Spin dynamics in the staircase kagome lattice compound PbCu3TeO7
- Authors
- Yoon, S.; Lee, C.H.; Lee, S.; Choi, Y.S.; Do, S.-H.; Abdel-Jawad, M.; Watanabe, I.; Suh, B.J.; Choi, K.-Y.
- Issue Date
- Dec-2018
- Publisher
- American Physical Society
- Citation
- Physical Review B, v.98, no.21
- Journal Title
- Physical Review B
- Volume
- 98
- Number
- 21
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/3463
- DOI
- 10.1103/PhysRevB.98.214401
- ISSN
- 2469-9950
- Abstract
- Spin dynamics of the staircase kagome lattice PbCu3TeO7 was investigated by static magnetic susceptibility χ(T), high-field magnetization M(H), and muon spin rotation/relaxation (μSR) measurements. χ(T) displays a sub-Curie power-law behavior χ(T)∼T-α with changing exponent from α=0.5 to 0.3 crossing T∗=150 K. We identify a spin-flop transition at μ0H=8.5 T and another field-induced anomaly at μ0H∗=30 T in M(H). Our μSR results unveil that the magnetically inequivalent Cu(1) and Cu(2) spins develop site-specific magnetic structures through the successive magnetic transitions at TN1=36 K, TN2=25 K, and TN3=17 K. The magnetic anomalies of PbCu3TeO7 suggest that the Cu(1) and Cu(2) subsystems feature a largely distinct magnetism due to the presence of a dozen competing exchange interactions having largely different energy scales and thus the magnetism of PbCu3TeO7 is far more complex than the staircase kagome lattice. © 2018 American Physical Society.
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