Structure and Magnetism in S r1-xAxTc O3 Perovskites: Importance of the A-site Cation
Document Type
Article
Publication Date
1-1-2017
Publication Title
Physical Review B
Volume
95
Issue
5
Abstract
The Sr1-xBaxTcO3 (x=0, 0.1, 0.2) oxides were prepared and their solid-state and magnetic structure studied as a function of temperature by x-ray and neutron powder diffraction. The refined Tc moments at room temperature and Néel temperatures for Ba0.1Sr0.9TcO3 and Ba0.2Sr0.8TcO3 were 2.32(14)μβ and 2.11(13)μβ and 714 C and 702 C, respectively. In contrast to expectations, the Néel temperature in the series Sr1-xAxTcO3 decreases with increasing Ba content. This observation is consistent with previous experimental measurements for the two series AMO3 (M=Ru, Mn; A=Ca, Sr, Ba) where the maximum magnetic ordering temperature was observed for A=Sr. Taken with these previous results the current work demonstrates the critical role of the A-site cation in the broadening of the π∗ bandwidth and ultimately the magnetic ordering temperature. © 2017 American Physical Society.
Language
english
Repository Citation
Reynolds, E.,
Avdeev, M.,
Thorogood, G. J.,
Poineau, F.,
Czerwinski, K. R.,
Kimpton, J. A.,
Yu, M.,
Kayser, P.,
Kennedy, B. J.
(2017).
Structure and Magnetism in S r1-xAxTc O3 Perovskites: Importance of the A-site Cation.
Physical Review B, 95(5),
http://dx.doi.org/10.1103/PhysRevB.95.054430