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arXiv · 2403.13596

Tailoring Physical Properties of Crystals through Synthetic Temperature Control: A Case Study for new Polymorphic NbFeTe2 phases

Hanlin Wu·Sheng Li·Yan Lyu·Yucheng Guo·Wenhao Liu·Ji Seop Oh·Yichen Zhang·Sung-Kwan Mo·Clarina dela Cruz·Robert J. Birgeneau·Keith M. Taddei·Ming Yi·Li Yang·Bing Lv
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Abstract

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.

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Hanlin Wu, Sheng Li, Yan Lyu, Yucheng Guo, Wenhao Liu, Ji Seop Oh, Yichen Zhang, Sung-Kwan Mo, Clarina dela Cruz, Robert J. Birgeneau, Keith M. Taddei, Ming Yi, Li Yang, Bing Lv. 2024-03-20. Tailoring Physical Properties of Crystals through Synthetic Temperature Control: A Case Study for new Polymorphic NbFeTe2 phases. https://arxiv.org/abs/2403.13596

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