YbAl2中压力诱导价态转变的111Cd-TDPAC研究
材料科学
2007-05-23 v1
摘要
通过TDPAC谱学，在高达80 kbar的压力下测量了中间价化合物YbAl2中111Cd杂质核处的四极相互作用。发现位于YbAl2中Al位点的111Cd上测量的四极频率nQ随压力增加至80 kbar呈非线性变化，并增加了近四倍。观察到由Yb L3 OFY-XAS和RXES测量得到的平均Yb价态与电场梯度（四极频率nQ=eQVzz/h）之间存在线性相关性。还测量了GdAl2、YbAl3、TmAl3和CaAl2化合物中111Cd的四极频率。考虑了从关系nQ(u(P)) = n2 + (n3 - n2)u(P)确定Yb与p金属化合物中Yb价态的可能性。
引用
@article{arxiv.cond-mat/0703608,
title = {111Cd- TDPAC study of pressure-induced valence transition in YbAl2},
author = {A. V. Tsvyashchenko and L. N. Fomicheva and V. B. Brudanin and O. I. Kochetov and A. V. Salamatin and A. Velichkov and M. Wiertel and M. Budzynski and A. A. Sorokin and G. K. Ryasniy and B. A. Komissarova and M. Milanov},
journal= {arXiv preprint arXiv:cond-mat/0703608},
year = {2007}
}