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

Cong, Mengru1; Ge, Han2; Zhang, Lei1,2,3; Ren, Weijun1; Zhao, Nan2; Li, Tiantian2; Wang, Shanmin2; Zhu, Jinlong2; Mei, Jiawei2,4,5; Zhang, Qiang6; Sheng, Jieming2,7; Gao, Fei1; Li, Bing1; Zhang, Zhidong1; Wu, Liusuo2,5,8

2023-02-28

10.1103/PhysRevMaterials.7.024423

Physical Review Materials   Impact Factor & Quartile

2475-9953

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 T-N1 = 1.75 +/- 0.02 and T-N2 = 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 parallel to 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.

SCI

English

Corresponding

National Key Research and Development Program of China[2021YFA1400400] ; National Natural Science Foundation of China["12134020","11974157","52071323","12174175","12104255"] ; Guangdong Basic and Applied Basic Research Foundation[2021B1515120015] ; Shenzhen Key Laboratory of Advanced Quantum Functional Materials and Devices[ZDSYS20190902092905285] ; Shenzhen Fundamental Research Program[JCYJ20220818100405013] ; Shenzhen Science and Technology Program[KQTD20200820113047086]

Materials Science

Materials Science, Multidisciplinary

WOS:000943169600003

AMER PHYSICAL SOC

Web of Science

1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
2.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Peoples R China
3.Chinese Acad Sci, Ganjiang Innovat Acad, Ganzhou 341000, Peoples R China
4.Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Engn, Shenzhen 518055, Peoples R China
5.Southern Univ Sci & Technol, Shenzhen Key Lab Adv Quantum Funct Mat & Devices, Shenzhen 518055, Peoples R China
6.Oak Ridge Natl Lab, Scattering Div, Oak Ridge, TN 37831 USA
7.Southern Univ Sci & Technol, Acad Adv Interdisciplinary Studies, Shenzhen 518055, Peoples R China
8.Guangdong Hong Kong Macao Greater Bay Area Guangdo, Quantum Sci Ctr, Shenzhen 518045, Peoples R China

Cong, Mengru,Ge, Han,Zhang, Lei,et al. Magnetic phase diagram and multiple field-induced states in the intermetallic triangular-lattice antiferromagnet NdAuAl4Ge2 with Ising-like spins[J]. Physical Review Materials,2023,7(2).

Cong, Mengru.,Ge, Han.,Zhang, Lei.,Ren, Weijun.,Zhao, Nan.,...&Wu, Liusuo.(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).

Cong, Mengru,et al."Magnetic phase diagram and multiple field-induced states in the intermetallic triangular-lattice antiferromagnet NdAuAl4Ge2 with Ising-like spins".Physical Review Materials 7.2(2023).