TY - JOUR
KW - Cooling
KW - Perovskite
KW - Nanostructured materials
KW - Integration
KW - Polarization
KW - Ferroelectric materials
KW - Boundary conditions
KW - Dielectric properties
KW - Thermodynamics
KW - Thermal effects
KW - Barium compounds
KW - Ultrathin films
KW - Vectors
KW - Dielectric stiffness
KW - Nanometers
KW - Stress fields
KW - Threading dislocation density
KW - Stiffness
AU - S.P Alpay
AU - I.B Misirlioglu
AU - V Nagarajan
AU - Ramamoorthy Ramesh
AB - The role of dislocations in ferroelectric materials was investigated by a thermodynamic analysis. A drastic variation in the polarization near the dislocation is observed due to the coupling of the stress field of the dislocation and polarization. These polarization gradients result in string depolarizing fields that suppress the polarization in a region that extends over several nanometers. The deterimental effect of such regions increases in ultrathin ferroelectric thin films and play a crucial extrinsic role in size effect studies of ferroelectrics.
BT - Applied Physics Letters
DO - 10.1063/1.1788894
LA - eng
M1 - 11
N1 - cited By 137
N2 - The role of dislocations in ferroelectric materials was investigated by a thermodynamic analysis. A drastic variation in the polarization near the dislocation is observed due to the coupling of the stress field of the dislocation and polarization. These polarization gradients result in string depolarizing fields that suppress the polarization in a region that extends over several nanometers. The deterimental effect of such regions increases in ultrathin ferroelectric thin films and play a crucial extrinsic role in size effect studies of ferroelectrics.
PY - 2004
SP - 2044
EP - 2046
T2 - Applied Physics Letters
TI - Can interface dislocations degrade ferroelectric properties?
VL - 85
SN - 00036951
ER -