Antiferromagnetism of perovskite EuZrO3
Antiferromagnetism of perovskite EuZrO3
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DOI：
10.1016/j.jssc.2009.10.014
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发表时间：
2010
影响因子：
3.3
通讯作者：
Yanhua Zong;K. Fujita;H. Akamatsu;S. Murai;Katsuhisa Tanaka
中科院分区：
文献类型：
--
作者：
Yanhua Zong;K. Fujita;H. Akamatsu;S. Murai;Katsuhisa Tanaka
采用EuO与ZrO{sub 2}的固相反应合成了多晶EuZrO{sub 3}，并对其结构和磁性能进行了研究。x射线衍射图的Rietveld分析表明EuZrO{sub 3}结晶为正交钙钛矿结构。{sup 151}Eu - Moessbauer效应测量表明，几乎所有的铕离子都以二价态存在，并占据具有非轴向电场梯度的畸变位，符合正交结构。与先前的报道相反，在4.1 K左右观察到反铁磁跃迁。讨论了在尼尔温度下的磁性结构。-图解摘要：合成了几乎所有Eu离子都以Eu{sup 2+}形式存在的钙钛矿EuZrO{sub 3}，并对其结构和磁性能进行了研究。在4.1 K左右首次观测到反铁磁跃迁。讨论了磁跃迁的机理。
Polycrystalline EuZrO{sub 3} has been synthesized by the solid-state reaction between EuO and ZrO{sub 2}, and its structural and magnetic properties have been investigated. Rietveld analysis of the X-ray diffraction pattern indicates that EuZrO{sub 3} crystallizes in an orthorhombic perovskite structure. {sup 151}Eu Moessbauer effect measurement reveals that almost all the europium ions are present as the divalent state and occupy distorted sites with non-axial electric field gradients, in agreement with the orthorhombic structure. In contrast to previous reports, an antiferromagnetic transition was observed around 4.1 K. The magnetic structure below the Neel temperature has been discussed. - Graphical abstract: Perovskite EuZrO{sub 3} with almost all Eu ions present as Eu{sup 2+} has been synthesized and its structure and magnetic properties have been studied. An antiferromagnetic transition was observed around 4.1 K for the first time. The mechanism of the magnetic transition has been discussed.