Effect of anisotropy on small magnetic clusters

2011/09/22 by Alfred Hucht, Sanjubala Sahoo, Shreekantha Sil +2 · 24 citations
Chemistry · Physics and Astronomy · #Anisotropy #Antiferromagnetism #Chemistry #Condensed matter physics #Dipole #Ferromagnetism #Frustration #Ground state #Heisenberg model #Magnetic anisotropy #Magnetic field #Magnetization #Physics #Physics of Superconductivity and Magnetism #Quantum many-body systems #Quantum mechanics #Spin (aerodynamics) #Spins #Tetrahedron #Theoretical and Computational Physics #cond-mat.mtrl-sci #cond-mat.stat-mech #physics.atm-clus

paper · pdf · doi:10.1103/physrevb.84.104438

published in Physical Review B 84(10) (American Physical Society) · 12 pages, 12 figures, 3 tables

openalex publication_date 2011/09/22 · arxiv created 2012/01/10 · arxiv updated 2012/01/11 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

The effect of dipolar interaction and local uniaxial anisotropy on the magnetic response of small spin clusters where spins are located on the vertices of icosahedron (I_h), cuboctahedron (O_h), tetrahedron (T_h), and square (D₄) geometries have been investigated. We consider the ferromagnetic and antiferromagnetic spin-1/2 and spin-1 Heisenberg model with uniaxial anisotropy and dipolar interaction and apply a numerical exact diagonalization technique to study the influence of frustration and anisotropy on the ground-state properties of the spin clusters. The ground-state magnetization, spin-spin correlation, and several thermodynamic quantities such as entropy and specific heat are calculated as functions of temperature and magnetic field.

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