Low-Temperature Properties of Quasi-One-Dimensional Molecule-Based Ferromagnets
Abstract
Quantum and thermal behaviors of low-dimensional mixed-spin systems are investigated with particular emphasis on the design of molecule-based ferromagnets. One can obtain a molecular ferromagnet by assembling molecular bricks so as to construct a low-dimensional system with a magnetic ground state and then coupling the chains or the layers again in a ferromagnetic fashion. Two of thus-constructed quasi-one-dimensional bimetallic compounds are qualitatively viewed within the spin-wave treatment, one of which successfully grows into a bulk magnet, while the other of which ends in a singlet ground state. Then, concentrating on the ferrimagnetic arrangement on a two-leg ladder which is well indicative of general coupled-chain ferrimagnets, we develop the spin-wave theory and fully reveal its low-energy structure. We inquire further into the ferromagnetic aspect of the ferrimagnetic ladder numerically calculating the sublattice magnetization and the magnetic susceptibility. There exists a moderate coupling strength between the chains in order to obtain the most ferromagnetic ferrimagnet.
Keywords
Cite
@article{arxiv.cond-mat/0102417,
title = {Low-Temperature Properties of Quasi-One-Dimensional Molecule-Based Ferromagnets},
author = {Takashi Nakanishi and Shoji Yamamoto and Toru Sakai},
journal= {arXiv preprint arXiv:cond-mat/0102417},
year = {2009}
}
Comments
10 pages, 7 figures embedded, to be published in J. Phys. Soc. Jpn. Vol.70, No.5 (2001)