Perovskite manganites exhibit a broad range of structural, electronic, and magnetic properties, which are widely investigated since the discovery of the colossal magnetoresistance effect in 1994. As compared to the parent perovskite manganite oxides, rare earth-doped perovskite manganite oxides with a chemical composition of LnxA1-xMnO3 (where Ln represents rare earth metal elements such as La, Pr, Nd, A is divalent alkaline earth metal elements such as Ca, Sr, Ba) exhibit much diverse electrical properties due to that the rare earth doping leads to a change of valence states of manganese which plays a core role in the transport properties. There is not only the technological importance but also the need to understand the fundamental mechanisms behind the unusual magnetic and transport properties that attract enormous attention. Nowadays, with the rapid development of electronic devices toward integration and miniaturization, the feature sizes of the microelectronic devices based on rare earth-doped perovskite manganite are down-scaled into nanoscale dimensions. At nanoscale, various finite size effects in rare earth-doped perovskite manganite oxide nanostructures will lead to more interesting novel properties of this system. In recent years, much progress has been achieved on the rare earth-doped perovskite manganite oxide nanostructures after considerable experimental and theoretical efforts. This paper gives an overview of the state of art in the studies on the fabrication, structural characterization, physical properties, and functional applications of rare earth-doped perovskite manganite oxide nanostructures. Our review first starts with the short introduction of the research histories and the remarkable discoveries in the rare earth-doped perovskite manganites. In the second part, different methods for fabricating rare earth-doped perovskite manganite oxide nanostructures are summarized. Next, structural characterization and multifunctional properties of the rare earth-doped perovskite manganite oxide nanostructures are in-depth reviewed. In the following, potential applications of rare earth-doped perovskite manganite oxide nanostructures in the fields of magnetic memory devices and magnetic sensors, spintronic devices, solid oxide fuel cells, magnetic refrigeration, biomedicine, and catalysts are highlighted. Finally, this review concludes with some perspectives and challenges for the future researches of rare earth-doped perovskite manganite oxide nanostructures.

中文翻译：

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稀土掺杂钙钛矿锰氧化物纳米结构的研究进展。

钙钛矿锰矿具有广泛的结构，电子和磁性，自1994年发现巨大的磁阻效应以来，对此进行了广泛的研究。与母体钙钛矿锰矿氧化物相比，稀土掺杂的钙钛矿锰矿氧化物具有化学成分LnxA1-xMnO3（其中Ln代表稀土金属元素，如La，Pr，Nd，A为二价碱土金属元素，如Ca，Sr，Ba）的电特性由于稀土掺杂导致锰的价态变化在传输性能中起着核心作用。不仅存在技术重要性，而且还需要了解引起极大关注的异常磁和传输特性背后的基本机制。如今，随着电子设备向集成化和小型化的快速发展，基于稀土掺杂的钙钛矿锰矿的微电子设备的特征尺寸被缩小为纳米尺寸。在纳米级，稀土掺杂钙钛矿锰氧化物纳米结构中的各种有限尺寸效应将导致该系统更有趣的新颖性质。近年来，经过大量的实验和理论努力，稀土掺杂的钙钛矿锰氧化物纳米结构已经取得了很大的进展。本文概述了稀土掺杂钙钛矿锰氧化物纳米结构的制备，结构表征，物理性能和功能应用方面的研究现状。我们的回顾首先从对研究历史的简短介绍和稀土掺杂钙钛矿锰矿中的非凡发现开始。在第二部分中，总结了制备稀土掺杂钙钛矿锰氧化物纳米结构的不同方法。接下来，深入审查了稀土掺杂钙钛矿锰氧化物纳米结构的结构表征和多功能特性。在下文中，突出了稀土掺杂的钙钛矿锰氧化物纳米结构在磁存储器件和磁传感器，自旋电子器件，固体氧化物燃料电池，磁制冷，生物医学和催化剂领域的潜在应用。最后，