Prasad Karishma, Upreti Dinesh, Un Nabi Md Rafique, Oppong Richeal A, Wang Fei, Shinde Manish, Hu Jin, Wang Jian
Department of Chemistry and Biochemistry, Wichita State University, Wichita, Kansas 67260, United States.
Department of Physics, University of Arkansas, Fayetteville, Arkansas 72701, United States.
Inorg Chem. 2024 Oct 28;63(43):20257-20265. doi: 10.1021/acs.inorgchem.4c02713. Epub 2024 Sep 19.
Bismuth is a good constituent element for many quantum materials due to its large atomic number, 6s6p orbitals, and strong spin-orbital coupling. In this work, three new bismuthides, NdZnBi, (LaPr)ZnBi, and (LaNd)ZnBi, were grown by a metal flux method, and their crystal structures were accurately determined by single-crystal X-ray diffraction. These new bismuthides belong to the RE-T-Pn (RE = La-Lu, T = Mn, Fe, Co, Ni, or Zn, and Pn = P, As, Sb, or Bi) family, are isostructural, and crystallize in the HfCuSi structure type. The bismuth elements have two possible oxidation states, Bi and Bi, which were studied by X-ray photoelectron spectroscopy (XPS). Two binding energy peaks of 155.91 and 161.23 eV were observed for Bi atoms within NdZnBi, and similar binding energy peaks were detected in NdBi and LiBi. XPS also confirmed the trivalent nature of Nd, which was further verified by magnetic measurements. Additionally, magnetic measurements revealed that NdZnBi exhibits an antiferromagnetic transition around 3 K, while the mixed-cation compounds do not show any magnetic transition down to 2 K. Electronic transport measurements reveal weak magnetoresistance in all three compounds, with a maximum value of ∼25% at 2 K and 9 T for (LaNd)ZnBi.
铋由于其较大的原子序数、6s6p轨道以及强自旋轨道耦合，是许多量子材料的良好组成元素。在本工作中，通过金属助熔剂法生长了三种新型铋化物NdZnBi、(LaPr)ZnBi和(LaNd)ZnBi，并通过单晶X射线衍射精确确定了它们的晶体结构。这些新型铋化物属于RE-T-Pn（RE = La-Lu，T = Mn、Fe、Co、Ni或Zn，Pn = P、As、Sb或Bi）族，结构相同，结晶为HfCuSi结构类型。铋元素有两种可能的氧化态Bi和Bi，通过X射线光电子能谱（XPS）对其进行了研究。在NdZnBi中观察到Bi原子的两个结合能峰，分别为155.91和161.23 eV，在NdBi和LiBi中也检测到了类似的结合能峰。XPS还证实了Nd的三价性质，这通过磁性测量进一步得到验证。此外，磁性测量表明NdZnBi在3 K左右表现出反铁磁转变，而混合阳离子化合物在2 K以下未显示任何磁转变。电子输运测量表明，所有三种化合物都表现出弱磁电阻，(LaNd)ZnBi在2 K和9 T时的最大值约为25%。
