Quantum paraelectric ${\mathrm{EuTiO}}_3$ is a candidate multiferroic quantum critical material, which displays unique magnetoelectric and magnetoelastic couplings that may be enhanced when tuned towards ferromagnetic and ferroelectric quantum critical points. However, the ground state remains challenging to identify precisely due to the limitations of current techniques. To investigate low temperature magnetism of the compound, we used scanning SQUID microscopy to image local magnetic flux and susceptibility of a ${\mathrm{EuTiO}}_3$ thin film deposited on ${\mathrm{SrTiO}}_3$. We found weak ferromagnetic domains that form below the film's Néel transition. Additionally, we show that magnetic domain texture and dynamics are significantly influenced by how structural domains crystallize. Our results show a novel noncollinear magnetic texture in a ${\mathrm{EuTiO}}_3$ thin film and suggest a potential route to control magnetic domain texture by manipulating structural domains. Such aspects may have implications for multiferroic quantum-critical behavior predicted for this material.

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• Magnetic order
• Antiferromagnets
• Noncollinear magnets
• Paraelectrics
• AC susceptibility measurements
• Scanning probe microscopy