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arXiv 1509.09043cond-mat.mtrl-sci
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RA1 $_3$ C $_3$(R =稀土)中磁场引起的结构域转换

Structural Domain Switching by Magnetic Fields in RAl$_3$C$_3$ (R=Rare Earth)

T. Matsumura, Y. Hayashi, S. Takai, T. Otsubo, S. Matsuda, A. Ochiai

摘要:

用X射线衍射研究了R = Yb,Tm,Er,Dy和Lu的RA1 $_3$ C $_3$的半方晶到正交晶的结构转变。我们报告如何通过调整外部磁场控制正交畴。结果表明,当R离子为磁性离子时,RA1 $_3$ C $_3$中的正交畴可以被磁场定向排列.它也表明,一个单畴状态可以切换到另一个单畴状态的字段,即使在顺磁状态与小的感应力矩。然而,对于R = Lu,不可能通过高达70 kOe的场来改变多畴状态。我们讨论了在RA1 $_3$ C $_3$的正交相中的磁各向异性引起的磁畴选择和开关。我们还提出了一个想法来解释Khalyavin等人[Phys. Rev. B \textbf{87},220406(2013)]揭示的场诱导反铁磁性。

英文摘要:

Hexagonal-to-orthorhombic structural transitions in RAl$_3$C$_3$ have been studied by X-ray diffraction for R=Yb, Tm, Er, Dy, and Lu. We report how orthorhombic domains are controlled by adjusting external magnetic fields. It is shown that orthorhombic domains in RAl$_3$C$_3$ can be aligned by the field when the R ion is magnetic. It is also shown that a single-domain state can be switched to another single-domain state by the field even in paramagnetic states with small induced moments. For R=Lu, however, it was not possible to change the multidomain state by a field of up to 70 kOe. We discuss that domain selection and switching are caused by magnetic anisotropies in the orthorhombic phase of RAl$_3$C$_3$. We also propose an idea to explain the field-induced antiferromagnetism revealed by Khalyavin et al. [Phys. Rev. B \textbf{87}, 220406 (2013)].

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