Defect-induced ferromagnetism in a S = 1/2 quasi-one-dimensional Heisenberg antiferromagnetic chain compound

Zhe Wang; Lin Hu; Langsheng Lin; Yuyan Han; Ning Hao; Jingtao Xu; Qianwang Chen; Zhe Qu

doi:10.1038/s41598-021-93930-1

Defect-induced ferromagnetism in a S = 1/2 quasi-one-dimensional Heisenberg antiferromagnetic chain compound

Sci Rep. 2021 Jul 14;11(1):14442. doi: 10.1038/s41598-021-93930-1.

Authors

Zhe Wang^{1

2}, Lin Hu^{3

4}, Langsheng Lin¹, Yuyan Han¹, Ning Hao¹, Jingtao Xu⁵, Qianwang Chen^{1

6}, Zhe Qu^{7

8}

Affiliations

¹ Anhui Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, Hefei Institutes of Physical Sciences, Chinese Academy of Sciences, Hefei, 230031, Anhui, China.
² Science Island Branch of Graduate School, University of Science and Technology of China, Hefei, 230026, Anhui, China.
³ Anhui Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, Hefei Institutes of Physical Sciences, Chinese Academy of Sciences, Hefei, 230031, Anhui, China. hulin@hmfl.ac.cn.
⁴ CAS Key Lab of Photovoltaic and Energy Conservation Materials, Hefei Institutes of Physical Sciences, Chinese Academy of Sciences, Hefei, 230031, Anhui, China. hulin@hmfl.ac.cn.
⁵ Ningbo Ruiling Advanced Energy Materials Institute Co., Ltd, Ningbo, 315500, Zhejiang, China.
⁶ Hefei National Laboratory for Physical Sciences at Microscale, Department of Materials Science & Engineering, University of Science and Technology of China, Hefei, 230026, Anhui, China.
⁷ Anhui Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, Hefei Institutes of Physical Sciences, Chinese Academy of Sciences, Hefei, 230031, Anhui, China. zhequ@hmf.ac.cn.
⁸ CAS Key Lab of Photovoltaic and Energy Conservation Materials, Hefei Institutes of Physical Sciences, Chinese Academy of Sciences, Hefei, 230031, Anhui, China. zhequ@hmf.ac.cn.

Abstract

We present evidences that defects in the spin S = 1/2 Heisenberg antiferromagnetic chain (HAFC) compound can lead to ferromagnetism by studying the magnetic and thermal properties of the newly discovered quasi-one-dimensional (1D) metal-organic framework [CH₃NH₃][Cu(HCOO)₃] (MACuF). Our findings suggest that the long-range ferromagnetic order at 3.7 K can be attributed to Cu²⁺ ions from the 2D networks constructed by the endpoints of the broken chains. In such a case, the intrinsic magnetism can emerge in this quasi-1D Heisenberg chain system at the background of the short-range antiferromagnetism. This unusual ferromagnetism found in HAFC not only enriches magnetic features in the low-dimensional systems, but helps to understand some of the exotic magnetic phenomena in other real quasi-1D magnetic materials.

Grants and funding

U2032213/National Natural Science Foundation of China