Magnetic field enhanced structural instability in EuTiO_{3}

Z. Guguchia; H. Keller; J. Kohler; A. Bussmann-Holder

doi:10.1088/0953-8984/24/49/492201

Magnetic field enhanced structural instability in EuTiO_{3}

Materials Science 2013-01-28 v1 Strongly Correlated Electrons

Authors: Z. Guguchia , H. Keller , J. Kohler , A. Bussmann-Holder

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Abstract

EuTiO_{3} undergoes a structural phase transition from cubic to tetragonal at T_S = 282 K which is not accompanied by any long range magnetic order. However, it is related to the oxygen ocathedra rotation driven by a zone boundary acoustic mode softening. Here we show that this displacive second order structural phase transition can be shifted to higher temperatures by the application of an external magnetic field (increased by 4 K for mu_{0}H = 9 T). This observed field dependence is in agreement with theoretical predictions based on a coupled spin-anharmonic-phonon interaction model.

Keywords

magnetic structure magnetization magnetic phase transitions

Cite

@article{arxiv.1207.4698,
  title  = {Magnetic field enhanced structural instability in EuTiO_{3}},
  author = {Z. Guguchia and H. Keller and J. Kohler and A. Bussmann-Holder},
  journal= {arXiv preprint arXiv:1207.4698},
  year   = {2013}
}

Comments

4 pages, 4 figures

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