钆铝硅（GdAlSi）和钐铝锗（SmAlGe）的磁性和电气传输特性

IF 1.5 4区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY

Chinese Physics B Pub Date : 2024-04-23 DOI:10.1088/1674-1056/ad41ba

Jing Gong, Huan Wang, Xiao Ma, Xiangyu Zeng, Junfa Lin, Kun Han, Yiting Wang, Tianlong Xia

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引用次数: 0

摘要

在这项研究中，我们对具有 LaPtSi- 型结构（空间群 I41 md）的 GdAlSi 和 SmAlGe 晶体的磁性和电气传输特性进行了详细的研究。磁感应强度数据明确显示了低于特征转变温度（T N ）的磁有序性。对于钆铝硅（GdAlSi），当磁场作用低于 T N（约 32 K）时，ab 平面内的磁化和磁阻曲线会出现磁滞环。此外，在 Gd3+ 的 J = 7/2 和 Sm3+ 的 J = 5/2 时，高温下提取的磁熵与 Rln(2J+1) 的理论值一致。SmAlGe 也表现出类似肖特基的比热贡献。此外，GdAlSi 和 SmAlGe 还表现出正磁阻和正常霍尔效应。

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Magnetic and electrical transport properties in GdAlSi and SmAlGe

In this work, we conduct a detailed examination of the magnetic and electrical transport properties in GdAlSi and SmAlGe crystals, which possess a LaPtSi-type structure (space group I41 md). The magnetic susceptibility data unambiguously reveal magnetic ordering below a characteristic transition temperature (T N ). For GdAlSi, a hysteresis loop is observed in the magnetization and magnetoresistance curves within the ab plane when the magnetic field is applied below T N , which is around 32 K. Notable specific heat anomalies are detected at 32 K for GdAlSi and 6 K for SmAlGe, confirming the occurrence of magnetic transitions. Besides, the extracted magnetic entropy at high temperatures is consistent with the theoretical value of Rln(2J+1) for J = 7/2 in Gd3+ and J = 5/2 in Sm3+, respectively. SmAlGe also exhibits Schottky-like specific heat contributions. Additionally, both GdAlSi and SmAlGe exhibit positive magnetoresistance and a normal Hall effect.

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来源期刊

Chinese Physics B 物理-物理：综合

CiteScore

2.80

自引率

23.50%

发文量

15667

审稿时长

2.4 months

期刊介绍： Chinese Physics B is an international journal covering the latest developments and achievements in all branches of physics worldwide (with the exception of nuclear physics and physics of elementary particles and fields, which is covered by Chinese Physics C). It publishes original research papers and rapid communications reflecting creative and innovative achievements across the field of physics, as well as review articles covering important accomplishments in the frontiers of physics. Subject coverage includes: Condensed matter physics and the physics of materials Atomic, molecular and optical physics Statistical, nonlinear and soft matter physics Plasma physics Interdisciplinary physics.