Influence of magnetoelectric coupling on electric field induced magnetization reversal in a composite unstrained multiferroic chain

We study theoretically the multiferroic dynamics in a composite one-dimensional system consisting of BaTiO${}_{3}$ multiferroically coupled to an iron chain. The method treats magnetization and polarization as thermodynamic quantities describable via a combination of the Landau-Lifshits-Gilbert and the Ginzburg-Landau dynamics coupled via an additional term in the total free energy density. This term stems from the multiferroic interaction at the interface. For a wide range of strengths of this coupling, we predict the possibility of obtaining a well-developed hysteresis in the ferromagnetic part of the system induced by an external electric field. The dependence of the reversal modes on the electric field frequency is also investigated and we predict a considerable stability of the magnetization reversal for frequencies in the range of 0.5--12 GHz.

[1]  R. Ramesh,et al.  Magnetoelectric Coupling Effects in Multiferroic Complex Oxide Composite Structures , 2010, Advanced materials.

[2]  R. Ramesh,et al.  Epitaxial BiFeO3 Multiferroic Thin Film Heterostructures , 2003, Science.

[3]  A. Demkov,et al.  Interfacial magnetoelectric coupling in tricomponent superlattices , 2009, 0912.3492.

[4]  A Gloter,et al.  Interface-induced room-temperature multiferroicity in BaTiO₃. , 2011, Nature materials.

[5]  Vitalii L. Ginzburg,et al.  Теория сегнетоэлектрических явлений , 1949 .

[6]  Tae Won Noh,et al.  Polarization Relaxation Induced by a Depolarization Field in Ultrathin Ferroelectric BaTiO 3 Capacitors , 2005 .

[7]  P. Horley,et al.  Finite-size effects on the magnetoelectric response of field-driven ferroelectric/ferromagnetic chains , 2011, 1104.1269.

[8]  J. Hlinka,et al.  Phenomenological model of a 90° domain wall inBaTiO3-type ferroelectrics , 2006 .

[9]  A. Bratkovsky,et al.  Continuous theory of ferroelectric states in ultrathin films with real electrodes , 2008, 0801.1669.

[10]  M. Bibes,et al.  Multiferroics: towards a magnetoelectric memory. , 2008, Nature materials.

[11]  R. Ramesh,et al.  Multiferroics: progress and prospects in thin films. , 2007, Nature materials.

[12]  T. Gilbert A phenomenological theory of damping in ferromagnetic materials , 2004, IEEE Transactions on Magnetics.

[13]  P. Horley,et al.  Polarization and magnetization dynamics of a field-driven multiferroic structure , 2010, Journal of physics. Condensed matter : an Institute of Physics journal.

[14]  C. Nan,et al.  Multiferroic Magnetoelectric Composites: Historical Perspective, Status, and Future Directions , 2008, Progress in Advanced Dielectrics.

[15]  Ab initio study of magnetoelectricity in composite multiferroics , 2010 .

[16]  T. Gilbert A Lagrangian Formulation of the Gyromagnetic Equation of the Magnetization Field , 1955 .

[17]  A. F. Devonshire XCVI. Theory of barium titanate , 1949 .

[18]  M. Fiebig Revival of the magnetoelectric effect , 2005 .

[19]  E. Tsymbal,et al.  Ferroelectric control of magnetism in BaTiO3 /Fe heterostructures via interface strain coupling , 2007 .

[20]  J. Rivera A short review of the magnetoelectric effect and related experimental techniques on single phase (multi-) ferroics , 2009 .

[21]  E. Wang,et al.  Magnetoelectric coupling and electric control of magnetization in ferromagnet/ferroelectric/ normal-metal superlattices , 2009, 0910.1031.

[22]  I. Mertig,et al.  Structural secrets of multiferroic interfaces. , 2011, Physical review letters.

[23]  J. Coey,et al.  Magnetism and Magnetic Materials , 2001 .

[24]  W. J. Merz The Electric and Optical Behavior of BaTi O 3 Single-Domain Crystals , 1949 .

[25]  J. Hlinka Mobility of Ferroelastic Domain Walls in Barium Titanate , 2007 .

[26]  N. Mathur,et al.  Multiferroic and magnetoelectric materials , 2006, Nature.

[27]  Y. Srivastava,et al.  Physical Kinetics of Ferroelectric Hysteresis , 2001, cond-mat/0106549.

[28]  N. D. Mathur,et al.  Ferroelectric Control of Spin Polarization , 2010, Science.

[29]  Junhao Chu,et al.  Surface magnetoelectric effect in ferromagnetic metal films. , 2008, Physical review letters.