High-Pressure Growth and Magnetic and Electrical Properties of EuB6 Nanowires,Physica Status Solidi-Rapid Research Letters

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High-Pressure Growth and Magnetic and Electrical Properties of EuB6 Nanowires
Physica Status Solidi-Rapid Research Letters ( IF 2.5 ) Pub Date : 2021-06-30 , DOI: 10.1002/pssr.202100249
Zhen Wang ₁ , Wei Han ₂ , Qinghua Fan ₁ , Yanming Zhao _{1,

3}

Affiliation

Using an iodine-assisted autoclave technique, europium hexaboride (EuB₆) nanowires are successfully prepared. The X-ray diffraction (XRD) pattern confirms that the obtained black powders are pure-phase EuB₆ crystals. High-resolution transmission electron microscopy (HRTEM) and selected-area electron diffraction (SAED) images prove that the EuB₆ nanowires are single crystals grown along the [001] direction. From the temperature-dependent magnetic susceptibility results, EuB₆ shows strong susceptibility at low temperature under 15 K, possessing a magnetic momentum of 6.0 μ_B. An Arrott plot analysis indicates that the Curie temperature T_C of ferromagnetic ordering is about 10.1 K. Moreover, the saturated magnetic moment at 7 T and there being no clear hysteresis in the magnetic hysteresis loops suggest that EuB₆ is a relatively soft ferromagnet. The electron transport measurements of the nanowire devices reveal that EuB₆ nanowires have a lower output current and a higher resistance compared with bulk crystals, and may be useful for the future magnetic devices.

中文翻译：

EuB6 纳米线的高压生长和磁电特性

使用碘辅助高压釜技术，成功制备了六硼化铕 (EuB ₆ ) 纳米线。X 射线衍射 (XRD) 图案证实所获得的黑色粉末是纯相 EuB ₆晶体。高分辨率透射电子显微镜 (HRTEM) 和选区电子衍射 (SAED) 图像证明 EuB ₆纳米线是沿 [001] 方向生长的单晶。从温度相关的磁化率结果来看，EuB ₆在 15 K 以下的低温下表现出很强的磁化率，具有 6.0 μ _B的磁动量。阿罗特图分析表明居里温度T _C铁磁有序度约为 10.1 K。此外，7 T 处的饱和磁矩和磁滞回线中没有明显的磁滞表明 EuB ₆是一种相对较软的铁磁体。纳米线器件的电子传输测量表明，与块状晶体相比，EuB ₆纳米线具有更低的输出电流和更高的电阻，可能对未来的磁性器件有用。

更新日期：2021-06-30

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