Phonon-bottleneck enhanced magnetic hysteresis in a molecular paddle wheel complex of Ru$_2^{5+}$
Mesoscale and Nanoscale Physics
2007-05-23 v1 Materials Science
Abstract
The ruthenium based molecular magnet [Ru(D(3,5-ClPh)F)Cl(0.5HO)CH] (hereafter Ru) behaves as a two-level system at sufficiently low temperatures. The authors performed spin detection by means of single-crystal measurements and obtained magnetic hysteresis loops around zero bias as a function of field sweeping rate. Compared to other molecular systems, Ru presents an enhanced irreversibility as shown by ``valleys'' of negative differential susceptibility in the hysteresis curves. Simulations based on phonon bottleneck model are in good qualitative agreement and suggest an abrupt spin reversal combined with insufficient thermal coupling between sample and cryostat phonon bath.
Keywords
Cite
@article{arxiv.cond-mat/0612536,
title = {Phonon-bottleneck enhanced magnetic hysteresis in a molecular paddle wheel complex of Ru$_2^{5+}$},
author = {L. Chen and C. M. Ramsey and N. S. Dalal and T. Ren and F. A. Cotton and W. Wernsdorfer and I. Chiorescu},
journal= {arXiv preprint arXiv:cond-mat/0612536},
year = {2007}
}
Comments
4 pages, 3 figures