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Heteroepitaxy of 2D CuCr2Te4 with Robust Room-temperature Ferromagnetism
Advanced Materials ( IF 27.4 ) Pub Date : 2023-02-13 , DOI: 10.1002/adma.202211388 Hao Wang 1 , Yao Wen 1 , Xiaoxu Zhao 2 , Ruiqing Cheng 1 , Lei Yin 1 , Baoxing Zhai 1 , Jian Jiang 1 , Zhongwei Li 1 , Chuansheng Liu 1 , Fengcheng Wu 1, 3 , Jun He 1, 3, 4, 5
Advanced Materials ( IF 27.4 ) Pub Date : 2023-02-13 , DOI: 10.1002/adma.202211388 Hao Wang 1 , Yao Wen 1 , Xiaoxu Zhao 2 , Ruiqing Cheng 1 , Lei Yin 1 , Baoxing Zhai 1 , Jian Jiang 1 , Zhongwei Li 1 , Chuansheng Liu 1 , Fengcheng Wu 1, 3 , Jun He 1, 3, 4, 5
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Magnetic materials in 2D have attracted widespread attention for their intriguing magnetic properties. 2D magnetic heterostructures can provide unprecedented opportunities for exploring fundamental physics and novel spintronic devices. Here, the heteroepitaxial growth of ferromagnetic CuCr2Te4 nanosheets is reported on Cr2Te3 and mica by chemical vapor deposition. Magneto-optical Kerr effect measurements reveal the thickness-dependent ferromagnetism of CuCr2Te4 nanosheets on mica, where a decrease of Curie temperature (TC) from 320 to 260 K and an enhancement of perpendicular magnetic anisotropy with reducing thickness are observed. Moreover, lattice-matched heteroepitaxial ultrathin CuCr2Te4 on Cr2Te3 exhibits an enhanced robust ferromagnetism with TC up to 340 K due to the interfacial charge transfer. Stripe-type magnetic domains and single magnetic domain are discovered in this heterostructure with different thicknesses. The work provides a way to construct robust room-temperature 2D magnetic heterostructures for functional spintronic devices.
中文翻译：
具有稳健室温铁磁性的二维 CuCr2Te4 异质外延
二维磁性材料因其有趣的磁性而受到广泛关注。二维磁性异质结构可以为探索基础物理学和新型自旋电子器件提供前所未有的机会。在此，通过化学气相沉积在 Cr 2 Te 3和云母上报道了铁磁性 CuCr 2 Te 4纳米片的异质外延生长。磁光克尔效应测量揭示了云母上 CuCr 2 Te 4纳米片的厚度依赖性铁磁性，其中居里温度 ( T C) 从 320 到 260 K，观察到垂直磁各向异性随着厚度的减小而增强。此外，由于界面电荷转移，Cr 2 Te 3上的晶格匹配异质外延超薄 CuCr 2 Te 4表现出增强的稳健铁磁性，T C高达 340 K。在这种具有不同厚度的异质结构中发现了条状磁畴和单磁畴。这项工作提供了一种为功能性自旋电子器件构建稳健的室温二维磁性异质结构的方法。
更新日期：2023-02-13
中文翻译：
具有稳健室温铁磁性的二维 CuCr2Te4 异质外延
二维磁性材料因其有趣的磁性而受到广泛关注。二维磁性异质结构可以为探索基础物理学和新型自旋电子器件提供前所未有的机会。在此，通过化学气相沉积在 Cr 2 Te 3和云母上报道了铁磁性 CuCr 2 Te 4纳米片的异质外延生长。磁光克尔效应测量揭示了云母上 CuCr 2 Te 4纳米片的厚度依赖性铁磁性，其中居里温度 ( T C) 从 320 到 260 K，观察到垂直磁各向异性随着厚度的减小而增强。此外，由于界面电荷转移，Cr 2 Te 3上的晶格匹配异质外延超薄 CuCr 2 Te 4表现出增强的稳健铁磁性，T C高达 340 K。在这种具有不同厚度的异质结构中发现了条状磁畴和单磁畴。这项工作提供了一种为功能性自旋电子器件构建稳健的室温二维磁性异质结构的方法。
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