Correlation of structure and spin–phonon coupling in (La, Nd) doped BiFeO3 films

We studied the effect of structural change on the spin–phonon coupling in doped BiFeO3 (BFO) films (Bi0.8La0.1Nd0.1FeO3) grown on SrTiO3 (001) substrate. The temperature-dependent Raman studies show phonon anomalies in the vicinity of magnetic ordering temperature TN owing to the spin–phonon coupling. Doped films exhibit strong anomalies in the line widths of Raman bands around TN revealing the presence of strong spin–lattice coupling. The modification in structure as a result of A-site doping in BFO films plays an important role in controlling the nature of spin–phonon coupling. Copyright © 2014 John Wiley & Sons, Ltd.

[1]  B. Cho,et al.  Raman studies of spin-phonon coupling in hexagonal BaFe12O19 , 2013 .

[2]  S. Trimper,et al.  Phonon excitations and magnetoelectric coupling in multiferroic RMn2O5 , 2013 .

[3]  A. Ayala,et al.  Spin-phonon coupling in Y2NiMnO6 double perovskite probed by Raman spectroscopy , 2013, 1301.6925.

[4]  A. Sundaresan,et al.  Spin-phonon coupling in multiferroic RCrO3 (R-Y, Lu, Gd, Eu, Sm): A Raman study , 2012, 1205.3551.

[5]  D. Vanderbilt,et al.  Spin-phonon coupling effects in transition-metal perovskites: A DFT + U and hybrid-functional study , 2011, 1112.5205.

[6]  A. Slodczyk,et al.  Probing the Nanodomain Origin and Phase Transition Mechanisms in (Un)Poled PMN-PT Single Crystals and Textured Ceramics , 2010, Materials.

[7]  R. Das,et al.  Temperature-Dependent Raman and Dielectric Spectroscopy of BiFeO3 Nanoparticles: Signatures of Spin-Phonon and Magnetoelectric Coupling , 2010 .

[8]  D. Mazumdar,et al.  Polarized Raman spectroscopy of nearly tetragonal BiFeO3 thin films , 2010, 1003.2828.

[9]  R. Katiyar,et al.  Phonon spectroscopy near phase transition temperatures in multiferroic BiFeO 3 epitaxial thin films , 2010, 1001.1997.

[10]  Suk‐Joong L. Kang,et al.  Temperature‐dependent Raman scattering studies of polycrystalline BiFeO3 bulk ceramics , 2009 .

[11]  J. A. Moreira,et al.  Spin-phonon coupling and magnetoelectric properties: EuMnO 3 versus GdMnO 3 , 2009 .

[12]  J. Robertson,et al.  beta phase and gamma-beta metal-insulator transition in multiferroic BiFeO[sub 3] , 2008 .

[13]  Xiaomei Lu,et al.  Effect of Nd dopant on magnetic and electric properties of BiFeO3 thin films prepared by metal organic deposition method , 2006 .

[14]  K. Baba-kishi,et al.  Multiferroic Properties of Single‐Phase Bi0.85La0.15FeO3 Lead‐Free Ceramics , 2006 .

[15]  S. Or,et al.  Structural transformation and ferroelectromagnetic behavior in single-phase Bi1−xNdxFeO3 multiferroic ceramics , 2006 .

[16]  Jenn–Ming Wu,et al.  Influence of La doping in multiferroic properties of BiFeO3 thin films , 2006 .

[17]  Min Gyu Kim,et al.  Epitaxially grown La-modified BiFeO3 magnetoferroelectric thin films , 2005 .

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

[19]  M. Fiebig,et al.  Observation of coupled magnetic and electric domains , 2002, Nature.

[20]  I. Torriani,et al.  Magnetic ordering effects in the Raman spectra of La 1-x Mn 1-x O 3 , 1999 .

[21]  P. Fischer,et al.  Temperature dependence of the crystal and magnetic structures of BiFeO3 , 1980 .

[22]  A. A. Frolov,et al.  Composition-induced transition of spin-modulated structure into a uniform antiferromagnetic state in a Bi1−xLaxFeO3 system studied using 57Fe NMR , 2003 .

[23]  D. Rousseau,et al.  Normal mode determination in crystals , 1981 .