通过合成温度控制定制晶体的物理性质:新型多晶型 NbFeTe2 相的案例研究
Tailoring Physical Properties of Crystals through Synthetic Temperature Control: A Case Study for new Polymorphic NbFeTe2 phases
AI总结:
以范德华磁性 NbFeTe2 为例,发现通过控制合成温度可获得具有截然不同晶体对称性、电子结构、电输运和磁性的多晶型相,表明调节合成参数是改变材料物理性质的有效途径。
摘要:
生长参数对层状材料的晶体质量和物理性质起着重要作用。在此,我们展示了一项关于范德华磁性 NbFeTe2 材料的案例研究。在不同温度下合成的两种不同类型的多晶型 NbFeTe2 相,在晶体对称性、电子结构、电输运和磁性方面表现出显著不同的行为。低温下合成的相表现出与先前报道一致的行为,而高温下合成的新相则具有完全不同的物理性质,如金属电阻率、长程铁磁序、反常霍尔效应、负磁阻以及截然不同的电子结构。中子衍射揭示了 70K 以下存在面外铁磁性,这与电输运和磁化率研究的结果一致。我们的工作表明,以受控方式简单调节合成参数可能是改变现有材料物理性质的有效途径,有望解锁物质的新状态,甚至发现新材料。
英文摘要:
Growth parameters play a significant role in the crystal quality and physical properties of layered materials. Here we present a case study on a van der Waals magnetic NbFeTe2 material. Two different types of polymorphic NbFeTe2 phases, synthesized at different temperatures, display significantly different behaviors in crystal symmetry, electronic structure, electrical transport, and magnetism. While the phase synthesized at low temperature showing behavior consistent with previous reports, the new phase synthesized at high temperature, has completely different physical properties, such as metallic resistivity, long-range ferromagnetic order, anomalous Hall effect, negative magnetoresistance, and distinct electronic structures. Neutron diffraction reveals out-of-plane ferromagnetism below 70K, consistent with the electrical transport and magnetic susceptibility studies. Our work suggests that simply tuning synthetic parameters in a controlled manner could be an effective route to alter the physical properties of existing materials potentially unlocking new states of matter, or even discovering new materials.
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。