Magnetic phase diagram and multiple field-induced states in the intermetallic triangular-lattice antiferromagnet NdAuAl4Ge2 with Ising-like spins

Mengru Cong; Han Ge; Lei Zhang; Weijun Ren; Nan Zhao; Tiantian Li; Shanmin Wang; Jinlong Zhu; Jiawei Mei; Qiang Zhang; Jieming Sheng; Fei Gao; Bing Li; Zhidong Zhang; Liusuo Wu

doi:10.1103/PhysRevMaterials.7.024423

Magnetic phase diagram and multiple field-induced states in the intermetallic triangular-lattice antiferromagnet NdAuAl4Ge2 with Ising-like spins

Mengru Cong
, Han Ge
, Lei Zhang
, Weijun Ren
, Nan Zhao
, Tiantian Li
, Shanmin Wang
, Jinlong Zhu
, Jiawei Mei
, Qiang Zhang
, Jieming Sheng
, Fei Gao
, Bing Li
, Zhidong Zhang
, Liusuo Wu

Powder Diffraction

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

Geometrical frustration and the enhancement of strong quantum fluctuations in two-dimensional triangular antiferromagnets can lead to various intriguing phenomena. Here, we studied the spin-1/2 triangular lattice antiferromagnet NdAuAl4Ge2. Thermodynamic and transport properties, such as magnetization and specific heat together with the resistivity measurements were performed. In zero field, two successive phase transitions were observed at TN1=1.75±0.02 and TN2=0.49±0.02 K, respectively. Under magnetic field, XXZ-type anisotropy was revealed with the moments pointing along the easy c axis. For B∥c, multiple field-induced states were observed, and the magnetic phase diagram was established based on the specific-heat and magnetization data. The temperature-dependent resistivity measurements indicate that NdAuAl4Ge2 is a good metal. It is very likely that both the long-range Ruderman-Kittel-Kasuya-Yosida interactions and the geometrical frustration play important roles in this case.

Original language	English
Article number	024423
Journal	Physical Review Materials
Volume	7
Issue number	2
DOIs	https://doi.org/10.1103/PhysRevMaterials.7.024423
State	Published - Feb 2023

Funding

We thank Zhentao Wang for useful discussions. The research was supported by the National Key Research and Development Program of China (Grant No. 2021YFA1400400), the National Natural Science Foundation of China (Grants No. 12134020, No. 11974157, No. 52071323, No. 12174175, and No. 12104255), the Guangdong Basic and Applied Basic Research Foundation (Grant No. 2021B1515120015), Shenzhen Key Laboratory of Advanced Quantum Functional Materials and Devices (Grant No. ZDSYS20190902092905285), Shenzhen Fundamental Research Program (Grant No. JCYJ20220818100405013), and the Shenzhen Science and Technology Program (Grant No. KQTD20200820113047086). The Major Science and Technology Infrastructure Project of Material Genome Big-science Facilities Platform supported by Municipal Development and Reform Commission of Shenzhen. Q.Z. was supported by the Scientific User Facilities Division, Basic Energy Sciences, U.S. DOE.

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10.1103/PhysRevMaterials.7.024423

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Cong, M., Ge, H., Zhang, L., Ren, W., Zhao, N., Li, T., Wang, S., Zhu, J., Mei, J., Zhang, Q., Sheng, J., Gao, F., Li, B., Zhang, Z., & Wu, L. (2023). Magnetic phase diagram and multiple field-induced states in the intermetallic triangular-lattice antiferromagnet NdAuAl4Ge2 with Ising-like spins. Physical Review Materials, 7(2), Article 024423. https://doi.org/10.1103/PhysRevMaterials.7.024423

