Single crystal growth of Mn4Nb2O9and its structure-magnetic coupling
Single crystal growth of Mn4Nb2O9and its structure-magnetic coupling
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Mn4Nb2O9单晶生长及其结构-磁耦合
DOI：
10.1039/c6ra26231g
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发表时间：
2017
期刊：
影响因子：
3.9
通讯作者：
Cao Shixun
中科院分区：
文献类型：
--
作者：
Cao Yiming;Xiang Maolin;Feng Zhenjie;Kang Baojuan;Zhang Jincang;Guiblin Nicolas;Ren Wei;Dkhil Brahim;Cao Shixun
采用基于光学浮区技术的一步法生长了直径约8 mm、长约30 mm的Mn4Nb2O9单晶。清晰的劳厄斑点和尖锐的XRD布拉格反射证明了良好的晶体质量。Mn_4Nb_2O_9单晶在TN = 108.4 K时沿c轴沿着方向发生反铁磁相变，与同结构族的Co_4Nb_2O_9形成鲜明对比。在TN下，随着a轴收缩和c轴膨胀的结构变化表现出显著的各向异性磁致伸缩效应。
A single crystal of Mn4Nb2O9 of about 8 mm in diameter and 30 mm in length was successfully grown by a newly designed one-step method based on the optical floating zone technique. Clear Laue spots and sharp XRD Bragg reflections attest the good crystal quality. The antiferromagnetic phase transition at TN = 108.4 K of the Mn4Nb2O9 single crystal was observed along the c axis, which contrasts with Co4Nb2O9 belonging to the same structural family. Structural changes with a-axis shrinkage and c-axis expansion at TN demonstrate a significant and anisotropic magnetostriction effect.