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

Abstract

<jats:title>Abstract</jats:title><jats:p>The influence of 1.9 MeV proton irradiation on structural and magnetic properties has been explored in the two-dimensional (2D) NiSO<jats:sub>4</jats:sub>(1,3-phenylenediamine)<jats:sub>2</jats:sub> 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 <jats:italic>T</jats:italic> = 2.0 K varied with the proton dose, achieving a 50% increase in magnetization in the highest measured field µ<jats:sub>0</jats:sub><jats:italic>H</jats:italic><jats:sub>dc</jats:sub> = 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.</jats:p>

Topics

• impedance spectroscopy
• Hydrogen
• two-dimensional
• magnetization
• infrared spectroscopy