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title = "Magnetic phase diagram and multiple field-induced states in the intermetallic triangular-lattice antiferromagnet NdAuAl4Ge2 with Ising-like spins",

abstract = "Geometrical frustration and the enhancement of strong quantum fluctuations in two-dimensional triangular antiferromagnets can lead to various intriguing phenomena. Here, we studied the spin-1/2 triangular lattice antiferromagnet NdAuAl4Ge2. Thermodynamic and transport properties, such as magnetization and specific heat together with the resistivity measurements were performed. In zero field, two successive phase transitions were observed at TN1=1.75±0.02 and TN2=0.49±0.02 K, respectively. Under magnetic field, XXZ-type anisotropy was revealed with the moments pointing along the easy c axis. For B∥c, multiple field-induced states were observed, and the magnetic phase diagram was established based on the specific-heat and magnetization data. The temperature-dependent resistivity measurements indicate that NdAuAl4Ge2 is a good metal. It is very likely that both the long-range Ruderman-Kittel-Kasuya-Yosida interactions and the geometrical frustration play important roles in this case.",

author = "Mengru Cong and Han Ge and Lei Zhang and Weijun Ren and Nan Zhao and Tiantian Li and Shanmin Wang and Jinlong Zhu and Jiawei Mei and Qiang Zhang and Jieming Sheng and Fei Gao and Bing Li and Zhidong Zhang and Liusuo Wu",

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Cong, M, Ge, H, Zhang, L, Ren, W, Zhao, N, Li, T, Wang, S, Zhu, J, Mei, J, Zhang, Q, Sheng, J, Gao, F, Li, B, Zhang, Z & Wu, L 2023, 'Magnetic phase diagram and multiple field-induced states in the intermetallic triangular-lattice antiferromagnet NdAuAl4Ge2 with Ising-like spins', Physical Review Materials, vol. 7, no. 2, 024423. https://doi.org/10.1103/PhysRevMaterials.7.024423

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T1 - Magnetic phase diagram and multiple field-induced states in the intermetallic triangular-lattice antiferromagnet NdAuAl4Ge2 with Ising-like spins

AU - Cong, Mengru

AU - Ge, Han

AU - Zhang, Lei

AU - Ren, Weijun

AU - Zhao, Nan

AU - Li, Tiantian

AU - Wang, Shanmin

AU - Zhu, Jinlong

AU - Mei, Jiawei

AU - Zhang, Qiang

AU - Sheng, Jieming

AU - Gao, Fei

AU - Li, Bing

AU - Zhang, Zhidong

AU - Wu, Liusuo

PY - 2023/2

Y1 - 2023/2

N2 - Geometrical frustration and the enhancement of strong quantum fluctuations in two-dimensional triangular antiferromagnets can lead to various intriguing phenomena. Here, we studied the spin-1/2 triangular lattice antiferromagnet NdAuAl4Ge2. Thermodynamic and transport properties, such as magnetization and specific heat together with the resistivity measurements were performed. In zero field, two successive phase transitions were observed at TN1=1.75±0.02 and TN2=0.49±0.02 K, respectively. Under magnetic field, XXZ-type anisotropy was revealed with the moments pointing along the easy c axis. For B∥c, multiple field-induced states were observed, and the magnetic phase diagram was established based on the specific-heat and magnetization data. The temperature-dependent resistivity measurements indicate that NdAuAl4Ge2 is a good metal. It is very likely that both the long-range Ruderman-Kittel-Kasuya-Yosida interactions and the geometrical frustration play important roles in this case.

AB - Geometrical frustration and the enhancement of strong quantum fluctuations in two-dimensional triangular antiferromagnets can lead to various intriguing phenomena. Here, we studied the spin-1/2 triangular lattice antiferromagnet NdAuAl4Ge2. Thermodynamic and transport properties, such as magnetization and specific heat together with the resistivity measurements were performed. In zero field, two successive phase transitions were observed at TN1=1.75±0.02 and TN2=0.49±0.02 K, respectively. Under magnetic field, XXZ-type anisotropy was revealed with the moments pointing along the easy c axis. For B∥c, multiple field-induced states were observed, and the magnetic phase diagram was established based on the specific-heat and magnetization data. The temperature-dependent resistivity measurements indicate that NdAuAl4Ge2 is a good metal. It is very likely that both the long-range Ruderman-Kittel-Kasuya-Yosida interactions and the geometrical frustration play important roles in this case.

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Magnetic phase diagram and multiple field-induced states in the intermetallic triangular-lattice antiferromagnet NdAuAl4Ge2 with Ising-like spins

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