Institute for Superconducting and Electronic Materials, Australian Institute for Innovative Materials, University of Wollongong, North Wollongong, New South Wales, 2500, Australia. School of Physics and Engineering, Qufu Normal University, Qufu 273165, People's Republic of China.
Nanotechnology. 2017 Nov 24;28(47):475703. doi: 10.1088/1361-6528/aa8f6c.
We have carried out a detailed investigation of the magnetism, valence state, and magnetotransport in VSe bulk single crystals, as well as in laminates obtained by mechanical exfoliation. In sharp contrast to the ferromagnetic behavior reported previously, here, no ferromagnetism could be detected for VSe single crystal and laminate from room temperature down to 2 K. Neither did we find the Curie paramagnetism expected due to the 3d odd-electronic configuration of covalent V ions. Rather, intrinsic VSe is a non-magnetic alloy without local moment. Only a weak paramagnetic contribution introduced by defects is noticeable below 50 K. A weak localization effect due to defects was also observed in VSe single crystals for the first time.
我们对 VSe 体单晶以及机械剥离得到的层压板的磁性、价态和磁输运进行了详细的研究。与之前报道的铁磁行为形成鲜明对比的是，在这里，VSe 单晶和层压板在室温到 2 K 的温度范围内都没有检测到铁磁性。我们也没有发现由于共价 V 离子的 3d 奇数电子组态而预期的居里顺磁体。相反，本征 VSe 是一种没有局域磁矩的非磁性合金。只有在 50 K 以下才能注意到由缺陷引起的微弱顺磁贡献。我们还首次在 VSe 单晶中观察到了由于缺陷引起的弱局域化效应。
