Experiment and Theory of Pb(In1/2Nb1/2)O3: Antiferroelectric, Ferroelectric, or Relaxor State Depending on Perovskite B-Site Randomness
スポンサーリンク
概要
- 論文の詳細を見る
We review the recent progress in our understanding of the effect of B-site randomness on Pb(In1/2Nb1/2)O3 (PIN) from the experimental and theoretical viewpoints. PIN is one of the ideal systems for investigating the effect of perovskite B-site randomness on relaxor formation, because it can be in the antiferroelectric (AFE), ferroelectric (FE), or relaxor state depending on B-site randomness. Lattice dynamics measured in ordered and disordered PINs indicates the existence of FE instability regardless of the B-site randomness of PIN. AFE is stabilized when the B-site is spatially ordered, overwhelming FE instability. The hidden FE state starts to appear as B-site randomness becomes stronger and suppresses AFE instability. Ultimately, the randomness competes with the development of FE regions and blocks long-range FE ordering, which yields polar nanoregions (PNRs) resulting in relaxor behavior. In order to investigate the interesting behavior of PIN, we constructed a minimal model that includes dipolar interaction and easy-axis anisotropy which depends on B-site randomness. The results from Monte Carlo simulations show that the model well reproduces the phase diagram and dielectric constant of PIN qualitatively.
- Physical Society of Japanの論文
- 2010-01-15
著者
-
Ohwada Kenji
Synchrotron Radiation Research Center (spring-8) Quantum Beam Science Directorate Japan Atomic Energ
-
Tomita Yusuke
Institute For Solid State Physics University Of Tokyo
-
Ohwada Kenji
Synchrotron Radiation Research Center (SPring-8), Quantum Beam Science Directorate, Japan Atomic Energy Agency, Sayo, Hyogo 679-5148, Japan
-
Tomita Yusuke
Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwa-no-ha, Kashiwa, Chiba 277-8581, Japan
関連論文
- Resonant Magnetic X-ray Diffraction Study on Successive Metamagnetic Transitions in TbB_4(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
- High-Magnetic-Field X-ray Absorption Spectroscopy of Field-Induced Valence Transition in EuNi_2(Si_Ge_x)_2(Condensed matter : electronic structure and electrical, magnetic, and optical properties)
- Spatial Distribution of the B-site Inhomogeneity in an as-grown Pb(In_Nb_)O_3 Single Crystal Studied by a Complementary Use of X-ray and Neutron Scatterings(Condensed Matter : Structure, Mechanical and Thermal Properties)
- Experiment and Theory of Pb(In_Nb_)O_3 : Antiferroelectric, Ferroelectric, or Relaxor State Depending on Perovskite B-Site Randomness
- Magnetic Properties of Two-Dimensional Dipolar Squares : Boundary Geometry Dependence(Condensed matter: electronic structure and electrical, magnetic, and optical properties)
- Peculiar 'from-Edge-to-Interior' Spin Freezing in a Magnetic Dipolar Cube(General)
- Monte Carlo Study of One-Dimensional Ising Models with Long-Range Interactions(General)
- Critical and Glassy Phases in Non-Disordered Antiferromagnetic Heisenberg Model on Triangular Lattice
- Experiment and Theory of Pb(In1/2Nb1/2)O3: Antiferroelectric, Ferroelectric, or Relaxor State Depending on Perovskite B-Site Randomness
- Monte Carlo Study of Relaxor Systems: A Minimum Model of Pb(In1/2Nb1/2)O3