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arXiv 2210.05099cond-mat.mtrl-scicond-mat.str-el
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具有手性晶体结构的新型钆基磁性化合物GdPt $_2$ B

New Gd-based magnetic compound GdPt$_2$B with a chiral crystal structure

Yoshiki J. Sato, Hikari Manako, Yoshiya Homma, Dexin Li, Ryuji Okazaki, Dai Aoki

摘要:

本文报道了一种新的具有手性晶体结构的Gd基磁性化合物GdPt $_2$ B的发现。X射线衍射和化学组成分析表明GdPt $_2$ B具有CePt $_2$ B型晶体结构(空间群:$P6_422$)。此外,我们成功地生长GdPt $_2$ B单晶体使用的直拉法。磁化强度测量和Curie $-$ Weiss分析表明,GdPt $_2$ B中的铁磁相互作用占主导地位。在$T_{\rm O}$ = 87 K时,电阻率、磁化率和比热随温度的变化关系出现明显的转变。GdPt $_2$ B的磁相图由场极化的铁磁区和磁有序区组成,类似于已知的手性helimagnets。此外,磁化率测量揭示了一个可能的自旋重取向内的磁有序相在磁场垂直于螺旋轴。结果表明,GdPt $_2$ B是研究稀土基手性化合物中铁磁性和反对称交换相互作用竞争效应的合适平台。

英文摘要:

Herein, we report the discovery of a novel Gd-based magnetic compound GdPt$_2$B with a chiral crystal structure. X-ray diffraction and chemical composition analyses reveal a CePt$_2$B-type crystal structure (space group: $P6_422$) for GdPt$_2$B. Moreover, we successfully grew single crystals of GdPt$_2$B using the Czochralski method. Magnetization measurements and the Curie$-$Weiss analysis demonstrate that the ferromagnetic interaction is dominant in GdPt$_2$B. A clear transition is observed in the temperature dependence of electrical resistivity, magnetic susceptibility, and specific heat at $T_{\rm O}$ = 87 K. The magnetic phase diagram of GdPt$_2$B, which consists of a field-polarized ferromagnetic region and a magnetically ordered region, resembles those of known chiral helimagnets. Furthermore, magnetic susceptibility measurements reveal a possible spin reorientation within the magnetically ordered phase in magnetic fields perpendicular to the screw axis. The results demonstrate that GdPt$_2$B is a suitable platform for investigating the competing effects of ferromagnetic and antisymmetric exchange interactions in rare-earth-based chiral compounds.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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