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Observation of magnetic dimers in the diluted triangular-lattice spin liquid candidate NaYbO2
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作者:

Zhang, Wenjing
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Huazhong Univ Sci & Technol, Wuhan Natl High Magnet Field Ctr & Sch Phys, Wuhan 430074, Peoples R China
Songshan Lake Mat Lab, Dongguan 523808, Peoples R China Huazhong Univ Sci & Technol, Wuhan Natl High Magnet Field Ctr & Sch Phys, Wuhan 430074, Peoples R China

Cao, Jiaojiao
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Huazhong Univ Sci & Technol, Wuhan Natl High Magnet Field Ctr & Sch Phys, Wuhan 430074, Peoples R China Huazhong Univ Sci & Technol, Wuhan Natl High Magnet Field Ctr & Sch Phys, Wuhan 430074, Peoples R China

Li, Zhengrong
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Huazhong Univ Sci & Technol, Wuhan Natl High Magnet Field Ctr & Sch Phys, Wuhan 430074, Peoples R China Huazhong Univ Sci & Technol, Wuhan Natl High Magnet Field Ctr & Sch Phys, Wuhan 430074, Peoples R China

Wang, Lei
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Huazhong Univ Sci & Technol, Wuhan Natl High Magnet Field Ctr & Sch Phys, Wuhan 430074, Peoples R China Huazhong Univ Sci & Technol, Wuhan Natl High Magnet Field Ctr & Sch Phys, Wuhan 430074, Peoples R China

Chen, Yingjian
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Huazhong Univ Sci & Technol, Wuhan Natl High Magnet Field Ctr & Sch Phys, Wuhan 430074, Peoples R China Huazhong Univ Sci & Technol, Wuhan Natl High Magnet Field Ctr & Sch Phys, Wuhan 430074, Peoples R China

Guo, Hanjie
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Songshan Lake Mat Lab, Dongguan 523808, Peoples R China Huazhong Univ Sci & Technol, Wuhan Natl High Magnet Field Ctr & Sch Phys, Wuhan 430074, Peoples R China

Zhao, Jinkui
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Songshan Lake Mat Lab, Dongguan 523808, Peoples R China Huazhong Univ Sci & Technol, Wuhan Natl High Magnet Field Ctr & Sch Phys, Wuhan 430074, Peoples R China

Fu, Zhendong
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Songshan Lake Mat Lab, Dongguan 523808, Peoples R China Huazhong Univ Sci & Technol, Wuhan Natl High Magnet Field Ctr & Sch Phys, Wuhan 430074, Peoples R China

论文数: 引用数:
h-index:
机构:
机构:
[1] Huazhong Univ Sci & Technol, Wuhan Natl High Magnet Field Ctr & Sch Phys, Wuhan 430074, Peoples R China
[2] Songshan Lake Mat Lab, Dongguan 523808, Peoples R China
基金:
中国国家自然科学基金;
关键词:
The triangular-lattice spin liquid candidate;
Magnetically diluted;
High-field electron spin resonance;
Magnetic dimers;
CLUSTERS;
STATE;
D O I:
10.1016/j.jallcom.2024.176367
中图分类号:
O64 [物理化学(理论化学)、化学物理学];
学科分类号:
070304 ;
081704 ;
摘要:
The triangular-lattice spin liquid (QSL) candidate NaYbO2 is magnetically diluted by Lu doping, forming homogeneous solid solutions NaYb1-xLuxO2 (0 <= x<1.0). A combination of structural, magnetic, and pulsed high-field electron spin resonance analysis shows that the lattice parameters and the Curie-Weiss temperature theta(CW) vary almost linearly with x, and the crystal electric field environment of the Yb/Lu ions persists during the Lu doping. The statistical distribution analysis of clusters and the deduced linear theta(CW) similar to x relation indicate that the nearest neighbor exchange J does not change with magnetic dilution. Interestingly, with the magnetization measurement at 0.39 K, we have observed S-eff = 1/2 antiferromagnetic Yb-Yb dimers in NaYb0.02Lu0.98O2, which is manifested as a magnetization step at mu H-0(c) = 2.68 T due to the transition between singlet and triplet states. Thus, the intradimer interaction is directly determined as J/k(B) = -5.15 K. Surprisingly, this value is close to the interaction of undoped NaYbO2, supporting the theoretical analysis of clusters. Our study provides a method of estimating the magnetic interaction of QSL materials through magnetic dilution. The statistical distribution analysis of magnetic clusters suggests that through a small amount of Lu doping (x < 0.5), the QSL state in NaYbO2 can continue to be maintained.
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