Abstract Highly ordered TbxFe7Co3 (x=0, 0.6, 0.8) nanowires were synthesized in alumina templates by electrochemical deposition method. Here, the effects of Tb-content and annealing treatment on the phase composition, morphology, crystalline structure and magnetic properties were investigated. The as-deposited Tb0Fe7Co3 nanowires comprise Fe7Co3 phase. While after adding Tb, the diffraction peaks slightly shift left, indicating the infiltration of Tb atoms into Fe7Co3 phase. After annealing, Tb0Fe7Co3 nanowires still consists of Fe7Co3 phase with a slight enhancement on coercivity. While the annealed nanowires with Tb doped present a complex phase composition containing Fe3Tb, Fe2Tb, Co3Tb, Co17Tb2, TbFeO3 and Fe2O3 phases distributed in the central portion, and Co0.72Fe0.28 at the nanowire outer walls. The annealed TbxFe7Co3 (x=0.6, 0.8) nanowires shows higher magnetic performance owing to the formation of hard magnetic phases, the interfacial elastic coupling between hard and soft phases and the coherent Fe3Tb/Co3Tb interface which restrain the domain wall motion. To be specific, the coercivity and remanence ratio of TbxFe7Co3 (x=0.6, 0.8) nanowires significantly enhance with increasing Tb-content.

中文翻译：

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Tb Fe7Co3 (x=0, 0.6, 0.8)纳米线的电化学合成、结构表征和磁性能

摘要 采用电化学沉积法在氧化铝模板中合成了高度有序的TbxFe7Co3 (x=0, 0.6, 0.8)纳米线。在这里，研究了 Tb 含量和退火处理对相组成、形貌、晶体结构和磁性能的影响。沉积态的 Tb0Fe7Co3 纳米线包含 Fe7Co3 相。而加入 Tb 后，衍射峰略微左移，表明 Tb 原子渗入 Fe7Co3 相。退火后，Tb0Fe7Co3 纳米线仍由 Fe7Co3 相组成，矫顽力略有增强。而掺杂了 Tb 的退火纳米线呈现复杂的相组成，其中包含分布在中心部分的 Fe3Tb、Fe2Tb、Co3Tb、Co17Tb2、TbFeO3 和 Fe2O3 相，以及分布在纳米线外壁的 Co0.72Fe0.28。退火后的 TbxFe7Co3 (x=0.6, 0. 8) 由于硬磁相的形成、硬相和软相之间的界面弹性耦合以及抑制畴壁运动的相干 Fe3Tb/Co3Tb 界面，纳米线显示出​​更高的磁性能。具体而言，TbxFe7Co3 (x=0.6, 0.8)纳米线的矫顽力和剩磁比随着Tb含量的增加而显着提高。