Frustrated skyrmions in reentrant spin glasses: checking the Skyrmion lattice by SANS
Skyrmions are considered as the possible building blocks of future electronics. These vortex-like spin textures mostly observed in chiral magnets, are now searched for in frustrated magnets, but not observed yet. Actually, similar spin textures have been seen in the eighties in metallic reentrant spin glasses. We propose to study these frustrated Skyrmions with a new geometry of the magnetic field, perpendicular to the scattering plane, by comparing the scattering in amorphous [Fe(1-x)Mnx]0.75P0.16B0.06Al0.03 (x=0.235) hereafter called a-FeMn and in Ni0.81Mn0.19 single crystal. We will check the possibility of the frustrated SK lattice in NiMn, and confirm the isotropy of the vortex structure in a-FeMn. We will also check the presence of scaling laws governing the vortex size in a field range (up to 4T) not explored before. This information is important to evaluate the structure factor of these "frustrated skyrmions" in comparison with the "magnetic skyrmions" observed in chiral magnets such as MnSi.
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I. MIREBEAU; BANNENBERG Lars Johannes; CUBITT Robert; DEUTSCH Maxime; MARTIN Nicolas and PAPPAS Catherine. (2015). Frustrated skyrmions in reentrant spin glasses: checking the Skyrmion lattice by SANS. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-42-409
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