Cobalt is a strategically important metal for modern energy, aerospace, and chemical technologies. New developments in cobalt materials processing and characterization, along with studies of its properties, are very helpful for device applications. This book presents an overview of cobalt materials, their synthesis, properties, and various uses across different fields. This book covers the fundamental aspects of cobalt, including its properties, processing, and technological development. The reported topics and related materials are the building blocks of all technological innovation. This book serves as an essential reference for students, researchers, and professionals who want a clear understanding of cobalt and its significance in science and technology.