Abstract
A physical picture of spin alignments in organic moleculebased ferrimagnets is deduced from quantum Monte Carlo (QMC) simulations of magnetic susceptibility. It is found from the QMC calculations on the basis of a Heisenberg spin Hamiltonian that the ferrimagnetic spin alignment in S=1 and S=1/2 alternating molecular chains is equivalent to a ferromagnetic alignment of effective S=1/2 spins appearing in the unit cells of the heteromolecular chains. A spin polarization effect affording the effective ferromagnetic interactions is demonstrated in terms of a Heitler-London approximation.
Original language | English |
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Pages (from-to) | 495-500 |
Number of pages | 6 |
Journal | Molecular Crystals and Liquid Crystals Science and Technology Section A: Molecular Crystals and Liquid Crystals |
Volume | 376 |
DOIs | |
Publication status | Published - 2002 |
Externally published | Yes |
Event | Proceedings of the Interdisciplinary Symposium on Multifunctionality of Inorganic , Organic, and Their Hybrid Solids - Honolulu, HI, United States Duration: 2000 Dec 15 → 2000 Dec 18 |
Keywords
- Heisenberg spin Hamiltonian
- Magnetic susceptibility
- Organic ferrimagnet
- Quantum Monte Carlo simulation
- Spin polarization
ASJC Scopus subject areas
- Condensed Matter Physics