Magnetoelastic relaxations in EuTiO3

The multiferroic properties of EuTiO3 are greatly enhanced when a sample is strained, signifying that coupling between strain and structural, magnetic or ferroelectric order parameters is extremely important. Here resonant ultrasound spectroscopy has been used to investigate strain coupling effects, as well as possible additional phase transitions, through their influence on elastic and anelastic relaxations that occur as a function of temperature between 2 and 300 K and with applied magnetic field up to 14 T. Antiferromagnetic ordering is accompanied by acoustic loss and softening, and a weak magnetoelastic effect is also associated with the change in magnetization direction below . Changes in loss due to the influence of magnetic field suggest the existence of magnetic defects which couple with strain and may play a role in pinning of ferroelastic twin walls.

[1]  S. Saxena,et al.  Elastic and anelastic relaxations associated with phase transitions in EuTiO3 , 2014 .

[2]  T. Chatterji,et al.  CoF2: a model system for magnetoelastic coupling and elastic softening mechanisms associated with paramagnetic ↔ antiferromagnetic phase transitions , 2014, Journal of physics. Condensed matter : an Institute of Physics journal.

[3]  T. Palstra,et al.  Elastic anomalies associated with structural and magnetic phase transitions in single crystal hexagonal YMnO3 , 2014, Journal of physics. Condensed matter : an Institute of Physics journal.

[4]  G. Balakrishnan,et al.  Strain coupling in multiferroic phase transitions of samarium yttrium manganite Sm0.6Y0.4MnO3 , 2013 .

[5]  R. Harrison,et al.  Corrigendum: Elastic and anelastic relaxations accompanying magnetic ordering and spin-flop transitions in hematite, Fe2O3 , 2013, Journal of physics. Condensed matter : an Institute of Physics journal.

[6]  P. Sengupta,et al.  Electric field modulation of the tetragonal domain orientation revealed in the magnetic ground state of quantum paraelectric EuTiO3 , 2013 .

[7]  A. Weidenkaff,et al.  Emergent superstructural dynamic order due to competing antiferroelectric and antiferrodistortive instabilities in bulk EuTiO3. , 2013, Physical review letters.

[8]  Claudio Mazzoli,et al.  EuTiO 3 magnetic structure studied by neutron powder diffraction and resonant x-ray scattering , 2012 .

[9]  J. Köhler,et al.  Magnetic field enhanced structural instability in EuTiO3 , 2012, Journal of physics. Condensed matter : an Institute of Physics journal.

[10]  J. Drahokoupil,et al.  Antiferrodistortive phase transition in EuTiO3 , 2012, 1206.4137.

[11]  R. Withers,et al.  Temperature-dependent electrical, elastic and magnetic properties of sol–gel synthesized Bi0.9Ln0.1FeO3 (Ln = Nd, Sm) , 2012, Journal of physics. Condensed matter : an Institute of Physics journal.

[12]  C. Mazzoli,et al.  Role of intrinsic disorder in the structural phase transition of magnetoelectric EuTiO3 , 2011, 1111.0541.

[13]  A. Bussmann-Holder,et al.  Relation between structural instabilities in EuTiO3and SrTiO3 , 2011, 1105.6029.

[14]  V. Shvartsman,et al.  Large off-diagonal magnetoelectric coupling in the quantum paraelectric antiferromagnet EuTiO3 , 2010 .

[15]  Michael A. Carpenter,et al.  Acoustic dissipation associated with phase transitions in lawsonite, CaAl2Si2O7(OH)2·H2O , 2007 .

[16]  R. Pentcheva,et al.  Electronic structure and magnetism of EuTiO3: a first-principles study , 2007, Journal of physics. Condensed matter : an Institute of Physics journal.

[17]  C. Fennie,et al.  Magnetic and electric phase control in epitaxial EuTiO(3) from first principles. , 2006, Physical review letters.

[18]  H. Takagi,et al.  Coupling between magnetism and dielectric properties in quantum paraelectric EuTiO 3 , 2001 .

[19]  John L. Sarrao,et al.  Resonant ultrasound spectroscopy : applications to physics, materials measurements, and nondestructive evaluation , 1997 .