%0 Journal Article
%A Ye, Jingfan
%A Baldauf, Thomas
%A Mattauch, Stefan
%A Paul, Neelima
%A Paul, Amitesh
%T Topologically stable helices in exchange coupled rare-earth/rare-earth multilayer with superspin-glass like ordering
%J Communications Physics
%V 2
%N 1
%@ 2399-3650
%C London
%I Springer Nature
%M FZJ-2019-04826
%P 114
%D 2019
%X Existence of 2π-planar domain walls (DWs) are often reported for transition metal-rare-earth(TM/RE) layered systems. The magnetization process of such two-dimensional randomlyanisotropical system in the form of 2π-DWs is directly correlated with topologically stablehelices. Here, instead of TM/RE, we have investigated [Dy/Tb]10multilayers involving twodifferent anisotropic layers of rare-earth/rare-earth (RE/RE). Using magnetization and sus-ceptibility as function of temperature along with thermo-remanent magnetization measure-ments  we  have  confirmed  superspin-glass  type  of  behavior  within  this  RE/RE  system.Additionally, an exchange biasfield up to–0.88 kOe (–88 mT) was also revealed for suchrare-earth based multilayers. Interestingly, using detailed analysis of the polarized neutronreflectometry profiles, wefind evidences of superimposed helical magnetic configurationswithin both materials of Dy and Tb associated with spin-frustrated interfaces. Furthermore,magnetizationfluctuations  around  the  mean  magnetization  from  vertically  uncorrelateddomains were observed with polarized off-specular neutron scattering. We believe that coexistence of helical ground states with super spin-glass-like ordering are fundamentally instrumental for topologically stability in RE/RE systems, which in principle, can be exploited in all-spin-based technology.
%F PUB:(DE-HGF)16
%9 Journal Article
%U <Go to ISI:>//WOS:000486690700001
%R 10.1038/s42005-019-0210-0
%U https://juser.fz-juelich.de/record/865324