Browsing by author "Kayser, Paula"
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Magnetic and structural studies of Sc containing ruthenate double perovskites A2ScRuO6 (A = Ba, Sr).
Kayser, Paula; Injac, Sean; Ranjbar, Ben; Kennedy, Brendan J; Avdeev, Maxim; Yamaura, KazunariPublished 2017-01-01Ruthenium containing double perovskites A2ScRuO6 have been synthesized as polycrystalline powders and structurally characterized using a combination of synchrotron X-ray and neutron powder diffraction methods. When A = ...Open AccessArticle -
Spin-orbit coupling controlled ground state in the Ir(V) perovskites A2ScIrO6 (A = Ba or Sr)
Kayser, Paula; Kennedy, Brendan J; Ranjbar, Ben; Kimpton, Justin; Avdeev, MaximPublished 2017-01-01The structural and magnetic properties of the two Ir(V) perovskites Ba2ScIrO6 and Sr2ScIrO6 have been established. The structures were refined using a combined neutron and Synchrotron data set. At room temperature the ...Open AccessArticle -
Squeezing electrons out of 6s2 lone-pairs in perovskite-type oxides
Wang, Chun-Hai; Kayser, Paula; Kennedy, Brendan J; Maynard-Casely, H E; Gu, Qinfen; Ling, Chris DPublished 2019Having identified a set of conditions that predispose a solid-state ionic compound to a pressure-induced valence transition, we investigated a series of Bi(III) perovskite oxides. We found such a transition below 10 GPa ...Open AccessArticle -
Stability and range of the type II Bi1-xWxO1.5+1.5x solid solution
Wind, Julia; Kayser, Paula; Zhang, Zhaoming; Radosavljevic Evans, Ivana; Ling, Chris DPublished 2017-01-01We have established the stability and range of the cubic type II phase of Bi1-xWxO1.5+1.5x using a combination of X-ray diffraction, neutron diffraction and X-ray absorption spectroscopy. Type II is a high temperature ...Open AccessArticle -
Structural and magnetic properties of the osmium double perovskites Ba2-xSrxYOsO6
Kayser, Paula; Injac, Sean; Kennedy, Brendan J; Vogt, Thomas; Avdeev, Maxim; Maynard-Casely, Helen; Zhaoming, ZhangPublished 2017-01-01The crystal and magnetic structures of double perovskites of the type Ba2-xSrxYOsO6 have been studied by synchrotron X-ray and neutron powder diffraction methods, bulk magnetic susceptibility measurements and X-ray absorption ...Open AccessArticle -
Structure and Magnetism in Sr1-xAxTcO3 Perovskites. The importance of the A-site cation.
Reynolds, Emily; Avdeev, Maxim; Thorogood, Gordon J; Poineau, Frederic; Czerwinski, Kenneth R; Kimpton, Justin A; Yu, Michelle; Kayser, Paula; Kennedy, Brendan JPublished 2017-01-01The Sr1-xBaxTcO3 (x = 0, 0.1, 0.2) oxides were prepared and their solid-state and magnetic structure studied as a function of the temperature by x-ray and neutron powder diffraction. The refined Tc moments at room temperature ...Open AccessArticle -
Thermal Expansion in BaRuO3 Perovskites – an unusual case of bond strengthening at high temperatures
Kayser, Paula; Injac, Sean; Kennedy, Brendan J; Menezes de Oliveira, Andre; Shirako, Yuichi; Hasegawa, MasashiPublished 2017-01-01The temperature dependence of the structures of three polytypes of BaRuO3 have been investigated between room temperature and 1000 °C using high resolution Synchrotron X-ray diffraction. The structural studies reveal a ...Open AccessArticle
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