Bulk Physical Properties of a Magnetic Weyl Semimetal Candidate NdAlGe Grown by a Laser Floating-Zone Method
Bulk Physical Properties of a Magnetic Weyl Semimetal Candidate NdAlGe Grown by a Laser Floating-Zone Method
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DOI：
10.3390/inorganics11010020
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发表时间：
2023-01
期刊：
影响因子：
2.9
通讯作者：
N. Kikugawa;T. Terashima;T. Kato;Momoko Hayashi;H. Yamaguchi;S. Uji
中科院分区：
文献类型：
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作者：
N. Kikugawa;T. Terashima;T. Kato;Momoko Hayashi;H. Yamaguchi;S. Uji
在这项研究中，我们报告的磁性Weyl半金属候选人NdAlGe与空间群I41 md的单晶体的成功生长。晶体是使用浮区技术生长的，该技术使用五个激光二极管，总功率为2千瓦，作为热源。为了确保在生长过程中稳定地形成熔融区，我们采用了垂直辐照强度的钟形分布轮廓。在从电弧熔化的锭中压碎的标称粉末在静水压力下成形之后，我们在Ar气氛中在超低氧分压（<10 - 26 atm）下烧结进料和种子棒，所述超低氧分压由在873 K下加热的氧化钇稳定的氧化锆制成的氧泵产生。成功地生长了NdAlGe单晶，长50 mm，在13.5K下显示出磁有序性。的基本物理性质，其特征在于通过磁化率，磁化强度，比热，热膨胀，和电阻率测量。研究表明，磁序诱导各向异性磁弹性，磁熵，和电荷输运在NdAlGe。
In this study, we report the successful growth of single crystals of a magnetic Weyl semimetal candidate NdAlGe with the space group I41md. The crystals were grown using a floating-zone technique, which used five laser diodes, with a total power of 2 kW, as the heat source. To ensure that the molten zone was stably formed during the growth, we employed a bell-shaped distribution profile of the vertical irradiation intensity. After the nominal powder, crushed from an arc-melted ingot, was shaped under hydrostatic pressure, we sintered the feed and seed rods in an Ar atmosphere under ultra-low oxygen partial pressure (<10−26 atm) generated by an oxygen pump made of yttria-stabilized zirconia heated at 873 K. Single crystals of NdAlGe were successfully grown to a length of 50 mm. The grown crystals showed magnetic order in bulk at 13.5 K. The fundamental physical properties were characterized by magnetic susceptibility, magnetization, specific heat, thermal expansion, and electrical resistivity measurements. This study demonstrates that the magnetic order induces anisotropic magnetoelasticity, magneto-entropy, and charge transport in NdAlGe.