TY  - JOUR
AU  - Mendive-Tapia, Eduardo
AU  - dos Santos Dias, Manuel
AU  - Grytsiuk, Sergii
AU  - Staunton, Julie B.
AU  - Blügel, Stefan
AU  - Lounis, Samir
TI  - Short period magnetization texture of B20-MnGe explained by thermally fluctuating local moments
JO  - Physical review / B
VL  - 103
IS  - 2
SN  - 2469-9950
CY  - Woodbury, NY
PB  - Inst.
M1  - FZJ-2021-00284
SP  - 024410
PY  - 2021
AB  - B20-type compounds, such as MnSi and FeGe, host helimagnetic and skyrmion phases at the mesoscale, which are canonically explained by the combination of ferromagnetic isotropic interactions with weaker chiral Dzyaloshinskii-Moriya ones. Mysteriously, MnGe evades this paradigm as it displays a noncollinear magnetic state at a much shorter nanometer scale. Here we show that the length scale and volume-dependent magnetic properties of MnGe stem from purely isotropic exchange interactions, generally obtained in the paramagnetic state. Our approach is validated by comparing MnGe with the canonical B20-helimagnet FeGe. The free energy of MnGe is calculated, from which we show how triple-q magnetic states can stabilize by adding higher-order interactions.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000606722500001
DO  - DOI:10.1103/PhysRevB.103.024410
UR  - https://juser.fz-juelich.de/record/889652
ER  -