Surface phase separation in nanosized charge-ordered manganites
材料科学
2007-05-23 v2 强关联电子
摘要
Recent experiments showed that the robust charge-ordering in manganites can be weakened by reducing the grain size down to nanoscale. Weak ferromagnetism was evidenced in both nanoparticles and nanowires of charge-ordered manganites. To explain these observations, a phenomenological model based on surface phase separation is proposed. The relaxation of superexchange interaction on the surface layer allows formation of a ferromagnetic shell, whose thickness increases with decreasing grain size. Possible exchange bias and softening of the ferromagnetic transition in nanosized charge-ordered manganites are predicted.
引用
@article{arxiv.cond-mat/0612391,
title = {Surface phase separation in nanosized charge-ordered manganites},
author = {S. Dong and F. Gao and Z. Q. Wang and J. -M. Liu and Z. F. Ren},
journal= {arXiv preprint arXiv:cond-mat/0612391},
year = {2007}
}
备注
4 pages, 3 figures