Nonmagnetic Impurity Effects in the Decorated Shastry-Sutherland Compound Cd(Cu1-xZnx)(2)(BO3)(2)(0 <= x <= 0.2)
- Authors
- Do, S. H.; Hwang, J. W.; Choi, K. -Y.; Zhou, H.; Nojiri, H.
- Issue Date
- Sep-2013
- Publisher
- KOREAN PHYSICAL SOC
- Keywords
- Shastry-Sutherland lattice; Non-magnetic impurities; Electron spin resonance
- Citation
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY, v.63, no.5, pp 1028 - 1033
- Pages
- 6
- Journal Title
- JOURNAL OF THE KOREAN PHYSICAL SOCIETY
- Volume
- 63
- Number
- 5
- Start Page
- 1028
- End Page
- 1033
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/14341
- DOI
- 10.3938/jkps.63.1028
- ISSN
- 0374-4884
- Abstract
- We investigate the nonmagnetic impurity effects on the structural and the magnetic properties of the decorated Shastry-Sutherland compound Cd(Cu1-x Zn (x) )(2)(BO3)(2) (0 a parts per thousand currency sign x a parts per thousand currency sign 0.2) by using X-ray diffraction, magnetic susceptibility, high-field magnetization, and electron spin resonance measurements. With increasing Zn content x, the lattice parameters and the g-factors are systematically reduced without any accompanying structural anomaly. We find that Zn substitution leads to an almost linear decrease in the N,el temperature, as well as in the spin-flop transition and the half-step magnetization field. However, the Curie-Weiss temperature hardly varies with x. Our study suggests that intra-tetramer couplings are not essential in determining the magnetic properties of the Zn-substituted samples, unlike other frustrated quantum magnets. Rather, unfrustrated, inter-tetramer coupling is responsible for the x dependence of the magnetic behaviors.
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