Observation of thermodynamics originating from a mixed-spin ferromagnetic chain

Article

关键词: MNNI(NO2)(4)(EN)(2) EN;    METAMAGNETIC BEHAVIOR;    MAGNETIC-PROPERTIES;    BIMETALLIC CHAINS;    COMPOUND;   

DOI  :  10.1103/PhysRevB.106.L100404

来源: SCIE

【 摘 要 】

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.

【 授权许可】

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