Thermodynamics of the (1,1/2) ferrimagnet in finite magnetic fields

Article

关键词: MATRIX RENORMALIZATION-GROUP;    LOW-TEMPERATURE PROPERTIES;    CHAIN;    ANTIFERROMAGNET;    SYSTEMS;    STATES;   

DOI  :  10.1103/PhysRevB.58.R5908

来源: SCIE

【 摘 要 】

We investigate the specific heat and magnetization of a ferrimagnet with gS=1 and S=1/2 spins in a finite magnetic field using the transfer matrix density matrix renormalization group down to T=0.025J. Ferromagnetic gapless and antiferromagnetic gapped excitations for H=0 lead to rich thermodynamics for H greater than or equal to 0. While the specific heat is characterized by a generic double peak structure, magnetization reveals two critical fields, H-cl = 1.76(1)J and H-c2=3.00(1)J with square-root behavior in the T=0 magnetization. Simple analytical arguments allow us to understand these experimentally accessible findings.

【 授权许可】

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