Ferromagnetic intercalated compounds CrHfxTe2 with a magnetocaloric effect and negative magnetoresistance

IF 5.1 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Journal of Materials Chemistry C Pub Date : 2025-09-04 DOI:10.1039/D5TC02160J

Kunqi Li, Xueyang Tu, Xuzhou Sun, Hui Bi, Yuqiang Fang and Fuqiang Huang

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Abstract

Intercalation in van der Waals materials enables novel structures and exotic properties. Herein, we have successfully synthesized two intercalated compounds CrHf_xTe₂ (x = 0.1, 1/3) via a flux method. CrHf_0.1Te₂ and CrHf_1/3Te₂ exhibit ferromagnetism with Curie temperatures of 234.9 K and 247.2 K under out-of-plane fields. The maximum magnetic entropy variation of CrHf_0.1Te₂ attains 2.85 J kg⁻¹ K near 185 K, and the relative cooling power (216.6 J kg⁻¹) exceeds that of multiple van der Waals ferromagnets. Furthermore, negative magnetoresistances of −3.8% and −4.7% are respectively observed in CrHf_0.1Te₂ and CrHf_1/3Te₂. This work provides a strategy for designing new intercalation compounds promising for electronic and magnetic applications.

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具有磁热效应和负磁阻的铁磁插层化合物CrHfxTe2

嵌入在范德华材料中可以实现新颖的结构和奇异的性能。本文通过通量法成功地合成了两个插层化合物CrHfxTe2 （x = 0.1, 1/3）。CrHf0.1Te2和CrHf1/3Te2在面外场下的居里温度分别为234.9 K和247.2 K，表现出铁磁性。在185 K附近，CrHf0.1Te2的最大磁熵变化达到2.85 J kg−1 K，相对冷却功率（216.6 J kg−1）超过了多个范德华铁磁体。此外，CrHf0.1Te2和CrHf1/3Te2的负磁阻分别为- 3.8%和- 4.7%。这项工作为设计具有电子和磁性应用前景的新型插层化合物提供了一种策略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Materials Chemistry C MATERIALS SCIENCE, MULTIDISCIPLINARY-PHYSICS, APPLIED

CiteScore

10.80

自引率

6.20%

发文量

1468

期刊介绍： The Journal of Materials Chemistry is divided into three distinct sections, A, B, and C, each catering to specific applications of the materials under study: Journal of Materials Chemistry A focuses primarily on materials intended for applications in energy and sustainability. Journal of Materials Chemistry B specializes in materials designed for applications in biology and medicine. Journal of Materials Chemistry C is dedicated to materials suitable for applications in optical, magnetic, and electronic devices. Example topic areas within the scope of Journal of Materials Chemistry C are listed below. This list is neither exhaustive nor exclusive. Bioelectronics Conductors Detectors Dielectrics Displays Ferroelectrics Lasers LEDs Lighting Liquid crystals Memory Metamaterials Multiferroics Photonics Photovoltaics Semiconductors Sensors Single molecule conductors Spintronics Superconductors Thermoelectrics Topological insulators Transistors