The most significant experimental results and theoretical concepts related to chromium dioxide-based composites, according to their influence on the evolution of modern understanding of electron transport phenomena in disordered magnetic systems, are presented. It is shown that the variety of physical processes taking place in powder materials does not allow the development of a holistic theoretical approach to describing the properties of the obtained compacted materials. The properties of composite materials depend on the anisotropy of the shape and magnetic properties of particles of which they are composed. The influence of percolation effects leads to a change in the current-carrying channels morphology with the temperature variation in an external magnetic field. This affects both the shape of the magnetoresistance hysteresis loops and the magnetic field magnitudes corresponding to the magnetoresistance maxima. A wide range of magnetotransport phenomena observed in half-metal composite materials contributes to the development of modern concepts of the conductivity features near the metal-insulator threshold and the influence of the metal-insulator interfaces on tunneling conductivity.

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CrO2powder 复合材料的磁传输特性（综述文章）

介绍了与二氧化铬基复合材料相关的最重要的实验结果和理论概念，根据它们对现代无序磁系统中电子传输现象理解的演变的影响。结果表明，粉末材料中发生的各种物理过程不允许开发一种整体的理论方法来描述所获得的压实材料的性能。复合材料的性能取决于组成它们的颗粒的形状和磁性的各向异性。渗流效应的影响导致载流通道形态随着外部磁场中的温度变化而变化。这会影响磁阻磁滞回线的形状和对应于磁阻最大值的磁场幅度。在半金属复合材料中观察到的广泛的磁传输现象有助于现代概念的发展，即金属-绝缘体阈值附近的导电特性以及金属-绝缘体界面对隧道导电性的影响。