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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Multi-functional properties of non-centrosymmetric ternary half-Heuslers, RPdSb (R = Er and Ho)
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Multi-functional properties of non-centrosymmetric ternary half-Heuslers, RPdSb (R = Er and Ho)

机译：非Centroosymmetric三元半血清空间的多功能属性，RPDSB（R = ER和HO）

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摘要

We report here the observed unusual magnetoresistance, magnetocaloric effect and thermoelectric properties of half-Heuslers, ErPdSb, and HoPdSb, crystallizing in a non-centrosymmetric cubic structure. While ErPdSb exhibits a paramagnetic behaviour in the entire temperature range of our study (1.8-300 K), HoPdSb was found to order antiferromagnetically below 2.2K. The magnetic entropy change was estimated to be similar to 48 and similar to 22 J (kg K)(-1) at 2.5 K for Ho and Er sample, respectively, for a field change of 90 kOe, which is comparable or higher than the well-known magnetocaloric materials in this temperature range. The magnetoresistance (MR) behaviour was found to be a combination of positive and negative MR contributions analogous to that of the Weyl semimetals having non-trivial band structure (NbAs and TaAs) which can be modelled in terms of Adler-Bell-Jackiw anomaly. In addition, we observed low thermal conductivities for both these samples. Our studies clearly indicate that these half-Heuslers, HoPdSb and ErPdSb, exhibiting different properties can serve as multifunctional materials in various applications, specifically for ultra-low temperature applications.
机译：我们在此报告半血清杂机，ERPDSB和HOPDSB的观察到的异常磁阻，磁热效应和热电性能，在非亚离子微立方结构中结晶。虽然ERPDSB在我们研究的整个温度范围内展示了顺磁性行为（1.8-300 k），但查找HopdsB下跌低于2.2K的反铁磁体。估计磁熵变化分别与48k和ER样品的磁共熵变化相似，类似于22J（kg k）（ - 1），用于90只koe的田间变化，其可比较或高于众所周知的磁热物料在该温度范围内。发现磁阻（MR）行为是类似于具有非平凡结构（NBAS和TAA）的威基半型的正面和负面MR贡献的组合，其可以根据Adler-Bell-JackiW异常进行建模。此外，我们观察了这两个样品的低导热性。我们的研究清楚地表明，这些半发生的人，跳跃和ERPDSB，表现出不同的性质可以用作各种应用中的多功能材料，专门用于超低温度应用。

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