arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2005.00427cond-mat.mes-hallcond-mat.mtrl-sci
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Skyrmion晶格态和手征表面扭曲的全电探测

All-electrical detection of skyrmion lattice state and chiral surface twists

A. Aqeel, M. Azhar, N. Vlietstra, A. Pozzi, J. Sahliger, H. Huebl, T. T. M. Palstra, C. H. Back, M. Mostovoy

摘要:

通过测量薄Pt电极上的自旋霍尔磁电阻(SMR),研究了手性磁性绝缘体Cu $_2$ OSeO $_3$的高温相图.我们发现在分离不同的磁相的散装铜$_2$ OSeO $_3$的临界线的SMR信号的相位和幅度的明显变化。Skyrmion晶格态在SMR相中表现为强烈的倾斜。一个强大的增强的SMR振幅中观察到的锥形螺旋状态,我们解释了一个额外的diely-allowed贡献的SMR存在于非共线磁体。我们证明,SMR可以用作磁性绝缘体中手征表面扭曲和skyrmions的全电探针。

英文摘要:

We study the high-temperature phase diagram of the chiral magnetic insulator Cu$_2$OSeO$_3$ by measuring the spin-Hall magnetoresistance (SMR) in a thin Pt electrode. We find distinct changes in the phase and amplitude of the SMR signal at critical lines separating different magnetic phases of bulk Cu$_2$OSeO$_3$. The skyrmion lattice state appears as a strong dip in the SMR phase. A strong enhancement of the SMR amplitude is observed in the conical spiral state, which we explain by an additional symmetry-allowed contribution to the SMR present in non-collinear magnets. We demonstrate that the SMR can be used as an all-electrical probe of chiral surface twists and skyrmions in magnetic insulators.

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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