Long range magnetic ordering in a spin-chain compound, Ca$_3$CuMnO$_6$, with multiple bond distances
摘要
The results of ac and dc magnetization and heat capacity measurements as a function of temperature (T = 1.8 to 300 K) are reported for a quasi-one-dimensional compound, CaCuMnO, crystallizing in a triclinically distorted KCdCl-type structure. The results reveal that this compound undergoes antiferromagnetic ordering close to 5.5 K. In addition, there is another magnetic transition below 3.6 K. Existence of two long-range magnetic transitions is uncommon among quasi-one-dimensional systems. It is interesting to note that both the magnetic transitions are of long-range type, instead of spin-glass type, in spite of the fact that the Cu-O and Mn-O bond distances are multiplied due to this crystallographic distortion. In view of this, this compound could serve as a nice example for studying "order-in-disorder" phenomena.
引用
@article{arxiv.cond-mat/0306166,
title = {Long range magnetic ordering in a spin-chain compound, Ca$_3$CuMnO$_6$, with multiple bond distances},
author = {Kausik Sengupta and S. Rayaprol and K. K. Iyer and E. V. Sampathkumaran},
journal= {arXiv preprint arXiv:cond-mat/0306166},
year = {2009}
}
备注
Physical Review (in press)