CeGaGe和PrGaGe单晶的磁性、热力学及磁输运性质
Magnetic, thermodynamic, and magnetotransport properties of CeGaGe and PrGaGe single crystals
AI总结：
本研究通过多种物性测量探究CeGaGe和PrGaGe单晶的磁相变、磁各向异性及晶体电场效应，明确了其磁结构复杂性与能级分裂特征。
摘要：
我们通过磁化、热容和磁输运测量，研究了高质量单晶CeGaGe和PrGaGe的物理性质。采用镓铟二元助熔剂生长了这些具有体心四方结构的单晶。磁化率数据显示，CeGaGe和PrGaGe分别在约6.0 K和19.4 K处发生磁相变，这一结果进一步得到热容和电阻率数据的证实。在有序温度以下的磁化率数据中还观测到多个额外的异常现象，表明其磁结构复杂。磁性测量同时揭示两种化合物均存在强磁晶各向异性。我们结合磁化率与热容数据对晶体电场（CEF）效应开展的详细分析表明，CeGaGe的$J$=5/2多重态分裂为3个二重态，而PrGaGe的$J$=4简并基态分裂为5个单重态和2个二重态。通过CEF分析估算的能级与磁熵结果一致。
英文摘要：
We investigate the physical properties of high-quality single crystals CeGaGe and PrGaGe using magnetization, heat capacity, and magnetotransport measurements. Gallium-indium binary flux was used to grow these single crystals that crystallize in a body-centered tetragonal structure. Magnetic susceptibility data reveal a magnetic phase transition around 6.0 and 19.4 K in CeGaGe and PrGaGe, respectively, which is further confirmed by heat capacity and electrical resistivity data. A number of additional anomalies have been observed below the ordering temperature in the magnetic susceptibility data, indicating a complex magnetic structure. The magnetic measurements also reveal a strong magnetocrystalline anisotropy in both compounds. Our detailed analysis of the crystalline electric field (CEF) effect as observed in magnetic susceptibility and heat capacity data suggests that the $J$ = 5/2 multiplet of CeGaGe splits into three doublets, while the $J$ = 4 degenerate ground state of PrGaGe splits into five singlets and two doublets. The estimated energy levels from the CEF analysis are consistent with the magnetic entropy.
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