论文标题
磁氧化物
Magnetic oxides
论文作者
论文摘要
在本文中，我们对磁氧化物的主要特性进行了一般调查 - 主要是过渡金属的氧化物，但有时还包含稀土离子。这是一类非常丰富的材料，其中有绝缘子和金属，具有绝缘体金属过渡的系统，其中甚至具有高温超导体。这些化合物的主要特征之一，吸引它们的特别注意并作为许多应用的基础，是它们丰富的磁性特性。在本文中，我们讨论了确定其行为的主要物理效应，并详细描述了其磁性，而不仅仅是其磁性。在不久讨论了孤立的磁离子的基本结构之后，我们将集中在集体效应上，具体取决于站点之间的相互作用，尤其是交换相互作用，引起不同的磁性特性：常规系统中的不同类型的磁有序，以及更外来的状态，例如沮丧的系统中的旋转液态。我们还涵盖了磁氧化物中的相关现象，例如磁电和多种铁行为，最后讨论它们作为许多应用的基础的多样化有用的特性。
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.
