of (a) a two modulation \({{{{{\bf{q}}}}}}\)-vector helical state into a single \({{{{{\bf{q}}}}}}\)-vector state at zero field (\({B}_{z}=0\ {{{{{\rm{mT}}}}}}\)), (b) a thermodynamically stable antiskyrmion (Asky, topological charge \(N=+ 1\)) into a skyrmion (Sky, \(N=-1\)) via a non-topological bubble (NTB, \(N=0\)) while \({B}_{z} \, > \, 0\ {{{{{\rm{mT}}}}}}\), and (c) a metastable Sky into an Asky via a NTB while \({B}_{z}=0\ {{{{{\rm{mT}}}}}}\). Measured in-plane magnetic induction maps of (d) helical stripes at zero field with CW and CCW helicities aligned with \({{{{{\bf{q}}}}}}\)-vectors parallel to the \([110]\) and \([\bar{1}10]\) crystal axes, respectively, (e) an Asky with topological charge \(N=+ 1\), and (f) a Sky with topological charge \(N=-1\), all acquired in the FIB-fabricated (Fe0.63Ni0.3Pd0.07)3P heating devices used in this study. Scale bars \(1\ {{\upmu }}{{{{{\rm{m}}}}}}\) in (d) and \(0.1\ {{\upmu }}{{{{{\rm{m}}}}}}\) in (e, f).
