Helimagnetic Eu-based materials

Unary

• Eu metal: doi.org/10.1103/PhysRev.135.A176, doi.org/10.1103/PhysRev.167.551
• cubic (\(Im\bar{3}m\)), \(T_{\text{N}} =91\) K, \(\boldsymbol{q} = (0, 0, 0.28)\) by neutron diffraction.

Binary

• Eu(P,As)\(_3\): doi.org/10.1103/PhysRevB.41.4358, doi.org/10.1103/PhysRevB.36.2454, doi.org/10.1016/0921-4526(89)90778-3, doi.org/10.1103/PhysRevB.36.7300
• monoclinic (\(C2/m\)), \(P=18\) kbar, \(T_{\text{N}}=12\) K, \(\boldsymbol{q}=(-0.814, 0, 0.186)\) by neutron diffraction.
• EuAl\(_4\): doi.org/10.1038/s41467-022-29131-9, doi.org/10.1103/PhysRevB.107.L020410
• tetragonal (\(I4/mmm\)), 

Ternary (111)

• EuCuSb: doi.org/10.1103/PhysRevB.102.174425
• hexagonal (\(P6_3/mmc\)), 
• EuCuAs: doi.org/10.1021/jacs.3c04249, doi.org/10.1038/s41535-023-00604-4
• hexagonal (\(P6_3/mmc\)),
• EuZnGe: doi.org/10.1103/PhysRevMaterials.6.094410
• hexagonal (\(P6_3/mmc\)),
• EuPtSi: doi.org/10.7566/JPSJ.88.013702
• cubic (\(P2_13\)),

Ternary (113)

• EuNiGe\(_3\): doi.org/10.1103/PhysRevB.93.214414, arxiv.org/abs/2306.14767, doi.org/10.1038/s41467-023-43814-x
• tetragonal (\(I4mm\)), \(T_{\text{N}} =13\) K, \(\boldsymbol{q} = (0.25, 0.05, 0)\) by neutron diffraction, \(\boldsymbol{q} = (0.26, 0.052, 0)\) by resonant x-ray scattering (Eu \(L_2\) edge). Distorted triangular skyrmion-lattice state in \(H\parallel c\) (higher-harmonic peak is observed, triple-\boldsymbol{q} state is verified).
• EuIrGe\(_3\): doi.org/10.7566/JPSJ.91.073703, arxiv.org/abs/2306.12669
• tetragonal
• EuPtSi\(_3\): arxiv.org/abs/2305.07653
• tetragonal

Ternary (122)

• EuCo\(_2\)P\(_2\): doi.org/10.1016/0022-3697(92)90208-U
• tetragonal
• EuCo\(_2\)As\(_2\): doi.org/10.1021/jacs.5b12659
• tetragonal
• EuCu\(_2\)Ge\(_2\): doi.org/10.1063/1.4853095
• tetragonal (\(I4/mmm\)), \(T_{\text{N}} =12.9\) K, \(\boldsymbol{q} = (0.654, 0, 0)\), and \(\boldsymbol{q} = (0.410, 0.225, 0)\) by neutron diffraction.
• EuNi\(_2\)As\(_2\): doi.org/10.1103/PhysRevB.99.014425
• tetragonal
• EuRh\(_2\)As\(_2\): doi.org/10.1103/PhysRevB.79.100407
• tetragonal
• EuIn\(_2\)As\(_2\): doi.org/10.1038/s41467-021-21154-y, doi.org/10.1038/s41467-023-39138-5, arxiv.org/abs/2310.16018, arxiv.org/abs/2403.03022
• hexagonal (\(P6_3/mmc\))
• EuMg\(_2\)Bi\(_2\): doi.org/10.1103/PhysRevB.101.214407
• trigonal (\(P\bar{3}m1\))

Quaternary (1144)

• EuRbFe\(_4\)As\(_4\): doi.org/10.1103/PhysRevB.100.014506
• tetragonal