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质子辐照对二维镍（II）分子磁体磁性的影响。

Influence of proton irradiation on the magnetic properties of two-dimensional Ni(II) molecular magnet.

作者信息

Czernia Dominik, Konieczny Piotr, Juszyńska-Gałązka Ewa, Perzanowski Marcin, Lekki Janusz, Guillén Anabel Berenice González, Łasocha Wiesław

机构信息

Institute of Nuclear Physics PAN, ul. Radzikowskiego 152, 31-342, Cracow, Poland.

Research Center for Thermal and Entropic Science, Graduate School of Science, Osaka University, 1-1 Machikaneyamacho, Toyonaka, Osaka, 560-0043, Japan.

出版信息

Sci Rep. 2023 Aug 28;13(1):14032. doi: 10.1038/s41598-023-41156-8.

DOI:10.1038/s41598-023-41156-8
PMID:37640778
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10462683/
Abstract

The influence of 1.9 MeV proton irradiation on structural and magnetic properties has been explored in the two-dimensional (2D) NiSO(1,3-phenylenediamine) coordination ferrimagnet. The X-ray powder diffraction and IR spectroscopy revealed that the octahedrons with Ni ion in the center remain unchanged regardless of the fluence a sample received. In contrast, proton irradiation greatly influences the hydrogen bonds in the flexible parts in which the 1,3-phenylenediamine is involved. Dc magnetic measurements revealed that several magnetic properties were modified with proton irradiation. The isothermal magnetization measured at T = 2.0 K varied with the proton dose, achieving a 50% increase in magnetization in the highest measured field µH = 7 T or a 25% decrease in remanence. The most significant change was observed for the coercive field, which was reduced by 90% compared to the non-irradiated sample. The observed results are accounted for the increased freedom of magnetic moments rotation and the modification of intralayer exchange couplings.

摘要

在二维（2D）NiSO(1,3 - 苯二胺)配位铁磁体中，研究了1.9 MeV质子辐照对其结构和磁性的影响。X射线粉末衍射和红外光谱表明，无论样品接受的注量如何，以镍离子为中心的八面体结构保持不变。相反，质子辐照极大地影响了涉及1,3 - 苯二胺的柔性部分中的氢键。直流磁测量表明，质子辐照改变了几种磁性。在T = 2.0 K下测量的等温磁化强度随质子剂量而变化，在最高测量场μH = 7 T中磁化强度增加了50%，或剩磁降低了25%。矫顽场的变化最为显著，与未辐照样品相比降低了90%。观察到的结果可归因于磁矩旋转自由度的增加和层内交换耦合的改变。

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