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We theoretically study noncoplanar spin textures in polar magneticconductors. Starting from the Kondo lattice model with the Rashba spin-orbitcoupling, we derive an effective spin model with generalizedRuderman-Kittel-Kasuya-Yosida interactions including the anisotropic andantisymmetric exchange interactions. By performing simulated annealing for theeffective model, we find that a vortex crystal of N\'eel type is stabilizedeven in the absence of a magnetic field. Moreover, we demonstrate that aBloch-type vortex crystal, which is usually associated with the Dresselhausspin-orbit coupling, can also be realized in our Rashba-based model. A magneticfield turns the vortex crystals into N\'eel- and Bloch-type skyrmion-likecrystals. Our results underscore that the interplay between the spin-orbitcoupling and itinerant magnetism brings fertile possibilities of noncoplanarmagnetic orderings.

N\'eel- and Bloch-Type Magnetic Vortices in Rashba Metals