Perovskites: Structure–Property Relationships Richard J.D. Tilley

325 MRS BULLETIN • VOLUME 42 • APRIL 2017 • www.mrs.org/bulletin P is a mineral with formula CaTiO3 and has given its name to a family of compounds that have a general formula ABX3, where A and B are usually large cations, and medium-sized cation X is an anion. These compounds have a variety of physical and structural properties that lead to a plethora of applications. Recently, hybrid perovskites have also attracted attention due to their photovoltaic applications. Novel phenomena at artifi cial heterointerfaces have also become scientifi cally interesting. Hence, an up-to-date review of the literature in this area is needed and is the subject of this book, which is organized into nine chapters. Chapter 1 deals with the description of the ABX3 perovskite structure and the idealized composition: SrTiO3. The possible variants such as cation displacement, Jahn–Teller distortion, and octahedral tilts are clearly explained and well illustrated with examples. Symmetry relationships and hybrid inorganic perovskites are also briefl y addressed. Chapter 2 describes related structures such as double perovskites, nitrides, and A-site-defi cient and anion-defi cient phases. In each case, the modifi cations of structure with respect to the ideal perovskite are simply explained, and many structures are nicely drawn with recent examples. Chapter 3 deals with hexagonal perovskites, where the structures have hexagonal instead of cubic close packing of AX3 layers. The chapter lists several types of packing, including the BaNiO3 hexagonal ideal structure. Chapter 4 presents modular structures. The fi rst part is related to the description of various perovskite structures and gives well-known examples such as Ruddlesden–Popper or layered cuprate phases. The idealized structures are nicely drawn, and tables contain the crystallographic information. The last fi ve chapters concern the physical properties of perovskites. Chapter 5 focuses on the diff usion and ionic conductivity properties. After some mathematical defi nitions, the manipulation with defects of such properties is explained before introducing recent work on solid-oxide fuel cells. The dielectric and ferroelectric properties presented in chapter 6 are classical but are illustrated by recent results such as BiFeO3 compounds or improper ferroelectricity. Chapter 7 discusses magnetic properties. Basic concepts are introduced, and typical behaviors (spin glass, control spins) are explained using recent examples. Discussions of multiferroic perovskites end this chapter. Chapter 8 covers electronic conductivity. The chapter starts with the bandstructure approach, and then discusses several concepts associated with electrical properties, such as semiconductors, the metal–insulator transition, high-Tc cuprates, half-metallicity, charge and orbital ordering, and magnetoresistance. Chapter 9 describes unique thermal and optical properties. Recent results such as the magnetocaloric eff ect of perovskite solar cells are introduced. This book is clearly written and easy to read. Many recent references are included. The fi gures are useful and clear. It is written at an appropriate level for someone with a materials science background. I recommend this book to any research scientist or student in solid-state physics or materials science.