Multi-Q mesoscale magnetism in CeAuSb${}_2$

Abstract

We report the discovery of a field driven transition from a striped to woven Spin Density Wave (SDW) in the tetragonal heavy fermion compound CeAuSb${}_2$. Polarized along $\mathbf{c}$, the sinusoidal SDW amplitude is 1.8(2) ${\mu }_B$/Ce for $T\ll T_N$=6.25(10) K with wavevector ${\mathbf{q}}_1=(\eta ,\eta ,\frac{1}{2})$ ($\eta =0.136(2)$). For $\mathbf{H}\parallel \mathbf{c}$, harmonics appearing at $2{\mathbf{q}}_1$ evidence a striped magnetic texture below ${\mu }_{\circ }{H}_{c1}=2.78(1)$ T. Above $H_{c1}$, these are replaced by woven harmonics at ${\mathbf{q}}_1+{\mathbf{q}}_2=(2\eta ,0,0)+{\mathbf{c}}^{\ast }$ until ${\mu }_{\circ }{H}_{c2}=5.42(5)$ T, where satellites vanish and magnetization non-linearly approaches saturation at 1.64(2) ${\mu }_B$/Ce for ${\mu }_{\circ }H\approx 7$ T.

arXiv comment5 pages, 4 figures

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• Stabilization mechanisms of magnetic skyrmion crystal and multiple-$Q$ states based on momentum-resolved spin interactions
• Competing spin modulations in a magnetically frustrated semimetal EuCuSb
• Widely-sweeping magnetic field-temperature phase diagrams for skyrmion-hosting centrosymmetric tetragonal magnets
• Nematic state in CeAuSb${}_2$
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• Continuous spin excitations in the three-dimensional frustrated magnet K2Ni2(SO4)3
• Rigid platform for applying large tunable strains to mechanically delicate samples
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• Anomalous metamagnetism in the low carrier density Kondo lattice YbRh3Si7
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• Effect of uniaxial stress on the magnetic phases of CeAuSb${}_2$
• Electronic and magnetic properties of stoichiometric CeAuBi${}_2$
• Stability of Skyrmion Crystal Phase in Centrosymmetric Distorted Triangular-Lattice Antiferromagnets
• Coupling of optical phonons with Kondo effect and magnetic orders in antiferromagnetic Kondo lattice CeAuSb${}_2$
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• Magnetic field-induced softening of spin waves and hard-axis order in Kondo-lattice ferromagnet CeAgSb${}_2$
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• Magnetic bubble crystal in tetragonal magnets
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• Inverse melting and intertwined orders in PrCuSb${}_2$
• Effects of external pressure on the narrow gap semiconductor Ce${}_3$Cd${}_2$As${}_6$
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