Combination of ferromagnetic and antiferromagnetic features in Heisenberg ferrimagnets

1998/06/28 by Shoji Yamamoto, Takahiro Fukui, Klaus Maisinger +1 · 1 citation
Physics and Astronomy · #Antiferromagnetism #Ferromagnetism #Heisenberg model #Physics of Superconductivity and Magnetism #Quantum #Quantum many-body systems #Specific heat #Theoretical and Computational Physics #Thermal #cond-mat.stat-mech

paper · pdf · doi:10.1088/0953-8984/10/48/023

9 pages, 9 postscript figures, RevTex

arxiv created 1998/06/28 · openalex publication_date 1998/12/07 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We investigate the thermodynamic properties of Heisenberg ferrimagnetic mixed-spin chains both numerically and analytically with particular emphasis on the combination of ferromagnetic and antiferromagnetic features. Employing a new density-matrix renormalization-group technique as well as a quantum Monte Carlo method, we reveal the overall thermal behaviour: at very low temperatures, the specific heat and the magnetic susceptibility multiplied by the temperature behave like and , respectively, whereas at intermediate temperatures, they exhibit a Schottky-like peak and a minimum, respectively. Developing the modified spin-wave theory, we complement the numerical findings and give precise estimates for the low-temperature behaviour.

Citations

• Density-matrix algorithms for quantum renormalization groups
• Thermodynamic properties of Heisenberg ferrimagnetic spin chains: Ferromagnetic-antiferromagnetic crossover
• Alternating-spin ladders
• Mixed Heisenberg chains: II. Thermodynamics
• Density Matrix Renormalization Group Method for 2D Classical Models
• Field Dependence of the Intrinsic Domain Magnetization of a Ferromagnet
• Continuum dynamics of the 1-D Heisenberg antiferromagnet: Identification with the O(3) nonlinear sigma model

Cited by

• The density-matrix renormalization group