文章基本信息

标题：Mn-induced Ferromagnetic Semiconducting Behavior with Linear Negative Magnetoresistance in Sr4(Ru1−xMnx)3O10 Single Crystals
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作者：Lingyi Xing ; Xin Gui ; Weiwei Xie 等
期刊名称：Scientific Reports
电子版ISSN：2045-2322
出版年度：2018
卷号：8
期号：1
页码：13330
DOI：10.1038/s41598-018-31679-w
语种：English
出版社：Springer Nature
摘要：Triple-layered Sr₄Ru₃O₁₀ is a unique ferromagnet with the central RuO₆ layer behaving differently from two outer layers both crystallographically and magnetically. We report that the partial substitution of Ru by smaller Mn gives rise to modification in crystal structure, electronic and magnetic properties of Sr₄(Ru_{1− x}Mn_x)₃O₁₀. Through the single crystal X-ray diffraction refinement, we find that (Ru/Mn)O₆ octahedral rotation is no longer detectable at x ≥ 0.23, leading to the tetragonal structure. The magnetization measurements indicate the ferromagnetic transition temperature T _C decreases from 105 K for x = 0 to 30 K for x = 0.41, with the reduced magnetic moment as well. Remarkably, Mn doping results in the change of magnetic anisotropy from the easy c axis in x = 0 to the easy ab plane seen in x = 0.34 and 0.41. Such change also removes the ab -plane metamagnetic transition observed in x = 0. Furthermore, the electrical resistivity increases with increasing x showing semiconducting behavior with Δ ~ 10 meV for x = 0.34 and 30 meV for x = 0.41. Under applied magnetic field, the magnetoresistance exhibits negative and linear field dependence in all current and field configurations. These results clearly indicate Sr₄(Ru_1−xMn_x)₃O₁₀ is a novel ferromagnetic semiconductor with exotic magnetotransport properties.