In Hg1−xMnxTe (x≥0.16) monocrystal, the giant-diamagnetic (GDM) and magnetization-step phenomena have been observed in spin glass (SG) regime. The susceptibility of GDM is about 100-1000 times than that of classic diamagnetic. It can be interpreted that: due to the long-range antiferromagnetic (AF) exchange interactions and the non-uniform random distribution of Mn2+ ions in Hg1−xMnxTe, a quasi-static spin wave forms and produces the GDM phenomenon below the critical temperature and magnetic field. Meanwhile, this theory is proved by Monte Carlo simulations in a two-dimensional AF cluster based on XY model. Hence, it is possible to emerge long-range magnetic order structure in SG state.
@article{arxiv.1104.0995,
title = {Giant-diamagnetic and magnetization-step effects in HgMnTe monocrystal},
author = {Liangqing Zhu and Tie Lin and Jun Shao and Zheng Tang and Junyu Zhu and Xiaodong Tang and Junhao Chu},
journal= {arXiv preprint arXiv:1104.0995},
year = {2011}
}