TY  - JOUR
AU  - Ye, Jingfan
AU  - Baldauf, Thomas
AU  - Mattauch, Stefan
AU  - Paul, Neelima
AU  - Paul, Amitesh
TI  - Topologically stable helices in exchange coupled rare-earth/rare-earth multilayer with superspin-glass like ordering
JO  - Communications Physics
VL  - 2
IS  - 1
SN  - 2399-3650
CY  - London
PB  - Springer Nature
M1  - FZJ-2019-04826
SP  - 114
PY  - 2019
AB  - 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.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000486690700001
DO  - DOI:10.1038/s42005-019-0210-0
UR  - https://juser.fz-juelich.de/record/865324
ER  -