Magnetic oxides

TL;DR

This survey reviews the diverse magnetic properties of oxides of transition metals and rare earths, highlighting their physical effects, magnetic behaviors, and applications, including complex phenomena like multiferroicity and spin liquids.

Contribution

It provides a comprehensive overview of the physical mechanisms and magnetic phenomena in magnetic oxides, emphasizing recent advances and diverse applications.

Findings

Rich variety of magnetic behaviors in oxides

Presence of exotic states like spin liquids

Applications in magnetoelectric and multiferroic devices

Abstract

In this article we give a general survey of the main properties of magnetic oxides - mostly the oxides of transition metals, but sometime also containing rare earths ions. This is a very rich class of materials, among which there are insulators and metals, systems with insulator-metal transitions, and there are among them even high-temperature superconductors. One of the main features of these compounds, which attract to them special attention and which serve as a basis of many applications, are their rich magnetic properties. In this article we discuss the main physical effects determining their behaviour, and describe in detail especially their magnetic properties, but not only. After shortly discussing the basic structure of isolated magnetic ions, we concentrate on the collective effects depending on the interaction between sites, especially exchange interaction, giving rise to different magnetic properties: different types of magnetic ordering in conventional systems, but also more exotic states such as spin liquid states in frustrated systems. We also cover related phenomena in magnetic oxides, such as magnetoelectric and multiferroic behaviour, and discuss at the end their diverse useful properties serving as a basis of many applications.