Intrinsic Structural Disorder and the Magnetic Ground State in Bulk EuTiO3

A. P. Petrovic; Y. Kato; S. S. Sunku; T. Ito; P. Sengupta; L. Spalek; M. Shimuta; T. Katsufuji; C. D. Batista; S. Saxena; C. Panagopoulos

doi:10.1103/PhysRevB.87.064103

Intrinsic Structural Disorder and the Magnetic Ground State in Bulk EuTiO3

Strongly Correlated Electrons 2013-03-06 v1

Authors: A. P. Petrovic , Y. Kato , S. S. Sunku , T. Ito , P. Sengupta , L. Spalek , M. Shimuta , T. Katsufuji , C. D. Batista , S. Saxena , C. Panagopoulos

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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.

Keywords

EuTiO3 structural disorder magnetic ground state antiferromagnetic phase torque magnetometry Heisenberg spin model

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@article{arxiv.1204.0150,
  title  = {Intrinsic Structural Disorder and the Magnetic Ground State in Bulk EuTiO3},
  author = {A. P. Petrovic and Y. Kato and S. S. Sunku and T. Ito and P. Sengupta and L. Spalek and M. Shimuta and T. Katsufuji and C. D. Batista and S. Saxena and C. Panagopoulos},
  journal= {arXiv preprint arXiv:1204.0150},
  year   = {2013}
}

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5 pages, 4 figures

Intrinsic Structural Disorder and the Magnetic Ground State in Bulk EuTiO3

Abstract

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