Field-induced incommensurate phase in the strong-rung spin ladder with ferromagnetic legs
arXiv:1406.2231 · doi:10.1103/PhysRevB.89.220402
Abstract
We report magnetization, specific heat, and NMR measurements of 3-Br-4-F-V [=3-(3-bromo-4-fluorophenyl)-1,5-diphenylverdazyl], a strong-rung S=1/2 Heisenberg spin ladder with ferromagnetic leg interactions. We explain the magnetic and thermodynamic properties based on the strong-rung regime. Furthermore, we find a field-induced successive phase transition in the specific heat and the nuclear spin-lattice relaxation rate 1/T1. 19F-NMR spectra for higher- and lower-temperature phases indicate partial magnetic order and incommensurate long-range order, respectively, evidencing the presence of frustration due to weak interladder couplings.
12 pages, 3 figures
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- Magnetic properties of a spin-1/2 octagonal lattice
- Quantum spin state stabilized by coupling with classical spins
- Gapless behavior in a two-leg spin ladder with bond randomness
- Quantum phase with spontaneous translational symmetry breaking in an extended diamond chain
- Realization of a Spin-1/2 Hexagonal-Plaquette Chain with Ising-Like Anisotropy