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Random singlets in the s=5/2 coupled frustrated cubic lattice Lu3Sb3Mn2O14

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Title
Random singlets in the s=5/2 coupled frustrated cubic lattice Lu3Sb3Mn2O14
Author(s)
Lee, Chanhyeon; Suheon Lee; Kim, Heung-Sik; Kittaka, Shunichiro; Kohama, Yoshimitsu; Sakakibara, Toshiro; Lee, Ki Hoon; van Tol, J.; Gorbunov, Denis I.; Do, Seung-Hwan; Yoon, Sungwon; Berlie, Adam; Choi, Kwang-Yong
Publication Date
2023-06
Journal
PHYSICAL REVIEW B, v.107, no.21
Publisher
AMER PHYSICAL SOC
Abstract
©2023 American Physical Society. We combine thermodynamic, electron spin resonance (ESR), and muon spin-relaxation (mu SR) measurements with density functional theory (DFT) and classical Monte Carlo calculations toward understanding a disorderdriven behavior of the 3D coupled frustrated cubic lattice Lu3Sb3Mn2O14 with s = 5/2. The classical Monte Carlo calculations based on exchange interactions extracted from DFT predict that Lu3Sb3Mn2O14 undergoes a transition to magnetic ordering. In sharp contrast, our specific heat measurements evince a weak magnetic anomaly at 0.5 K while mu SR detects neither long-range magnetic order nor spin freezing down to 0.3 K. For temperatures above 2 K, our ac susceptibility, magnetization, and specific heat data obey temperature-magnetic field scalings, indicative of the formation of 3D random singlets. The development of multiple ESR lines with decreasing temperature below 80 K supports the notion of inhomogeneous magnetism. Our results extend random-singlet physics to 3D frustrated classical magnets with a large spin number s = 5/2.
URI
https://pr.ibs.re.kr/handle/8788114/13583
DOI
10.1103/PhysRevB.107.214404
ISSN
2469-9950
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > 1. Journal Papers (저널논문)
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