Intrinsic Structural Disorder and the Magnetic Ground State in Bulk EuTiO3

Details Intrinsic Structural Disorder and the Magnetic Ground State in Bulk EuTiO3 Intrinsic Structural Disorder and the Magnetic Ground State in Bulk EuTiO3

2012-04-01

arxiv.org/abs/1204.0150v1

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 4 figures

Scientific paper

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.

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