1.
Phys Rev Lett
; 120(9): 097201, 2018 Mar 02.
Artigo
em Inglês
| MEDLINE
| ID: mdl-29547324
RESUMO
We report the discovery of a field driven transition from a single-q to multi-q spin density wave (SDW) in the tetragonal heavy fermion compound CeAuSb_{2}. Polarized along c, the sinusoidal SDW amplitude is 1.8(2)µ_{B}/Ce for TâªT_{N}=6.25(10) K with a wave vector q_{1}=(η,η,1/2) [η=0.136(2)]. For Hâ¥c, harmonics appearing at 2q_{1} evidence a striped magnetic texture below µ_{∘}H_{1}=2.78(1) T. Above H_{1}, these are replaced by coupled harmonics at q_{1}+q_{2}=(2η,0,0)+c^{*} until µ_{∘}H_{2}=5.42(5) T, where satellites vanish and magnetization nonlinearly approaches saturation at 1.64(2)µ_{B}/Ce for µ_{∘}H≈7 T.