论文标题
在钴取代的LATA（O，n）3-D中观察到室温高于室温的可能稀释的铁磁性
Observation of a possible diluted ferromagnetism above room temperature in cobalt-substituted LaTa(O,N)3-d
论文作者
论文摘要
自2000年以来，材料研究的强化努力以开发出稀释的磁性半导体，表现出高温（HT）超过室温的高温（HT）铁磁性。在这里，实现了基于钙钛矿型氧硝基Lata1-Xcox（O，n）3-D（X = 0.01，0.03，0.05），可能的第一个散装稀释的HT稀释的HT Forromagnetic非金属材料。合成粉末的库里温度超过600 K，样品磁化足够大，可以直接被永久磁铁吸引。可以排除钴簇作为观察到的HT - 铁磁性的可能来源，因为所有应用的表征方法都验证了相纯度。应用的常规和元素特异性磁力测定法暗示铁磁中间自旋（IS）CO3+，该自旋包含在铁磁宿主基质中。这表明现有的晶体结构，观察到的阴离子空位和引入的钴离子之间存在复杂的磁相互作用。这些结果为进一步稀释的HT磁性半导体的实验研究和设计奠定了基础。
Since 2000, the intensive effort in materials research to develop a diluted magnetic semiconductor exhibiting high-temperature (HT) ferromagnetism above room temperature was not successful. Here, the possible first bulk diluted HT-ferromagnetic non-metallic materials, based on the perovskite-type oxynitrides LaTa1-xCox(O,N)3-d (x = 0.01, 0.03, 0.05) are realized. The Curie temperature of the synthesized powders exceeds 600 K and the sample magnetizations are large enough to be directly attracted by permanent magnets. Cobalt clusters as a possible source for the observed HT-ferromagnetism can be excluded, since all applied characterization methods verify phase purity. Applied conventional and element-specific magnetometry imply ferromagnetic intermediate spin (IS) Co3+ which is included in a ferromagnetic host matrix. This indicates a complex magnetic interplay between the existing crystal structure, the observed anionic vacancies, and the introduced cobalt ions. These results lay the foundation for the experimental investigation and design of further diluted HT-ferromagnetic semiconductors.
