Structure and magnetism in Sr1-xAxTcO3 perovskites: Importance of the A-site cation

被引：4
|
作者：
Reynolds, Emily [1 ]
Avdeev, Maxim [2 ]
Thorogood, Gordon J. [2 ]
Poineau, Frederic [3 ]
Czerwinski, Kenneth R. [3 ]
Kimpton, Justin A. [4 ]
Yu, Michelle [5 ]
Kayser, Paula [5 ]
Kennedy, Brendan J. [5 ]
机构：
[1] Univ Oxford, Inorgan Chem Lab, S Parks Rd, Oxford OX1 3QR, England
[2] Australian Nucl Sci & Technol Org, Lucas Heights, NSW 2234, Australia
[3] Univ Nevada, Dept Chem & Biochem, 4505 Maryland Pkwy, Las Vegas, NV 89154 USA
[4] Australian Synchrotron, 800 Blackburn Rd, Clayton, Vic 3168, Australia
[5] Univ Sydney, Sch Chem, Sydney, NSW 2006, Australia
来源：
PHYSICAL REVIEW B | 2017年 / 95卷 / 05期
基金：
澳大利亚研究理事会;
关键词：
PHASE-TRANSITIONS; AUSTRALIAN SYNCHROTRON; HIGH-PRESSURE; SRTCO3; FERROMAGNETISM; DIFFRACTION; BEAMLINE; SRRUO3;
D O I：
10.1103/PhysRevB.95.054430
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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 Neel temperatures for Ba0.1Sr0.9TcO3 and Ba0.2Sr0.8TcO3 were 2.32(14) mu(beta) and 2.11(13) mu(beta) and 714 degrees C and 702 degrees C, respectively. In contrast to expectations, the Neel temperature in the series Sr(1-x)A(x)TcO(3) decreases with increasing Ba content. This observation is consistent with previous experimental measurements for the two series AMO(3) (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 pi(*) bandwidth and ultimately the magnetic ordering temperature.
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页数：7
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