Intrinsic Structural Disorder and the Magnetic Ground State in Bulk EuTiO3

Abstract

The magnetic properties of single-crystal EuTiO3 are suggestive of nanoscale disorder below its cubic-tetragonal phase transition. We demonstrate that electric field cooling acts to restore monocrystallinity, thus confirming that emergent structural disorder is an intrinsic low-temperature property of this material. Using torque magnetometry, we deduce that tetragonal EuTiO3 enters an easy-axis antiferromagnetic phase at 5.6 K, with a first-order transition to an easy-plane ground state below 3 K. Our data is reproduced by a 3D anisotropic Heisenberg spin model.

arXiv comment5 pages, 4 figures

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• Rotomagnetic couplings influence on the magnetic properties of antiferrodistortive antiferromagnets
• Correlating magnetic structure and magnetotransport in semimetal thin films of Eu${}_{1-x}$Sm${}_x$TiO${}_3$
• Magnetic resonance study of bulk and thin film EuTiO3