Observation of thermodynamics originating from a mixed-spin ferromagnetic chain

Abstract

We present a model compound that forms a mixed-spin ferromagnetic chain. Our material design, based on the organic radicals, affords a verdazyl-based complex (p-Py-V)2[Mn(hfac)2]. The molecular orbital calculations of the compound indicate the formation of a mixed spin-(1/2, 1/2, 5/2) ferromagnetic chain. The temperature dependence of magnetic susceptibility reveals its ferromagnetic behavior. The magnetic specific heat exhibits a double-peak structure and indicates a phase transition at the low-temperature peak. The observed characteristics are explained using the quantum Monte Carlo calculations. Furthermore, the modified spin-wave theory verifies that the double-peak structure of the specific heat significantly reflects the relative ration of the acoustic excitation band and the optical excitation gap.

References in corpus (5)

• The ALPS project release 1.3: open source software for strongly correlated systems
• Thermodynamic properties of ferromagnetic mixed-spin chain systems
• $S$ = 1/2 ferromagnetic-antiferromagnetic alternating Heisenberg chain in a zinc-verdazyl complex
• Magnetic properties of quasi-two-dimensional $S$ = 1/2 Heisenberg antiferromagnet with distorted square lattice
• $S$ =1/2 ferromagnetic Heisenberg chain in a verdazyl-based complex

Cited by in corpus (9)

• Magnetic properties of a spin-1/2 octagonal lattice
• Numerical interchain mean-field theory for the specific heat of the bimetallic ferromagnetically coupled chain compound MnNi(NO${}_2$)${}_4$(en)${}_2$ (en = ethylenediamine)
• Quantum gapped state in a spin-1/2 distorted honeycomb-based lattice with frustration
• Field-induced quantum phase in a frustrated zigzag-square lattice
• Realization of a triangular spin necklace in a verdazyl-based Ni complex
• Emergence of Kondo-assisted Néel order in a Kondo necklace model
• Quantum phase with spontaneous translational symmetry breaking in an extended diamond chain
• Gapless behavior in a two-leg spin ladder with bond randomness
• Realization of a Spin-1/2 Hexagonal-Plaquette Chain with Ising-Like Anisotropy