Magnetic characterization and low-temperature heat transport properties of the orthoferrites RFeO3(R = rare earth and Y) single crystals
Magnetic characterization and low-temperature heat transport properties of the orthoferrites RFeO3(R = rare earth and Y) single crystals
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DOI：
10.1109/intmag.2015.7157359
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发表时间：
2015-05
期刊：
影响因子：
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通讯作者：
F. Zhang;S. Li;J. Song;J. Shi;X. Sun
中科院分区：
文献类型：
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作者：
F. Zhang;S. Li;J. Song;J. Shi;X. Sun
仅给出摘要表格。正铁氧体RFeO3（R=Y、La、Lu除外）具有两组磁性亚晶格，即Fe3+子系和R3+子系。磁性和两个子系统之间的相互作用（包括Fe-Fe、R-Fe和R-R相互作用）取决于温度、磁场等外部参数。因此真正的磁性材料可以表现出丰富的低温特性。我们使用四镜面炉通过浮区技术成功生长了正铁氧体 RFeO3(R = Dy、Ho 和 Y) 和 Ho1-xYxFeO3(x = 0 .1 和 0 .3)。卤素灯功率和晶体生长气氛被认为是最重要的参数。 X射线衍射数据和X射线劳厄照片证明了高质量的单晶。随着温度降低的磁转变以及 RFeO3 中稀土离子和 Fe3+ 的场感应磁相变可以通过低温磁化和比热测量来表征。此外，我们报告了这些正铁氧体单晶的低温热传输测量，以探测磁性，发现它们表现出很强的磁场依赖性。特征场与磁结构的一些变换有很好的对应关系。这些特殊行为证明了磁场引起的 Fe3+ 和 R3+ 自旋结构的转变。
Summary form only given. Orthoferrites RFeO3(except R=Y, La and Lu) possess two sets of magnetic sublattice, that is, Fe3+ sub-system and R3+ sub-system. Magnetic properties and interactions between the two sub-systems including Fe-Fe, R-Fe, and R-R interactions depend on external parameters, such as temperature, magnetic field, etc. So real magnetic materials can exhibt rich low temperature characteristics. We have successfully grown the orthoferrites RFeO3(R = Dy, Ho and Y) and Ho1-xYxFeO3(x = 0 .1 and 0 .3) by the floating zone technique using a four-mirror image furnace. The halogen lamp power and crystal growth atmosphere were identified to be the most important parameters. High-quality single crystals have been demonstrated by the X-ray diffraction data and X-ray Laue photograph. The magnetic transitions with decreasing temperature and the field-induced magnetic phase transitions in RFeO3 for the rare earth ions and Fe3+ can be characterized by low-temperature magnetization and specific heat measurements. In addition, we report the low-temperature heat transport measurements of these orthoferrites single crystals to probe the magnetic properties and find that they show strong magnetic field dependence. The characteristic fields have a good correspondence with some transformations of the magnetic structure. These special behaviors demonstrate the magnetic field-induced transitions of the Fe3+ and R3+ spin structure.