Magnetic properties of the frustrated spin-$$\frac{1}{2}$$ capped-kagome antiferromagnet (CsBr)Cu5V2O10
Journal Article
·
· Physical Review. B
- Indian Institute of Science Education and Research (India)
- Ames Lab., and Iowa State Univ., Ames, IA (United States)
Here, the structural and magnetic properties of a spin-$$\frac{1}{2}$$ averievite (CsBr)Cu5V2O10 are investigated by means of temperature-dependent x-ray diffraction, magnetization, heat capacity, and 51V nuclear magnetic resonance (NMR) measurements. The crystal structure (trigonal, $$P\bar{3}$$) features a frustrated capped-kagome lattice of the magnetic Cu2+ ions. Magnetic susceptibility analysis indicates a large Curie-Weiss temperature of $$\theta$$CW ≃ -175K. Heat capacity signals the onset of a magnetic long-range-order (LRO) at TN≃21.5K at zero magnetic field due to the presence of significant inter-planer coupling in this system. The magnetic LRO below 27 K is further evident from the drastic change in the 51V NMR signal intensity and rapid enhancement in the 51V spin-lattice relaxation rate in a magnetic field of 6.3 T. The frustration index ƒ=|$$\theta$$CW|/TN ≃ 8 ascertains strong magnetic frustration in this compound. From the high-temperature value of the 51V NMR spin-lattice relaxation rate, the leading antiferromagnetic exchange interaction between the Cu2+ ions is calculated to be J/kB ≃ 136K.
- Research Organization:
- Ames Laboratory (AMES), Ames, IA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division (MSE)
- Grant/Contract Number:
- AC02-07CH11358
- OSTI ID:
- 2481293
- Report Number(s):
- AL-J--676
- Journal Information:
- Physical Review. B, Journal Name: Physical Review. B Journal Issue: 17 Vol. 110; ISSN 2469-9950
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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