Perspective on emerging views on microscopic origin of relaxor behavior

Relaxors are complex oxide ferroelectrics that are of interest because of their attractive dielectric and electromechanical properties

A. Pramanick; S. Nayak

2021

Scholarcy highlights

  • Relaxors are complex oxide ferroelectrics that are of interest because of their attractive dielectric and electromechanical properties
  • A broad frequency-dependent dielectric permittivity peak is usually considered as a characteristic feature of relaxors
  • In spite of decades long research, a microscopic model of relaxors has not been conclusively established. This field has experienced renewed interest driven by mainly two factors: discovery of new Pb-free relaxors in response to toxicity concerns about Pb-based materials in electronics and advancements in experimental and theoretical techniques that provided new microscopic insights
  • We will provide a description of some important Pb-free relaxors with particular reference to their dielectric properties
  • We will review the classical microscopic models of relaxors and discuss how these models have evolved over the last decade
  • The opportunities in this regard provided by the emergence of new Pb-free relaxors will be highlighted

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