**Preface to "Nanoscale Ferroic Materials—Ferroelectric, Piezoelectric, Magnetic, and Multiferroic Materials"**

Ferroic materials, including ferroelectric, dielectric, piezoelectric, magnetic, and multiferroic materials, have broad applications in current modern society. Based on their rich physics and the related properties, ferroic materials can have applications for different purposes. For example, based on the switching of domain, ferroelectric and magnetic materials can be used for information storage. Based on the piezoelectric property, piezoelectric materials can be used as sensor/actuator/energy harvesters. Based on the coupling of magnetic order and ferroelectric order, multiferroic materials can have applications as magnetic field sensors and for information storage with the advantages of high storage density and low power consumption. Recently, nanoferroic materials have found new applications based on their ferroic property (low dimension limited size effect) and high surface area, such as photocatalysis.

In this scenario, the present book offers novel research insights recently published as a part of the *Nanomaterials* Special Issue "Nanoscale Ferroic Materials—Ferroelectric, Piezoelectric, Magnetic, and Multiferroic Materials", with the aim to collect the most recent advances on nanoscale ferroic materials as well as their possible practical uses in different fields of interest.

> **Zhenxiang Cheng, Changhong Yang, and Chunchang Wang** *Editors*
