Fabrication and magnetic properties of single-crystalline La0.33Pr0.34Ca0.33MnO3/MgO nanowires
Fabrication and magnetic properties of single-crystalline La0.33Pr0.34Ca0.33MnO3/MgO nanowires
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DOI：
10.1063/1.4819828
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发表时间：
2013-09
影响因子：
4
通讯作者：
Lin Li;Hui Li;X. Zhai;C. Zeng
中科院分区：
文献类型：
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作者：
Lin Li;Hui Li;X. Zhai;C. Zeng
采用两步法合成了直径约为几十纳米的单晶La0.33Pr0.34Ca0.33MnO3/MgO核壳纳米线。结构和形貌表征证实了La0.33Pr0.34Ca0.33MnO3壳层在MgO芯层上的外延生长。在核层和壳层之间观察到清晰的界面。磁性测量表明，在一维纳米线中存在类似于块体的电子相分离。然而，纳米线表现出显着增加的量的磁冻结相和增加的矫顽力，这归因于在一维结构中的强烈调制的磁结构。
Single crystalline La0.33Pr0.34Ca0.33MnO3/MgO core-shell nanowires with diameters about tens of nanometers are synthesized by a two-step process. Structure and morphology characterizations confirm the epitaxial growth of La0.33Pr0.34Ca0.33MnO3 shell layers on MgO core layers. Clear interfaces are observed between the core and shell layers. Magnetic measurements suggest the existence of electronic phase separation in the one dimensional nanowires similar to the bulk. However, the nanowires exhibit significantly increased amount of magnetically frozen phase and increased coercivity, which are attributed to the strongly modulated magnetic structure in the one dimensional structure.